Search

The nests of mound-building ants are unexplored reservoirs of fungal diversity. A previous assessment of this diversity in the nests of Formica ulkei suggested that water availability may be a determinant of the composition of this mycota. To investigate this question, we recovered 3594 isolates of filamentous Ascomycota from the nests of Formica obscuripes and adjacent, non-nest sites, employing Dichloran Rose Bengal agar (DRBA), Dichloran Rose Bengal agar containing glycerol (DRBAG), and malt extract agar containing sucrose (MEA20S). Higher numbers of fungi were isolated from the tops of mounds than from within mounds and non-mound sites. Mound nest soils were dominated by members of the family Aspergillaceae, and up to 50% of the colonies isolated on DRBAG belonged to the genus Aspergillus. Pseudogymnoascus pannorum and species of Talaromyces were also present in higher numbers in mound soils. Species of Penicillium were more abundant in non-nest soils, where they accounted for over 66% of isolates on DRBA. All Aspergillaceae assessed for xerotolerance on a medium augmented with glycerol or sucrose were xerophilic. These results, and our observation that the nests of F. obscuripes are low-water environments, indicate that water availability influences the structure of the fungal communities in these animal-modified habitats. [ABSTRACT FROM AUTHOR]

The research on endophytes is focused on understanding the complex microbiome compositions, their interactions with host plants and their bioactive potential. Our study provided an overview of the diversity, distribution and bioactivities of culturable endophytic fungi associated with fungal endophytes of Dioscorea bulbifera L. The phylogenetic analysis depicted the evolutionary relationship among taxa of endophytic fungal isolates. The isolated fungal endophytes belonged to twenty-five genera and thirty-eight species. Further, diversity indices demonstrated significant diversity of fungal endophytes in the different tissues: stem, leaf, tuber and bulbil. A higher consistency of endophytic fungal isolates in the bulbils was found using Shannon index. Furthermore, Simpson's index revealed that the leaf tissue harboured highly diverse fungal endophytes. Likewise, Margalef's index depicted high taxonomic richness in bulbils. The isolates such as Acrocalymma medicaginis, Curvularia lycoperscii, Talaromyces macrospora, Fusarium laceratum, Paecilomyces formosus and Microascus cirrosus isolated in this study have been reported as endophytes for the first time from any plant. In-vitro antioxidant and antidiabetic activities of the ethyl acetate extracts revealed that Nigrospora oryzae (Z2) effectively inhibited α-glucosidase activity with IC 50 value of 0.6 µg/ml whereas IC 50 value of the acarbose, the positive control was reported to be 0.040 µg/ml. The results of antioxidant activity demonstrated that H15A (Acrocalymma medicaginis) and BD5 (Phomopsis longicolla) could be used as potential sources of antioxidant agents. Moreover, H15A (Acrocalymma medicaginis) was reported to produce 687.1 ± 0.17 µg GAE/mg of TPC and 78.55 ± 0.29 µg QE/mg of TFC quantitatively. These findings suggest that the potential endophytes could be explored using systematic bio-guided investigations to further discover novel natural products. Our study provides an important resource for a deeper understanding of endophyte-plant interactions at molecular and genetic levels. [Display omitted] • First report on the exploration of the culturable fungal endophytes from Dioscorea bulbifera L., an essential ethnomedicinal plant. • The isolated endophytic fungi showed abundant diversity in various tissues of the plant. • Six fungal endophytes obtained in this study have been reported as endophytes for the first time. • Nigrospora oryzae (Z2) exhibited potential α-glucosidase inhibitory activity. • Acrocalymma medicaginis (H15A) could be used as a potential source of antioxidant agents. [ABSTRACT FROM AUTHOR]

Two fungal strains (K-2T and S1) were isolated from the deepest ocean sediment of the Challenger Deep located in the Mariana Trench. The internal transcribed spacer (ITS) gene sequences of the isolates K-2T and S1 differed from those of closely related species, such as Talaromyces assiutensis and T. trachyspermus. Phylogenetic analyses based on single and concatenated alignments of the genes, namely ITS, β-tubulin (benA), calmodulin (cam), and the second-largest subunit fragment of the RNA polymerase II (rpb2) showed that the isolates K-2T and S1 were clustered together with other Talaromyces species, such as T. trachyspermus and T. assiutensis, as evidenced by the position on a terminal branch with high bootstrap support. They could also be distinguished from their closest relatives with valid published names via morphological and physiological characteristics, for example, growth at 4 °C–50 °C with a pH in the range of 1.5–12. Based on their phylogenetic, morphological, and physicochemical properties, the isolates K-2T and S1 represent a novel species in the genus Talaromyces, and the proposed name is Talaromyces sedimenticola sp. nov. The type strain is K-2T (= GDMCC 3.746T = JCM 39451T). [ABSTRACT FROM AUTHOR]

Introduction: Invasive fungal infections affecting the central nervous system (CNS) are a major health concern worldwide associated with high mortality rates. Their increased incidence is largely due to an increase in the vulnerable immunocompromised population, changing environmental factors, and development of more accurate diagnostic methods. The aim of this article is to identify fungal causes of CNS infections that are recently emerging or have the potential to become emerging pathogens in the near future, as well as their clinical characteristics, including: Candida auris, Trichosporon spp., Blastomyces spp., Sporothrix spp., Talaromyces marneffei, Lomentospora prolificans, and Scedosporium spp. Methods: A review of the literature in PubMed in the last ten years was conducted to identify central nervous system infections caused by each of these fungi. Results: The review identified 10 cases caused by C. auris, 5 cases by Trichosporon spp., 82 cases by Blastomyces spp., 36 cases by Sporothrix spp., 21 cases by T. marneffei, 22 cases by Lomentospora prolificans, and 42 cases by Scedosporium spp. Discussion: The exact burden of these diseases remains difficult to ascertain, but their apparent rise underscores the urgent need for improved diagnostic, treatment, and management strategies against CNS fungal pathogens to improve outcomes against these life-threatening infections. [ABSTRACT FROM AUTHOR]

High density polyethylene (HDPE) waste accumulation in the environment is one among the major threats faced globally for the last quarter of century. The current study deals with isolation, characterization and mycodegradation analysis of the HDPE strips by a potential fungus isolated from garbage dump yard. Based on morphological characterization, the isolated strain was identified and designated as Talaromyces liani strain JA2HS. Until now, there have been no reports of HDPE degradation using T. liani. The HDPE strips were subjected to degradation by the fungal isolate JA2HS for 90 days after optimization of growth and environmental parameters. The extent of degradation was confirmed by measuring the weight of the residual strip and the amount of CO2 evolution by Sturm test. A partial 72.7% degradation of the HDPE strip was observed, followed by the evolution of 18.5 g/L CO2. Enzyme studies were conducted to test the presence of ligninolytic enzymes (laccase, manganese peroxidase and lignin peroxidase) responsible for the biodegradation of the plastic strip. The fungal biomass estimation and hydrophobicity test were also performed. Mycodegradation analysis of the HDPE strip was further confirmed using analytical techniques such as FTIR, SEM, and AFM. This is the first study revealing the HDPE degradation using T. liani mediated by ligninolytic enzymes. [ABSTRACT FROM AUTHOR]

In this study, nine endophytic fungi capable of producing multiple phenolic compounds were screened and identified from 152 fungi isolated from pigeon pea in a natural habitat (Honghe, Yunnan Province, China). Talaromyces neorugulosus R-209 exhibited the highest potential for phenolic compound production. L-phenylalanine feeding was used to enhance phenolic compound production in T. neorugulosus R-209 cultures. Under the optimal feeding conditions (l-phenylalanine dose of 0.16 g/L and feeding phase of 6 days), the yields of genistein, apigenin, biochanin A, and cajaninstilbene acid increased by 15.59-fold, 7.20-fold, 25.93-fold, and 10.30-fold over control, respectively. T. neorugulosus R-209 fed with l-phenylalanine was found to be stable in the production of phenolic compounds during ten successive subcultures. Moreover, bioactivities of extracts of T. neorugulosus R-209 cultures were significantly increased by l-phenylalanine feeding. Overall, l-phenylalanine feeding strategy made T. neorugulosus R-209 more attractive as a promising alternative source for the production of health-beneficial phenolic compounds in the nutraceutical/medicinal industries. [ABSTRACT FROM AUTHOR]

Background: Talaromyces species play an important role in the nutrient cycle in natural ecosystems, degradation of vegetal biomass in industries and the implications in medicine. However, the species diversity of this genus is still far from fully understood. Methods: The polyphasic taxonomic approach integrating morphological comparisons and molecular phylogenetic analyses based on BenA, CaM, Rpb2 and ITS sequences was used to propose three new Talaromyces species. Results: Three new species of sect. Talaromyces isolated from soil are proposed, namely, T. disparis (ex-type AS3.26221), T. funiformis (ex-type AS3.26220) and T. jianfengicus (ex-type AS3.26253). T. disparis is unique in low growth rate, velvety texture, limited to moderate sporulation, biverticillate, monoverticillate and irregular penicilli bearing a portion of abnormally large globose conidia, it has no close relatives in phylogeny. Being a member of T. pinophilus complex, T. funiformis produces mycelial funicles on Czapek yeast autolysate agar (CYA), 5% malt extract agar (MEA) and yeast extract (YES), sparse sporulation on Czapek agar (Cz), CYA, MEA and YES while abundant on oatmeal agar (OA), bearing appressed biverticillate penicilli and globose to pyriform conida with smooth to finely rough walls. T. jianfengicus belongs to T. verruculosus complex, is characterized by velvety colony texture with moderate to abundant elm-green conidia en masse, producing biverticillate penicilli, globose conidia with verrucose walls. Conclusion: It is now a common practice in establishing new species of Aspergillus, Penicillium and Talaromyces based on morphological characters and phylogenetic analyses of BenA, CaM, Rpb2 and ITS sequences. The proposal of the three novelties of Talaromyces in this article is not only supported by their morphological distinctiveness, but also confirmed by the phylogenetic analyses of the concatenated BenA-CaM-Rpb2 and BenA-CaM-ITS, as well as the individual BenA, CaM, Rpb2 and ITS sequence matrices. [ABSTRACT FROM AUTHOR]

The first total synthesis of the Australian marine tunicate fungus-derived cyclic peptide talarolide A (1) has confirmed the structure previously proposed on the basis of spectroscopic and chemical analyses and re-affirmed the importance of the unique hydroxamate H-bond bridge in ring conformer stabilization. The unexpected co-synthesis of atrop-talarolide A (8) revealed, for the first time, that hydroxamate H-bond bridging in the talarolide framework invokes non-canonical atropisomerism and that talarolides A (1), C (3), and D (4) all exist naturally as atropisomers. These discoveries raise the intriguing prospect that comparable functionalisation of other cyclic peptides, including those with commercial value, could provide ready access to new "unnatural atropisomeric" chemical space, with new and/or improved chemical and biological properties. [ABSTRACT FROM AUTHOR]

Fungi, known for their diverse metabolic pathways are valuable in synthesizing various bioactive compounds, including nanoparticles. In this study, Talaromyces versatilis was identified based on macroscopic and microscopic observations, showing white mycelia, green conidia, and distinct surface and reverse colouration. Molecular confirmation was achieved through 18S rDNA sequencing, and the sequence (Accession No. PP033495) was added to GenBank. Copper sulfate was utilized as a precursor to synthesize copper oxide nanoparticles (CuONPs) via fungal extracellular enzyme activation. The nanoparticles were characterized using a combination of techniques, including UV-Vis spectroscopy, FTIR analysis, SEM imaging, EDX analysis and Zeta potential measurement for comprehensive evaluation. UV-Vis spectrum exhibited surface plasmon resonance at 250-300 nm, while FTIR analysis revealed functional groups, such as N-H stretching and C-H vibrations. SEM demonstrated spherical CuONPs ranging in size from 80 to 90 nm, and EDX verified that the nanoparticles included carbon, oxygen and copper. The zeta potential, measured at -28 mV, indicated good stability. The CuONPs displayed potent antibacterial efficaciousness against bacteria classified as Gram-negative, including Proteus mirabilis, Serratia marcescens, Escherichia coli, Enterobacter cloacae, Klebsiella pneumoniae and Pseudomonas aeruginosa. Maximum zones of inhibition were observed against Escherichia coli (22 ± 0.12 mm) and Pseudomonas aeruginosa (21 ± 0.32 mm), demonstrating the potential of fungal-synthesized CuONPs as antibacterial agents. Future studies should focus on optimizing the synthesis of CuONPs through fungal pathways, exploring their broader antimicrobial spectrum, and assessing their potential applications in biomedical fields, environmental remediation, and industrial uses. [ABSTRACT FROM AUTHOR]

The filamentous fungus Talaromyces liani (Kamyschko) Yilmaz, Frisvad & Samson, 2014, has attracted considerable interest in biotechnology due to its diverse industrial applications and physiological characteristics. However, the mitochondrial genome of T. liani remains uncharacterized. Here, we present the complete mitochondrial genome of T. liani, comprising 38,000 bp with a GC content of 24.61%. This genome includes 15 core protein-coding genes, 4 independent ORFs, 6 intronic ORFs, 26 tRNAs, and 2 rRNA genes. Phylogenetic analysis using Bayesian inference (BI) revealed the evolutionary relationships among 15 fungi from Eurotiales, strongly supporting distinct clades and indicating that T. liani most closely related to T. pinophilus. [ABSTRACT FROM AUTHOR]

Endophytic microorganisms are promising sources for new biocatalysts as they must deal with their host plants' chemicals by developing adaptative strategies, such as enzymatic pathways. As part of our efforts in selecting endophytic strains as biocatalysts, this study describes the screening of endophytic fungi isolated from Handroanthus impetiginosus leaves for selective bioreduction of Acetophenone. The bioreductions were monitored by chiral gas chromatography and conducted to the selection of the endophyte Talaromyces sp. H4 as capable of reducing acetophenone to (S)-1-phenylethanol in excellent conversion and enantiomeric excess rates. The influence of seven parameters on the stereoselective bioreduction of acetophenone by Talaromyces sp. H4 was studied: reaction time, inoculum charge, shaking, pH, temperature, substrate concentration, and co-solvent. The optimal conditions were then used to reduce substituted acetophenones and Acetophenone scale-up, which furnished (S)-1-Phenylethanol in 73% yield and 96% ee. The results highlight the endophytic fungus Talaromyces sp. H4 as an excellent biocatalyst for stereoselective reduction of prochiral carbonyls. [ABSTRACT FROM AUTHOR]

Copyright of Veterinarska Stanica is the property of Croatian Veterinary Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The adverse outcomes of fungal infection in mammalian hosts depend on the complex interactions between the host immune system and pathogen virulenceassociated traits. The main clinical problems arise when the host response is either too weak to effectively eliminate the pathogen or overly aggressive, resulting in host tissue damage rather than protection. This article will highlight current knowledge regarding the virulence attributions and mechanisms involved in the dual-sided role of the host immune system in the immunopathogenesis of the thermally dimorphic fungus Talaromyces marneffei through the lens of the damage response framework (DRF) of microbial pathogenesis model. [ABSTRACT FROM AUTHOR]

Penicillide is the founder product of a class of natural products of fungal origin. Although this compound and its analogues have been identified from taxonomically heterogeneous fungi, they are most frequently and typically reported from the species of Talaromyces and Penicillium. The producing strains have been isolated in various ecological contexts, with a notable proportion of endophytes. The occurrence of penicillides in these plant associates may be indicative of a possible role in defensive mutualism based on their bioactive properties, which are also reviewed in this paper. The interesting finding of penicillides in fruits and seeds of Phyllanthus emblica is introductory to a new ground of investigation in view of assessing whether they are produced by the plant directly or as a result of the biosynthetic capacities of some endophytic associates. [ABSTRACT FROM AUTHOR]

Introduction: Talaromyces marneffei (T. marneffei), a kind of endemic opportunistic pathogen, was previously thought to occur in HIV-positive individuals and non-HIV hosts with impaired immune function. However, the infection of T. marneffei in patient with normal immune function was rarely reported. Case Presentation: We report a case of severe pneumonia caused by T. marneffei in an immunocompetent and HIV-negative patient, which was rapidly confirmed by metagenomics next-generation sequencing (mNGS) and treated successfully. The patient was a previously healthy 63-year-old male, who was admitted to hospital with fever for 11 days, cough and sputum for 1 week, and chest distress for 4 days. The infection of T. marneffei was quickly determined by alveolar lavage under bedside bronchoscope and mNGS test. Results: Patient’s condition improved rapidly after voriconazole treatment, and he was evaluated as a HIV-negative case of T. marneffei infection with normal immune function. This is a sporadic case of T. marneffei in non-endemic areas, and mNGS played a very important role in the treatment of the disease. The patient’s immune function was relatively normal which was rare in clinical practice. [ABSTRACT FROM AUTHOR]

Mycotoxins are secondary fungal metabolites harmful to humans and animals. Patulin (PAT) is a toxin found in different food products but especially in apples and their derivative products. The most common fungi producers of this compound are Aspergillus clavatus and Penicillium expansum. The production of patulin, as other mycotoxins, can be impacted by diverse phenomena such as water and nutrient availability, UV exposure, and the presence of antagonistic organisms. Consequently, gaining a comprehensive understanding of climate and environmental conditions is a crucial step in combating patulin contamination. In this study, moulds were isolated from 40 apple samples collected from seven locations across Hungary: Csenger, Damak, Pallag, Lövőpetri, Nagykálló, and Újfehértó. A total of 183 moulds were morphologically identified, with 67 isolates belonging to the Alternaria, 45 to the Aspergillus, and 13 to the Penicillium groups. The location possessed a higher influence than farming method on the distribution of mould genera. Despite the requirement of higher temperature, Aspergillus species dominated only for the region of Újfehértó with approximately 50% of the isolates belonging to the genus. Four of the seven locations assessed: Csenger, Debrecen-Pallag, Nyírtass and Nagykálló, were dominated by Alternaria species. All isolates belonging to the genera Aspergillus and Penicillium were tested for the presence of the isoepoxidone dehydrogenase (idh) gene, a key player in the patulin metabolic pathway. To guarantee patulin production, this ability was confirmed with TLC assays. The only Aspergillus strain that presented a positive result was the strain Aspergillus clavatus B9/6, originated from the apple cultivar Golden Reinders grown in Debrecen-Pallag by integrated farming. Of the Penicillium isolates only one strain, B10/6, presented a band of the right size (500-600 bp) for the idh gene. Further sequencing of the ITS gene showed that this strain should be classified as Talaromyces pinophilus. The TLC tests confirmed this microorganism as the only patulin producer under the studied conditions for its cluster. [ABSTRACT FROM AUTHOR]

Pineapple Fruitlet Core Rot (FCR) is a fungal disease characterized by a multi-pathogen pathosystem. Recently, Fusarium proliferatum, Fusarium oxysporum, and Talaromyces stollii joined the set of FCR pathogens until then exclusively attributed to Fusarium ananatum. The particularity of FCR relies on the presence of healthy and diseased fruitlets within the same infructescence. The mycobiomes associated with these two types of tissues suggested that disease occurrence might be triggered by or linked to an ecological chemical communication-promoting pathogen(s) development within the fungal community. Interactions between the four recently identified pathogens were deciphered by in vitro pairwise co-culture bioassays. Both fungal growth and mycotoxin production patterns were monitored for 10 days. Results evidenced that Talaromyces stollii was the main fungal antagonist of Fusarium species, reducing by 22% the growth of Fusarium proliferatum. A collapse of beauvericin content was observed when FCR pathogens were cross-challenged while fumonisin concentrations were increased by up to 7-fold. Antagonism between Fusarium species and Talaromyces stollii was supported by the diffusion of a red pigmentation and droplets of red exudate at the mycelium surface. This study revealed that secondary metabolites could shape the fungal pathogenic community of a pineapple fruitlet and contribute to virulence promoting FCR establishment. [ABSTRACT FROM AUTHOR]

The persistence and ubiquity of polycyclic aromatic hydrocarbons (PAHs) in the environment necessitate effective remediation strategies. Hence, this study investigated the potential of purified Laccases, TlFLU1L and TpFLU12L, from two indigenous fungi Trichoderma lixii FLU1 (TlFLU1) and Talaromyces pinophilus FLU12 (TpFLU12), respectively for the oxidation and detoxification of anthracene. Anthracene was degraded with vmax values of 3.51 ± 0.06 mg/L/h and 3.44 ± 0.06 mg/L/h, and Km values of 173.2 ± 0.06 mg/L and 73.3 ± 0.07 mg/L by TlFLU1L and TpFLU12L, respectively. The addition of a mediator compound 2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) to the reaction system significantly increased the degradation of anthracene, with up to a 2.9-fold increase in vmax value and up to threefold decrease in Km values of TlFLU1L and TpFLU12L. The GC–MS analysis of the metabolites suggests that anthracene degradation follows one new pathway unique to the ABTS system—hydroxylation and carboxylation of C-1 and C-2 position of anthracene to form 3-hydroxy-2-naphthoic acid, before undergoing dioxygenation and side chain removal to form chromone which was later converted into benzoic acid and CO2. This pathway contrasts with the common dioxygenation route observed in the free Laccase system, which is observed in the second degradation pathways. Furthermore, toxicity tests using V. parahaemolyticus and HT-22 cells, respectively, demonstrated the non-toxic nature of Laccase-ABTS-mediated metabolites. Intriguingly, analysis of the expression level of Alzheimer's related genes in HT-22 cells exposed to degradation products revealed no induction of neurotoxicity unlike untreated cells. These findings propose a paradigm shift for bioremediation by highlighting the Laccase-ABTS system as a promising green technology due to its efficiency with the discovery of a potentially less harmful degradation pathway, and the production of non-toxic metabolites. [ABSTRACT FROM AUTHOR]

The soil-derived fungus Talaromyces thailandensis PSU-SPSF059 produced one new vermistatin derivative, talarostatin, and seven known compounds including two vermistatins, two chrodrimanins, two diphenyl ethers and one penicillide derivative. Extensive spectroscopic analysis was performed to identify their structures. The absolute configuration of talarostatin was determined by comparing the experimental and calculated electronic circular dichroism data. The antimicrobial and cytotoxic activities of the isolated secondary metabolites were also evaluated. [ABSTRACT FROM AUTHOR]

Objective To identify and analyze the phospholipase A (PLA) gene family in Talaromyces marneffei (T. marneffei), providing the basis for further research on the potential pathogenic effect and mechanism of T. marneffei PLA. Methods The members of the PLA gene family in T. marneffei were genome-wide identified by using bioinformatics, and their gene structure, chromosome distribution, protein physicochemical property and structure, conserved motif, as well as phyletic evolution, were analyzed. The expression levels of PLA genes in T. marneffei under macrophage treatment were analyzed using the qRT-PCR method. Results A total of eight PLA genes were identified from the genome of T. marneffei, unevenly located on 5 chromosomes without any tandem duplications or fragment duplications. The amino acid residues of PLA proteins ranged from 577 to 1546, molecular weights from 65 120 to 170 690, and the isoelectric point from 4.47 to 9.28. All PLA proteins were hydrophilic, with all but PLA3 classified as unstable hydrophilic proteins. Phylogenetic analysis revealed that PLA was divided into two subfamilies: PLA2 and patatin-like phospholipase, consisting of 3 and 5 members respectively. Within the same subfamily, gene structures, protein-conserved motifs, and protein structures were relatively similar, whereas significant differences existed between different subfamilies. qRT PCR results showed that the expression levels of PLA3, PLA6, and PLA8 were upregulated in T. marneffei infected with mouse macrophages. Conclusions PLA3, PLA6, and PLA8 may be related to the survival and reproduction of T. marneffei in macrophages. [ABSTRACT FROM AUTHOR]

Background: Alternaria alternata is the primary pathogen of potato leaf spot disease, resulting in significant potato yield losses globally. Endophytic microorganism-based biological control, especially using microorganisms from host plants, has emerged as a promising and eco-friendly approach for managing plant diseases. Therefore, this study aimed to isolate, identify and characterize the endophytic fungi from healthy potato leaves which had great antifungal activity to the potato leaf spot pathogen of A. alternata in vitro and in vivo. Results: An endophytic fungal strain SD1-4 was isolated from healthy potato leaves and was identified as Talaromyces muroii through morphological and sequencing analysis. The strain SD1-4 exhibited potent antifungal activity against the potato leaf spot pathogen A. alternata Lill, with a hyphal inhibition rate of 69.19%. Microscopic and scanning electron microscope observations revealed that the strain SD1-4 grew parallel to, coiled around, shrunk and deformed the mycelia of A. alternata Lill. Additionally, the enzyme activities of chitinase and β-1, 3-glucanase significantly increased in the hyphae of A. alternata Lill when co-cultured with the strain SD1-4, indicating severe impairment of the cell wall function of A. alternata Lill. Furthermore, the mycelial growth and conidial germination of A. alternata Lill were significantly suppressed by the aseptic filtrate of the strain SD1-4, with inhibition rates of 79.00% and 80.67%, respectively. Decrease of leaf spot disease index from 78.36 to 37.03 was also observed in potato plants treated with the strain SD1-4, along with the significantly increased plant growth characters including plant height, root length, fresh weight, dry weight, chlorophyll content and photosynthetic rate of potato seedlings. Conclusion: The endophyte fungus of T. muroii SD1-4 isolated from healthy potato leaves in the present study showed high biocontrol potential against potato leaf spot disease caused by A. alternata via direct parasitism or antifungal metabolites, and had positive roles in promoting potato plant growth. [ABSTRACT FROM AUTHOR]

Purpose: Metagenomic next-generation sequencing (mNGS) has been widely used in the diagnosis of infectious diseases. However, studies on Talaromyces marneffei detection using mNGS remain scarce. Therefore, this study aimed to explore the diagnostic performance of mNGS in T. marneffei. Methods: Between March 2021 and June 2023, patients who were discharged with a final diagnosis of talaromycosis, or confirmed T. marneffei infection by mNGS, culture or pathological examination were included in the study. Culture and mNGS were performed simultaneously for all patients. Clinical data were retrieved for analysis. Results: A total of 78 patients were enrolled, with 40 in the talaromycosis group and 38 in the suspected-talaromycosis group. In the talaromycosis group, mNGS showed a higher positivity rate(40/40, 100.0%) compared to culture(34/40, 85.0%)(P = 0.111). All patients in the suspected-talaromycosis group tested negative via culture, while mNGS yielded positive results. The T. marneffei reads in the talaromycosis group were significantly higher than in the suspected-talaromycosis group (4399 vs. 28, P < 0.001). In the suspected-talaromycosis group, of the four patients with low reads who did not receive antifungal therapy, one died and one lung lesion progressed; most patients(31/34, 91.2%) recovered after receiving appropriate antifungal therapy. Conclusion: mNGS proves to be a rapid and highly sensitive method for detecting T. marneffei. Higher reads of T. marneffei correspond to a higher likelihood of infection. However, cases with low reads necessitate a comprehensive approach, integrating clinical manifestations, laboratory tests, and imaging examinations to confirm T. marneffei infection. [ABSTRACT FROM AUTHOR]

[Objectives] The aim of this study was to investigate the differences of endophytic fungal community characteristics between healthy and root rot-diseased Panax notoginseng, as well as the distribution pattern in different plant tissues and their changes with growth years. [Methods] 1-year-old and 2-year-old of healthy and root rot-diseased P. notoginseng were randomly collected and the endophytic fungi in their roots and stems were isolated by tissue isolation method. Based on morphological characteristics and ITS sequence analysis, the isolated strains were classified and identified, and the community composition and diversity of endophytic fungal community were analyzed. [Results] A total of 966 endophytic fungi strains were isolated and identified, which belonged to 3 phyla, 5 classes, 14 orders, 25 families and 31 genera. The number and isolation rate of endophytic isolates were as follows: diseased plant> healthy plant, 2-year-old P. notoginseng >1-year-old P. notoginseng, root>stem. The composition of the culturable endophytic fungi in healthy and root rot-diseased P. notoginseng was quite different, of which the genus Aspergillus, Irpex, Chaetomium, and Penicillium were the dominant endophytic fungi in the healthy P. notoginseng, while the predominant culturable endophytic fungi of root rot-diseased P. notoginseng were Fusarium, Aspergillus, Talaromyces, Chaetomium, and Trichoderma. The composition and diversity of endophytic fungi of P. notoginseng was significantly affected by plant tissues. Specially, the isolation frequency of genus Fusarium from roots of root rot-diseased P. notoginseng was 52%, which was significantly higher than that from the stems of 11.2%. Beneficial fungi such as Trichoderma and Talaromyces were also frequently isolated from diseased roots, with the isolation frequencies of 11.0% and 14.5%, respectively. Moreover, the diversity, richness, and evenness of endophytic fungal community in stems of P. notoginseng were higher than those in roots. With the increase of growth years, the composition and diversity of endophytic fungal community of healthy and root rot- diseased P. notoginseng also changed, and the isolation frequency of Fusarium oxysporum and F. solani in diseased P. notoginseng increased greatly, reaching 14.5% and 32.9%, respectively. Furthermore, the diversity, richness, and evenness of endophytic fungal community in healthy P. notoginseng increased gradually with growth year, while the diversity and evenness of endophytic fungal community in root rot-diseased P. notoginseng were gradually declined. [Conclusions] P. notoginseng harbored a rich diversity of endophytic fungi and its colonization quantity and community composition were significantly distinct between healthy and root rot- diseased plants. Moreover, plant tissues and growth ages also significantly affected the diversity and composition of endophytic fungal community. [ABSTRACT FROM AUTHOR]

Key Clinical Message: In addition to post‐transplant lymphoproliferative disorders, it is necessary to be alert to the drug‐resistant bacteria or fungal infection, especially Talaromyces marneffei, in kidney transplant patients who have failed antibiotic treatment and whose PET‐CT indicates high metabolic mass in the transplanted kidney with a large number of other organs and lymph nodes. Talaromyces marneffei (TM) is a rare pathogenic fungus that primarily affects individuals with compromised immune systems. Post‐transplant lymphoproliferative disorders (PTLD) are serious complications that can occur after solid organ and cell transplantation. Both TM infection and PTLD can invade the monocyte–macrophage system and often manifest as extranodal masses. This case report describes a kidney transplant patient who presented with symptoms of frequent, urgent, and painful urination over 6 months. Pulmonary CT scans revealed multiple nodules, and PET‐CT demonstrated enlarged lymph nodes in the lungs and the transplanted kidney. The clinical manifestations closely mimicked those of PTLD. The confirmation of TM was achieved through pathogen metagenomic next‐generation sequencing and renal biopsy. Unfortunately, despite receiving treatment with antifungal agents, anti‐infective therapy, the patient's condition did not respond favorably, ultimately resulting in their unfortunate demise due to COVID‐19. [ABSTRACT FROM AUTHOR]

Abstract Background Talaromyces Marneffei (TM) is a rare opportunistic pathogen that mostly infects patients with low immunity compared to those with normal immunity. It may be related to immune deficiency or genetic factors. Objective To evaluate the gene mutation of a patient infected with TM in an endemic area with negative anti-interferon-γ autoantibodies, and negative human immunodeficiency virus (HIV) infection. Methods Extract deoxyribonucleic acid (DNA) samples from the patient's peripheral blood, detect the mutation gene by whole exome sequencing (WES), and carry out Sanger sequencing verification for the detected mutation gene. Results The authors detected a mutation in the IFNGR1 gene (NM_001363526.1) and validated the detected gene mutation using Sanger sequencing. The results showed a heterozygous mutation c.4C>T (p.L2F) located in the IFNGR1 gene (NM_001363526.1). Study limitations The mechanism of the IFNGR1 gene has not been further investigated in this study. Conclusions The IFNGR1 gene mutation may be a potential risk factor for TM infection, and the presence of anti-interferon-γ autoantibodies can aggravate disease symptoms.

The respiratory tree maintains sterilizing immunity against human fungal pathogens. Humans inhale ubiquitous filamentous molds and geographically restricted dimorphic fungal pathogens that form small airborne conidia. In addition, pathogenic yeasts, exemplified by encapsulated Cryptococcus species, and Pneumocystis pose significant fungal threats to the lung. Classically, fungal pneumonia occurs in immune compromised individuals, specifically in patients with HIV/AIDS, in patients with hematologic malignancies, in organ transplant recipients, and in patients treated with corticosteroids and targeted biologics that impair fungal immune surveillance in the lung. The emergence of fungal co-infections during severe influenza and COVID-19 underscores the impairment of fungus-specific host defense pathways in the lung by respiratory viruses and by medical therapies to treat viral infections. Beyond life-threatening invasive syndromes, fungal antigen exposure can exacerbate allergenic disease in the lung. In this review, we discuss emerging principles of lung-specific antifungal immunity, integrate the contributions and cooperation of lung epithelial, innate immune, and adaptive immune cells to mucosal barrier immunity, and highlight the pathogenesis of fungal-associated allergenic disease. Improved understanding of fungus-specific immunity in the respiratory tree has paved the way to develop improved diagnostic, pre-emptive, therapeutic, and vaccine approaches for fungal diseases of the lung.

Five new diterpenes including four diterpenes with 1,2,3,4,4a,5,6,8a-octalin skeleton talaroacids A–D (1–4) and an isopimarane diterpenoid talaromarane A (5) were isolated from the mangrove endophytic fungus Talaromyces sp. JNQQJ-4. Their structures and absolute configurations were determined by analysis of high-resolution electrospray ionization mass spectroscopy (HRESIMS), 1D/2D Nuclear Magnetic Resonance (NMR) spectra, single-crystal X-ray diffraction, quantum chemical calculation, and electronic circular dichroism (ECD). Talaromarane A (5) contains a rare 2-oxabicyclo [3.2.1] octan moiety in isopimarane diterpenoids. In bioassays, compounds 1, 2, 4, and 5 displayed significant anti-inflammatory activities with the IC50 value from 4.59 to 21.60 μM. [ABSTRACT FROM AUTHOR]

Broad-spectrum biocatalysts enzymes, Laccases, have been implicated in the complete degradation of harmful pollutants into less-toxic compounds. In this study, two extracellularly produced Laccases were purified to homogeneity from two different Ascomycetes spp. Trichoderma lixii FLU1 (TlFLU1) and Talaromyces pinophilus FLU12 (TpFLU12). The purified enzymes are monomeric units, with a molecular mass of 44 kDa and 68.7 kDa for TlFLU1 and TpFLU12, respectively, on SDS-PAGE and zymogram. It reveals distinct properties beyond classic protein absorption at 270–280 nm, with TlFLU1's peak at 270 nm aligning with this typical range of type II Cu site (white Laccase), while TpFLU12's unique 600 nm peak signifies a type I Cu2+ site (blue Laccase), highlighting the diverse spectral fingerprints within the Laccase family. The Km and kcat values revealed that ABTS is the most suitable substrate as compared to 2,6-dimethoxyphenol, caffeic acid and guaiacol for both Laccases. The bioinformatics analysis revealed critical His, Ile, and Arg residues for copper binding at active sites, deviating from the traditional two His and a Cys motif in some Laccases. The predicted biological functions of the Laccases include oxidation–reduction, lignin metabolism, cellular metal ion homeostasis, phenylpropanoid catabolism, aromatic compound metabolism, cellulose metabolism, and biological adhesion. Additionally, investigation of degradation of polycyclic aromatic hydrocarbons (PAHs) by purified Laccases show significant reductions in residual concentrations of fluoranthene and anthracene after a 96-h incubation period. TlFLU1 Laccase achieved 39.0% and 44.9% transformation of fluoranthene and anthracene, respectively, while TpFLU12 Laccase achieved 47.2% and 50.0% transformation, respectively. The enzyme structure–function relationship study provided insights into the catalytic mechanism of these Laccases for possible biotechnological and industrial applications. [ABSTRACT FROM AUTHOR]

The biodeterioration of archaeological mummies is a severe issue, where fungi are the most significant agents deteriorating them. The inhibitory effect of [1,2,4]triazolo[3,4-a]isoquinoline chalcone derivatives on the growth of thirteen deteriorated fungal species (Aspergillus flavus, A. niger, A. terreus, Athelia bombacina, Aureobasidium iranianum, Byssochlamys spectabilis, Cladosporium cladosporioides, C. ramotenellum, Penicillium crustosum, P. polonicum, Talaromyces atroroseus, T. minioluteus, and T. purpureogenus), which isolated and identified from ancient Egyptian mummy cartonnage located in El-Lahun regions, Fayoum government, Egypt were investigated. Antifungal activity and minimal inhibitory concentration (MIC) of the tested four chalcone derivatives with different concentrations (1, 2, 3, 4, 5, 6 mg/ml) were measured. The most efficient chalcone derivatives are chalcone derivative number 4 which causes the maximum significant inhibition in the growth of the thirteen isolated fungal species with MIC ranging from 1 to 3 mg/ml followed by chalcone derivatives number 6 with MIC ranging from 2 to 5 mg/ml. The use of chalcone derivative number 4 for the preservation of cultural assets should be considered for future applications. [ABSTRACT FROM AUTHOR]

Background: Anthracnose disease of chili caused by Colletotrichum spp is one of the most destructive diseases affecting chili fruits in Thailand and significantly reduces fruit quality and chili production. Currently, this disease is managed primarily with synthetic fungicides that may affect public health and the environment adversely. Consequently, there is a need for biological management options. In vitro and in vivo evaluations of the antagonistic activity of Talaromyces flavus Bodhi001, Talaromyces trachyspermus Bodhi002, Talaromyces flavus Bodhi003 and Neosartorya fischeri Bodhi004 against Colletotrichum capsici, the causal agent of chili anthracnose disease, were conducted in the present study. Methods: The activity of antagonistic fungi against C. capsici was determined using PDA plate by dual culture method. The spore suspensions of C. capsici and antagonistic fungi were prepared in sterile water and adjusted using a hemocytometer to achieve a final concentration of about 106 spores mL-1. Result: The most effective antagonistic strains were T. flavus Bodhi001 and N. fischeri Bodhi004, which inhibited the mycelial growth of C. capsici by 68.99% and 70.76%, respectively. Interestingly, the antagonistic T. flavus Bodhi001 strain was the most effective at reducing the severity of chili anthracnose in vivo by up to 80%. The biological control activity of T. flavus Bodhi001 was to produce antibiosis against C. capsici; therefore, testing can be recommended to confirm its field trial stability. The results indicate that the application of the antagonistic fungi T. flavus Bodhi001 may be quite effective in biological control of chili anthracnose. [ABSTRACT FROM AUTHOR]

Talaromyces, a filamentous fungus widely distributed across terrestrial and marine environments, can produce a diverse array of natural products, including alkaloids, polyketones, and polyketide-terpenoids. Among these, chrodrimanins represented a typical class of natural products. In this study, we isolated three previously undescribed pentaketide-sesquiterpenes, 8,9-epi-chrodrimanins (1–3), along with eight known compounds (4–11). The structures of compounds 1–3 were elucidated using nuclear magnetic resonance (NMR) and mass spectrometry (MS), while their absolute configurations were determined through X-ray crystallography and electronic circular dichroism (ECD) computations. The biosynthetic pathways of compounds 1–3 initiate with 6-hydroxymellein and involve multiple stages of isoprenylation, cyclization, oxidation, and acetylation. We selected four strains of gastrointestinal cancer cells for activity evaluation. We found that compound 3 selectively inhibited MKN-45, whereas compounds 1 and 2 exhibited no significant inhibitory activity against the four cell lines. These findings suggested that 8,9-epi-chrodrimanins could serve as scaffold compounds for further structural modifications, potentially leading to the development of targeted therapies for gastric cancer. [ABSTRACT FROM AUTHOR]

Introduction: Systemic dimorphic fungi pose a significant public health challenge, causing over one million new infections annually. The dimorphic transition between saprophytic mycelia and pathogenic yeasts is strongly associated with the pathogenesis of dimorphic fungi. However, despite the dynamic nature of dimorphic transition, the current omics studies focused on dimorphic transition primarily employ static strategies, partly due to the lack of suitable dynamic analytical methods. Methods: We conducted time-course transcriptional profiling during the dimorphic transition of Talaromyces marne [ABSTRACT FROM AUTHOR]

Background: The incidence of Talaromyces marneffei (T. marneffei) infection has increased in recent years with the development of organ transplantation and the widespread use of immunosuppressive agents. However, the lack of clinical suspicion leading to delay or misdiagnosis is an important reason for the high mortality rate in non-human immunodeficiency virus (HIV) and non-endemic population. Herein, we report a case of disseminated T. marneffei infection in a non-HIV and non-endemic recipient after renal transplant, who initially presented with skin rashes and subcutaneous nodules and developed gastrointestinal bleeding. Case presentation: We describe a 54-year-old renal transplantation recipient presented with scattered rashes, subcutaneous nodules and ulcerations on the head, face, abdomen, and right upper limb. The HIV antibody test was negative. The patient had no obvious symptoms such as fever, cough, etc. Histopathological result of the skin lesion sites showed chronic suppurative inflammation with a large number of fungal spores. Subsequent fungal culture suggested T. marneffei infection. Amphotericin B deoxycholate was given for antifungal treatment, and there was no deterioration in the parameters of liver and kidney function. Unfortunately, the patient was soon diagnosed with gastrointestinal bleeding, gastrointestinal perforation and acute peritonitis. Then he rapidly developed multiple organ dysfunction syndrome and abandoned treatment. Conclusions: The risk of fatal gastrointestinal bleeding can be significantly increased in kidney transplant patients with T. marneffei infection because of the long-term side effects of post-transplant medications. Strengthening clinical awareness and using mNGS or mass spectrometry technologies to improve the detection rate and early diagnosis of T. marneffei are crucial for clinical treatment in non-HIV and non-endemic population. [ABSTRACT FROM AUTHOR]

Talaromyces sp. DC2 is an endophytic fungus that was isolated from the stem of Catharanthus roseus (L.) G. Don in Hanoi, Vietnam and is capable of producing vinca alkaloids. This study utilizes the PacBio Sequel technology to completely sequence the whole genome of Talaromyces sp. DC2The genome study revealed that DC2 contains a total of 34.58 Mb spanned by 156 contigs, with a GC content of 46.5%. The identification and prediction of functional protein-coding genes, tRNA, and rRNA were comprehensively predicted and highly annotated using various BLAST databases, including non-redundant (Nr) protein sequence, Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), Clusters of Orthologous Groups (COG), and Carbohydrate-Active Enzymes (CAZy) databases. The genome of DC2 has a total of 149, 227, 65, 153, 53, and 6 genes responsible for cellulose, hemicellulose, lignin, pectin, chitin, starch, and inulin degradation, respectively. The Antibiotics and Secondary Metabolites Analysis Shell (AntiSMASH) analyses revealed that strain DC2 possesses 20 biosynthetic gene clusters responsible for producing secondary metabolites. The strain DC2 has also been found to harbor the DDC gene encoding aromatic L-amino acid decarboxylase enzyme. Conclusively, this study has provided a comprehensive understanding of the processes involved in secondary metabolites and the ability of the Talaromyces sp. DC2 strain to degrade plant cell walls. [ABSTRACT FROM AUTHOR]

Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the efficacy of ROVABIO® ADVANCE (liquid and solid) which contains endo‐1,4‐beta‐xylanase and endo‐1,3(4)‐beta‐glucanase produced with Talaromyces versatilis IMI 378536 and DSM 26702 as a zootechnical feed additive for weaned piglets at the recommended use level of 1800 U xylanase and 1250 U glucanase per kg feed. In a previous assessment, three long‐term trials in weaned piglets were submitted. Two of them were considered to support the efficacy of the additive while a third trial was not further considered due to the large number of veterinary treatments applied. A new trial was provided to support the efficacy of the additive, but it did not show a significant improvement of the performance parameters at the minimum recommended use level. Due to the lack of sufficient data, the FEEDAP Panel is not in the position to conclude on the efficacy of the additive for the target species. [ABSTRACT FROM AUTHOR]

The identification of more efficient, clean, secure, and competitive energy supply is necessary to align with the needs of sustainable devices. For this reason, a study for developing innovative dye-sensitized solar cells (DSSCs) based on microbial pigments is reported starting from Talaromyces atroroseus GH2. The fungus was cultivated by fermentation and the extracellular pigment extract was characterized by HPLC-DAD-ESI-MS analyses. The most abundant compound among the 22 azaphilone-type pigments identified was represented by PP-O. The device's behavior was investigated in relation to electrolyte and pH for verifying the stability on time and the photovoltaic performance. Devices obtained were characterized by UV–vis measurements to verify the absorbance intensity and transmittance percentage. Moreover, photovoltaic parameters through photo-electrochemical measurements (I–V curves) and impedance characteristics by Electrochemical Impedance Spectroscopy (EIS) were determined. The best microbial device showed a short-circuit current density (Jsc) of 0.69 mA/cm2, an open-circuit photo-voltage (Voc) of 0.27 V and a Fill Factor (FF) of 0.60. Furthermore, the power conversion efficiency (PCE) of the device was 0.11%. Thus, the present study demonstrated the potential of microbial origin pigments for developing DSSCs. [ABSTRACT FROM AUTHOR]

Talaromycosis is a fungal infection caused by Talaromyces marneffei. The infection was formerly known as penicilliosis. It is the only penicillin species with a dimorphic character and causes systemic mycosis infections in humans. This infection commonly happens in immunocompromised individuals, especially those who are infected with human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) or any other immunodeficiency state. The symptoms associated with T. marneffei include fever, weight loss, cough, breathing difficulty, abdominal pain, diarrhea, swollen lymph nodes, and general discomfort. The clinical manifestations impacted by T. marneffei can vary from mild skin lesions to circulatory collapse or respiratory failure. The lungs, liver, and mouth are frequently impacted by talaromycosis in persons who do not have HIV, while it can occasionally spread through the blood and affect the entire body. Here is a case of 70-year-old female patient who had a history of rheumatoid arthritis on steroids, diabetes and hypertension with a recent past history of community-acquired pneumonia treated with intravenous antibiotics from a local hospital. Despite being on appropriate broadspectrum antibiotics, her condition deteriorated, and she was referred here. On admission, she was in sepsis, and she remained sick in spite of being on carbapenems and azithromycin. As she was an immunocompromised host, partial response to initial empiric therapy was considered early transbronchial lung biopsy, which revealed T. marneffei species. She was started on itraconazole oral therapy, to which she responded well and was later discharged. Unfortunately, she got re-admitted on the 25th day with type 1 respiratory failure and shock. The possibility of hospital-acquired infection was considered, and all higher antibiotics, including polymyxin and vancomycin, were initiated in addition to itraconazole therapy and plain amphotericin B as an add-on antifungal therapy; could not revive the patient, and she passed away. This case demonstrates the possibility of T. marneffei infection in any immunocompromised host rather than the fact of its occurrence only in HIV patients and the high mortality associated with it even with reasonable good critical care support. [ABSTRACT FROM AUTHOR]

Verbenone is a natural monoterpene present as an essential component in rosemary oil from Rosmarinus officinalis, Verbena triphylla and Eucalyptus globule. Microbial biotransformation of monoterpenoids to value-added products has immense industrial potential. This study involves the biotransformation of (-)-verbenone to (-)-10-hydroxyverbenone by a fungus i.e. Talaromyces purpurogenus strain MRS-F13 in fermentation broth during the exponential phase. Biotransformation reaction has been successfully demonstrated at 15 L scale in the bioreactor with 70% conversion within 96 h. The anti-inflammatory activity investigations revealed that (-)-verbenone and its biotransformed product exhibited moderate inhibition of TNF-α and nitric oxide, whereas (-)-10-hydroxyverbenone presented an improved anti-oxidant activity. Talaromyces purpurogenus catalysed biotransformation of (-)-verbenone to (-)-10-hydroxyverbenone has been demonstrated. Approximately 70% bioconversion was obtained in 96 h in submerged culture at 15L bioreactor scale. Biotransformed product (-)-10-hydroxyverbenone has shown improved anti-inflammatory activity without cytotoxicity. [ABSTRACT FROM AUTHOR]

Three novel meroterpenoids, taladrimanins B–D (1–3), were isolated from the marine-derived fungus Talaromyces sp. M27416, alongside three biogenetically related compounds (4–6). We delineated taladrimanin B's (1) structure using HRESIMS and NMR, confirmed its configuration via quantum chemical NMR analysis and DP4+ methodology, and verified it through X-ray crystallography. ECD calculations determined the absolute configuration of compound 1, while comparative NMR and ECD analyses elucidated the absolute configurations of 2 and 3. These compounds are drimane-type meroterpenoids with a C10 polyketide unit (8R-configuration). We proposed a biosynthetic pathway and noted that compound 1 showed cytotoxic activity against MKN-45 and 5637 cell lines and selective antibacterial effects against Staphylococcus aureus CICC 10384. [ABSTRACT FROM AUTHOR]

Copyright of Egyptian Journal of Botany is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Talaromyces marneffei (TM) is the third most prevalent opportunistic infection in HIV-positive patients after tuberculosis and cryptococcosis. However, such infection of non-HIV individuals has rarely been reported. Case Presentation: We describe a very rare case of a 52-year-old male who presented with a single space-occupying lesion on the right lung and was eventually diagnosed with pulmonary TM infection. The patient was HIV-negative and had liver cirrhosis with portal vein thrombosis. Lung tissue next-generation sequencing (NGS) revealed TM infection. We successfully treated the patient with voriconazole for 8 weeks and observed lesion absorption via subsequent CT. The patient consumed wild bamboo rats two months before admission. Mutations related to congenital immune deficiency were not detected by whole-exome sequencing. Conclusion: Early and timely diagnosis is critical for improving patient prognosis. NGS plays a vital role in the diagnosis of pulmonary TM infection in patients. To our knowledge, this is the first published case of pulmonary TM infection in an HIV-negative patient with liver cirrhosis. [ABSTRACT FROM AUTHOR]

In the Kandi zone of Punjab, India, root and rhizospheric soil samples were collected from the local vegetation near the Shivalik mountain foothills. Fifteen fungal colonies exhibiting distinct cultural morphology on Potato Dextrose Agar (PDA) plates were selected for plant–microbe interaction studies. Among these, the isolate HNB9 was identified as a nonpathogenic root colonizer. Morphological and molecular analyses confirmed HNB9 as Talaromyces albobiverticillius, characterized by the secretion of a red pigment as a secondary metabolite. Plants colonized with T. albobiverticillius HNB9 exhibited enhanced growth, manifesting in increased shoot and root length compared to untreated controls. This study unveiled the first evidence that a species from the Talaromyces genus, specifically T. albobiverticillius, possesses dual capabilities of root colonization and plant growth promotion. Moreover, HNB9 demonstrated the production of plant growth-regulating compounds like Indole Acetic Acid (IAA) and proficient solubilization of crucial nutrients (Phosphorous, Zinc, and Silica) through plate culture methods. This finding represents a significant contribution to the understanding of root-colonizing fungi with plant growth-promoting attributes, challenging the existing knowledge gap within the Talaromyces genus. [ABSTRACT FROM AUTHOR]

Background Geographically endemic fungi can cause significant disease among solid organ transplant (SOT) recipients. We provide an update on the epidemiology, clinical presentation, and outcomes of 5 endemic mycoses in SOT recipients. Methods Multiple databases were reviewed from inception through May 2023 using key words for endemic fungi (eg, coccidioidomycosis or Coccidioides, histoplasmosis or Histoplasma, etc). We included adult SOT recipients and publications in English or with English translation. Results Among 16 cohort studies that reported on blastomycosis (n = 3), coccidioidomycosis (n = 5), histoplasmosis (n = 4), and various endemic mycoses (n = 4), the incidence rates varied, as follows: coccidioidomycosis, 1.2%–5.8%; blastomycosis, 0.14%–0.99%; and histoplasmosis, 0.4%–1.1%. There were 204 reports describing 268 unique cases of endemic mycoses, including 172 histoplasmosis, 31 blastomycosis, 34 coccidioidomycosis, 6 paracoccidioidomycosis, and 25 talaromycosis cases. The majority of patients were male (176 of 261 [67.4%]). Transplanted allografts were mostly kidney (192 of 268 [71.6%]), followed by liver (n = 39 [14.6%]), heart (n = 18 [6.7%]), lung (n = 13 [4.9%]), and combined kidney-liver and kidney-pancreas (n = 6 [2.7%]). In all 5 endemic mycoses, most patients presented with fever (162 of 232 [69.8%]) and disseminated disease (179 of 268 [66.8%]). Cytopenias were frequently reported for histoplasmosis (71 of 91 [78.0%]), coccidioidomycosis (8 of 11 [72.7%]) and talaromycosis (7 of 8 [87.5%]). Graft loss was reported in 12 of 136 patients (8.8%). Death from all-causes was reported in 71 of 267 (26.6%); half of the deaths (n = 34 [50%]) were related to the underlying mycoses. Conclusions Endemic mycoses commonly present with fever, cytopenias and disseminated disease in SOT recipients. There is a relatively high all-cause mortality rate, including many deaths that were attributed to endemic mycoses. [ABSTRACT FROM AUTHOR]

The dynamic of plant-parasitic nematode populations in soil is closely related to soil microorganisms. Fungi from Heterodera zeae cysts were isolated to explore the phenomenon of decline in the H. zeae population in the soil. Phylogenetic study of partial ITS, BenA, CaM, and RPB2 gene sequences, in addition to morphological investigations, was utilized to identify a nematode-destroying fungus. The nematicidal activity of a novel strain GX1 against H. zeae was assessed in vitro and in the greenhouse. Our findings revealed that strain GX1 is a new species of Talaromyces, named Talaromyces cystophila. It has a strong parasitic and lethal effect on H. zeae cysts, with 91.11% parasitism on cysts at 3 days after treatment. The contents of second-stage juveniles (J2s) and eggs inside the cysts were degraded and formed dense vacuoles, and the damaged eggs could not hatch normally. The spore suspension exhibited high nematophagous activity against nematodes, and fermentation filtrate exhibited marked inhibition of egg hatching and nematicidal activities on J2s. The hatching inhibition rates of eggs exposed to 1 × 108 CFU/ml spore suspensions or 20% 1-week fermentation filtrate (1-WF) for 15 days were 98.56 and 100%, respectively. The mortality of J2s exposed to 1 × 108 CFU/ml spore suspension reached 100% at 24 h; exposure to 50% 2-WF was 98.65 and 100% at 24 and 48 h, respectively. Greenhouse experiments revealed that the spore suspension and fermentation broth considerably decreased H. zeae reproduction by 56.17 to 78.76%. T. cystophila is a potential biocontrol strain with nematophagous and nematicidal activity that deserves attention and application. [ABSTRACT FROM AUTHOR]

The order Eurotiales is diverse and includes species that impact our daily lives in many ways. In the past, its taxonomy was difficult due to morphological similarities, which made accurate identification of species difficult. This situation improved and stabilised with recent taxonomic and nomenclatural revisions that modernised Aspergillus, Penicillium and Talaromyces. This was mainly due to the availability of curated accepted species lists and the publication of comprehensive DNA sequence reference datasets. This has also led to a sharp increase in the number of new species described each year with the accepted species lists in turn also needing regular updates. The focus of this study was to review the 160 species described between the last list of accepted species published in 2020 until 31 December 2022. To review these species, single-gene phylogenies were constructed and GCPSR (Genealogical Concordance Phylogenetic Species Recognition) was applied. Multi-gene phylogenetic analyses were performed to further determine the relationships of the newly introduced species. As a result, we accepted 133 species (37 Aspergillus, two Paecilomyces, 59 Penicillium, two Rasamsonia, 32 Talaromyces and one Xerochrysium), synonymised 22, classified four as doubtful and created a new combination for Paraxerochrysium coryli, which is classified in Xerochrysium. This brings the number of accepted species to 453 for Aspergillus, 12 for Paecilomyces, 535 for Penicillium, 14 for Rasamsonia, 203 for Talaromyces and four for Xerochrysium. We accept the newly introduced section Tenues (in Talaromyces), and series Hainanici (in Aspergillus sect. Cavernicolarum) and Vascosobrinhoana (in Penicillium sect. Citrina). In addition, we validate the invalidly described species Aspergillus annui and A. saccharicola, and series Annuorum (in Aspergillus sect. Flavi), introduce a new combination for Dichlaena lentisci (type of the genus) and place it in a new section in Aspergillus subgenus Circumdati, provide an updated description for Rasamsonia oblata, and list excluded and recently synonymised species that were previously accepted. This study represents an important update of the accepted species lists in Eurotiales. [ABSTRACT FROM AUTHOR]

Fruitlet core rot (FCR) is a worldwide fungal disease of pineapple, which occasionally occurs on susceptible cultivars in Taiwan. This study describes the fungal pathogens of FCR and their occurrence in Taiwan for the first time. A total of 51 fungal isolates were obtained from diseased fruitlets and blossom cups of 'TN20', a susceptible cultivar planted in Taiwan. These isolates were identified as the Talaromyces species T. amestolkiae, T. funiculosus, and T. stollii and Fusarium species F. ananatum, F. oxysporum, and F. annulatum based on phylogenetic analyses. All of them have been described as FCR pathogens in other countries, if considering that F. annulatum has often been misidentified as F. proliferatum. To facilitate identification, four pairs of species-specific primers were developed, which enabled rapid identification of T. amestolkiae, T. funiculosus, and T. stollii by multiplex polymerase chain reaction (PCR) and F. ananatum by PCR. Two types of diseased fruitlets, "wet" and "dry", were observed on 'TN20', and T. amestolkiae, T. funiculosus, T. stollii, and F. ananatum could be isolated from both types. In addition, Talaromyces and Fusarium species were isolated from blossom cups at high frequencies, but few fungi were isolated from healthy tissues. The specific primers designed in this study could provide a useful tool to study FCR in the future, and the findings could provide a better understanding of the ecology and epidemiology of FCR. [ABSTRACT FROM AUTHOR]

Background: The recently discovered PcAA14A and B from white-rot basidiomycete Pycnoporus coccineus enriched our understanding of the oxidative degradation of xylan in fungi, however, the unusual mode of action of AA14 LPMOs has sparked controversy. The substrate specificity and functionality of AA14 LPMOs still remain enigmatic and need further investigation. Results: In this study, a novel AA14 LPMO was characterized from the ascomycete Talaromyces rugulosus. TrAA14A has a broad substrate specificity with strong oxidative activity on pure amorphous cellulose and xyloglucan. It could simultaneously oxidize cellulose, xylan and xyloglucan in natural hemi/cellulosic substrate such as fibrillated eucalyptus pulp, and released native and oxidized cello-oligosaccharides, xylo-oligosaccharides and xyloglucan oligosaccharides from this substrate, but its cellulolytic/hemicellulolytic activity became weaker as the contents of xylan increase in the alkaline-extracted hemi/cellulosic substrates. The dual cellulolytic/hemicellulolytic activity enables TrAA14A to possess a profound boosting effect on cellulose hydrolysis by cellulolytic enzymes. Structure modelling of TrAA14A revealed that it exhibits a relatively flat active-site surface similar to the active-site surfaces in AA9 LPMOs but quite distinct from PcAA14B, despite TrAA14A is strongly clustered together with AA14 LPMOs. Remarkable difference in electrostatic potentials of L2 and L3 surfaces was also observed among TrAA14A, PcAA14B and NcLPMO9F. We speculated that the unique feature in substrate-binding surface might contribute to the cellulolytic/hemicellulolytic activity of TrAA14A. Conclusions: The extensive cellulolytic/hemicellulolytic activity on natural hemi/cellulosic substrate indicated that TrAA14A from ascomycete is distinctively different from previously characterized xylan-active AA9 or AA14 LPMOs. It may play as a bifunctional enzyme to decompose some specific network structures formed between cellulose and hemicellulose in the plant cell walls. Our findings shed new insights into the novel substrate specificities and biological functionalities of AA14 LPMOs, and will contribute to developing novel bifunctional LPMOs as the booster in commercial cellulase cocktails to efficiently break down the hemicellulose-cellulose matrix in lignocellulose. [ABSTRACT FROM AUTHOR]

The diversity, composition, and abundance of soil fungi from three sacred groves in Kerala, namely Iringole kavu of Ernakulam District, Kollakal Thapovanam of Alappuzha District, and Poyilkavu of Kozhikode District were analysed using Metagenomics analysis and Illumina sequencing. A total of 30,584, 78,323, and 55,640 reads were obtained from these groves, respectively. Ascomycota constitutes over 96% of the total fungi, making it the most abundant phylum, followed by Mortierellomycota, Basidiomycota, Chytridiomycota, and Rozellomycota. These phyla were subdivided into 20 classes, 40 orders, 83 families, 119 genera, and 135 species, while 1269 OTUs remained unidentified at the species level. Eurotiomycetes predominates the class, while the genus Talaromyces from the family Trichomaceae dominates the genera. Neocarmospora falciformis, Trichoderma lixii, and Candida ethanolic are the most abundant fungal species. Diversity analysis shows that Kollakal Thapovanam is rich in fungal species, while Poyilkavu is rich in biodiversity, with a high degree of dominance. Several species were found only in a particular grove and were absent in others and vice-versa, indicating high fungal specificity. Therefore, fungi have to be preserved in their original habitat. The Principal Coordinate Analysis revealed that each grove is distinct highlighting the importance of preserving the unique diversity of each sacred grove. In conclusion, this research provides valuable information about the soil fungal genera in their natural habitat. It emphasizes the need for more systematic research to understand the actual diversity and ecological role of fungi in sacred groves. This study is the first of its kind to analyse and compare soil fungal diversity in sacred groves using the metagenomics approach. [ABSTRACT FROM AUTHOR]

Six new polyketides, which includes three new lactones (talarotones A-C) (1-3), one new polyketide (talarotide A) (4), two new polyenes (talaroyenes A, B) (5, 6), together with one new meroterpenoid (talaropenoid A) (7) and 13 known compounds (8-20) were isolated from the mangrove-derived fungus Talaromyces flavus TGGP35. The structure and configuration of the compounds 1-7 were elucidated from the data obtained from HR-ESI-MS, IR, 1D/2D NMR spectroscopy, Mo2 (OAc)4-induced electronic circular dichroism (ECD), CD spectroscopy, and modified Mosher's method. Compounds 5 and 20 displayed antioxidant activity with IC50 values of 0.40 and 1.36mM, respectively. Compounds 3, 6, 11, 16, and 17 displayed cytotoxic activity against human cancer cells Hela, A549, and had IC50 values ranging from 28.89 to 62.23 µM. Compounds 7, 10-12, and 14-18 exhibited moderate or potent anti-insect activity against newly hatched larvae of Helicoverpa armigera Hubner, with IC50 values in the range 50-200µg/mL. Compound 18 showed antibacterial activity against Ralstonia solanacearum with the MIC value of 50 µg/mL.. [ABSTRACT FROM AUTHOR]

The symbiosis between endophytic fungi and plants can promote the absorption of potassium, nitrogen, phosphorus, and other nutrients by plants. Phosphorus is one of the indispensable nutrient elements for plant growth and development. However, the content of available phosphorus in soil is very low, which limits the growth of plants. Phosphorus-soluble microorganisms can improve the utilization rate of insoluble phosphorus. In this study, Talaromyces verruculosus (T. verruculosus), a potential phosphorus-soluble fungus, was isolated from Acer truncatum, a plant with strong stress resistance, and its phosphorus-soluble ability in relation to cucumber seedlings under different treatment conditions was determined. In addition, the morphological, physiological, and biochemical indexes of the cucumber seedlings were assessed. The results show that T. verruculosus could solubilize tricalcium phosphate (TCP) and lecithin, and the solubilization effect of lecithin was higher than that of TCP. After the application of T. verruclosus, the leaf photosynthetic index increased significantly. The photosynthetic system damage caused by low phosphorus stress was alleviated, and the root morphological indexes of cucumber seedlings were increased. The plant height, stem diameter, and leaf area of cucumber seedlings treated with T. verruculosus were also significantly higher than those without treatment. Therefore, it was shown that T. verruculosus is a beneficial endophytic fungus that can promote plant growth and improve plant stress resistance. This study will provide a useful reference for further research on endophytic fungi to promote growth and improve plant stress resistance. [ABSTRACT FROM AUTHOR]