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Abstract The D14 protein, an alpha/beta hydrolase, is a key receptor in the strigolactone (SL) signaling pathway. However, the response of VvD14 to SL signals and its role in grapevine root architecture formation remain unclear. This study demonstrated that VvD14c was highly expressed in grapevine tissues and fruit stages than other VvD14 isoforms. Application of GR24, an SL analog, enhanced the elongation and diameter of adventitious roots but inhibited the elongation and density of lateral roots (LRs) and increased VvD14c expression. Additionally, GR24 is nested within the VvD14c pocket and strongly bound to the VvD14c protein, with an affinity of 5.65 × 10−9 M. Furthermore, VvD14c interacted with grapevine MORE AXILLARY GROWTH 2 (VvMAX2) in a GR24-dependent manner. Overexpression of VvD14c in the d14 mutant and VvMAX2 in the max2 Arabidopsis mutant reversed the increased LR number and density, as well as primary root elongation. Conversely, homologous overexpression of VvD14c and VvMAX2 resulted in reduced LR number and density in grapevines. VvMAX2 directly interacted with LATERAL ORGAN BOUNDARY (VvLOB) and VvLBD19, thereby positively regulating LR density. These findings highlight the role of SLs in regulating grapevine root architecture, potentially via the VvD14c-VvMAX2-VvLOB/VvLBD19 module, providing new insights into the regulation of root growth and development in grapevines.

Abstract Fruit ripening is accompanied by the development of fruit quality traits; however, this process also increases the fruit’s susceptibility to various environmental stresses, including pathogen attacks and other stress factors. Therefore, modulating the fruit ripening process and defense responses is crucial for maintaining fruit quality and extending shelf life. Membrane proteins play intricate roles in mediating signal transduction, ion transport, and many other important biological processes, thus attracting extensive research interest. This review mainly focuses on the functions of membrane proteins in regulating fruit ripening and defense responses against biotic and abiotic factors, addresses their potential as targets for improving fruit quality and resistance to environmental challenges, and further highlights some open questions to be addressed.

Abstract Fruit color substantially affects consumer preferences, with darker red strawberries being economically more valuable due to their higher anthocyanin content. However, the molecular basis for the dark red coloration remains unclear. Through screening of an ethyl methanesulfonate mutant library, we identified a rg418 mutant, that demonstrated anthocyanin accumulation during early fruit development stages. Furthermore, the ripening fruits of this mutant had higher anthocyanin content than wild-type (WT) fruits. An analysis of flavonoid content in WT and rg418 mutant fruits revealed substantial changes in metabolic fluxes, with the mutant exhibiting increased levels of anthocyanins and flavonols and decreased levels of proanthocyanidins. Bulked sergeant analysis sequencing indicated that the mutant gene was anthocyanidin reductase (ANR), a key gene in the proanthocyanidin synthesis pathway. Furthermore, transcriptome sequencing revealed the increased expression of MYB105 during the early development stage of mutant fruits, which promoted the expression of UFGT (UDP-glucose flavonoid 3-O-glucosyltransferase), a key gene involved in anthocyanin synthesis, thus substantially enhancing the anthocyanin content in the mutant fruits. Additionally, mutating ANR in a white-fruited strawberry variant (myb10 mutant) resulted in appealing pink-colored fruits, suggesting the diverse roles of ANR in fruit color regulation. Our study provides valuable theoretical insights for improving strawberry fruit color.

Abstract The cultivated tomato, Solanum lycopersicum, is highly sensitive to cold stress (CS), resulting in significant losses during cultivation and postharvest fruit storage. Previously, we demonstrated the presence of substantial genetic variation in fruit chilling tolerance in a tomato recombinant inbred line (RIL) population derived from a cross between a chilling-sensitive tomato line and a chilling-tolerant accession of the wild species S. pimpinellifolium. Here, we investigated molecular and biochemical components associated with chilling tolerance in fruit and leaves, using contrasting groups of “chilling tolerant” and “chilling sensitive” RI lines. Transcriptomic analyses were conducted on fruit exposed to CS, and gene expressions and biochemical components were measured in fruit and leaves. The analyses revealed core responding genes specific to either the cold-tolerant or cold-sensitive RI lines, which were differentially regulated in similar fashion in both leaves and fruit within each group. These genes may be used as markers to determine tomato germplasm cold tolerance or sensitivity. This study demonstrated that tomato response to CS in different developmental stages, including seedling and postharvest fruit, might be mediated by common biological/genetic factors. Therefore, genetic selection for cold tolerance during early stages of plant development may lead to lines with greater postharvest fruit chilling tolerance.

Dickeya fangzhongdai ZXC1 is a newly identified highly virulent causal agent of taro bacterial soft rot disease isolated from a taro sample showing typical soft rot symptoms in Shaoguan, Guangdong Province, China. The pathogen produces plant cell wall–degrading enzymes that macerate the taro tube tissues. In this study, we report the whole-genome sequencing analysis of strain ZXC1. The results showed that strain ZXC1 has one circular DNA chromosome of 5,129,951 bp with a 56.59% G+C content. In addition to sharing a conserved zms gene cluster that encodes the genes for biosynthesis of phytotoxin zeamines and 11 copies of predicted pectate lyase genes, the strain ZXC1 genome contains more prophage loci and a higher number of type IV secretion system and type IV secretion system gene clusters than the D. fangzhongdai strains isolated from pears or phalaenopsis, which may account for its strong virulence phenotype. The data from this study present a valuable resource for elucidation of the pathogenic mechanisms of D. fangzhongdai and may aid in developing new disease control approaches to safeguard taro production. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Many phytopathogens translocate virulence (effector) proteins into plant cells to circumvent host immune responses during infection. One such pathogen is Pseudomonas syringae pv. tomato DC3000, which secretes at least 29 effectors into host cells, of which a subset elicits host defense responses in crop plant species. However, it is unknown whether P. syringae pv. tomato DC3000 activates immune responses in diverse maize inbreds. Here, we screened a diverse maize germplasm collection for effector-dependent recognition of this bacterial pathogen. As a control, we infiltrated P. syringae DC3000(D36E), a derivative of P. syringae pv. tomato DC3000 that lacks all endogenous effectors. In our evaluations, we observed a variety of responses to P. syringae pv. tomato DC3000 in maize and scored the phenotypes as either having no observable response (N) or exhibiting one of three responses: weak chlorosis (WC), chlorosis (C) with minimal cell death, and hypersensitive reaction (HR)-like cell death. Of the 26 maize inbreds screened, 13 were scored as N, 2 as WC, 2 as C, and 9 as HR-like cell death. Importantly, no maize line responded to P. syringae DC3000(D36E), demonstrating that the responses observed are likely dependent on recognition of one or more Pseudomonas effectors. Furthermore, the maize inbreds that recognize P. syringae pv. tomato DC3000 accumulated detectable hydrogen peroxide as well as an increase in transcript expression of a subset of maize defense genes. Collectively, our results will likely stimulate new research aimed at identifying the cognate maize disease resistance proteins that recognize the activities of one or more bacterial effectors. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Potato common scab is a deleterious bacterial disease caused by multiple Streptomyces species. In this paper, we report the high-quality genome sequence of the scab-causing strain Streptomyces scabiei LBUM848, which was isolated from a scab-infected potato tuber harvested in Bloomfield (New Brunswick, Canada). LBUM848 has been used as a model strain for more than a decade in our laboratory to study the interaction between plant-beneficial phenazine-producing Pseudomonas spp. and scab-causing Streptomyces spp. The analysis of LBUM848’s genome revealed that this strain harbors an extensive repertoire of virulence determinants, including various phytotoxins and secreted proteins. By comparing the genome of LBUM848 with the genomes of other sequenced S. scabiei strains, we found that LBUM848 is closely related to several scab-causing strains isolated from Prince Edward Island, Canada. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Bacillus subtilis, a gram-positive bacterium commonly found in soil, is an excellent organism for plant biocontrol. B. subtilis KRS015, an endophyte isolated from the seed of Gossypium hirsutum ‘Zhongzhimian No. 2’, has been proven based on its antagonistic activity against diverse fungal pathogens of plants, including Verticillium dahliae, a fungal pathogen of Verticillium wilt in various plants such as cotton. Here, we report the complete genome sequence of B. subtilis KRS015. The size of the KRS015 genome is 4,331,506 bp. Fifteen gene clusters for antibiotics and secondary metabolites and 412 genes involved in plant–bacterial interactions were identified in this genome. These findings qualified the potential of B. subtilis KRS015 as a biocontrol agent and may help reveal the molecular basis of its antagonistic mechanisms. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

KRS022 was isolated from the rhizosphere soil of a healthy plant in a pathogen-infested cotton field in Xinjiang, China. Previous studies have demonstrated that KRS022 possesses the ability to trigger plant immune responses, inhibit the growth of various pathogenic fungi, including Verticillium dahliae, and promote plant growth. The antagonistic properties of KRS022 primarily stem from its bioactive metabolites. In this study, the high-quality genome of KRS022 was obtained. The KRS022 genome consists of a chromosome of 6,369,026 bp with 67.09% GC content and possesses 5,830 open reading frames, of which 5,186 genes were annotated, and 119 were ncRNA genes. Additionally, 11 gene clusters of secondary metabolites biosynthesis were predicted, involved in polyketide synthase, arylpolyene, NAGGN, beta-lactone, ranthipeptide, PiPP-like, redox cofactor, and non-ribosomal peptide-synthetase clusters. It could be useful to explore the biocontrol potential of P. tohonis, implying promising application of KRS022 to biological control. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

An individual grower's response to pests and diseases in their vineyard can have consequences for an entire growing region. Collective action strategies can help align grower responses to achieve better regional disease control. Ways in which we identify, approach, and address manager opinions regarding cooperative management efforts influence the success of collective action strategies. A Q-method survey was conducted to investigate the adoption obstacles of wine grape growers to regionally collective actions for managing pests and diseases. Qualitative information from the western United States (n = 17 participants) was used to generate 36 statements describing opinions on collective management action and general disease management. A second set of grape producers (n = 59) was asked to rank these statements relative to each other. Participants perceived that collective management action would be worth the extra associated time or costs. Four prominent archetypal perspectives arose from the Q-method analysis, explaining 66% of the variance in expressed opinions. Archetypes were termed “The Cooperators” (14 of 59), “The Quasi-Individualists” (9 of 59), “The Mid-Level Pragmatists” (8 of 59), and “The Bottom-Line Focused” (5 of 59). These groups were split across the demographic information collected; archetypes explained more variation between responses than demographic information. Overall, participants were likely to agree that cooperation was important, but they were more concerned about their individual vineyard economic and crop health concerns, thus suggesting that if outreach professionals want to increase the likelihood of grape growers participating in collective pest management actions, they should emphasize the individual benefits of participation. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

The use of untreated, recirculated irrigation water is a profitable practice, but it can harbor plant pathogens such as Phytophthora (Pt) cinnamomi, Pt. nicotianae, Phytopythium (Pp) vexans, and Pp. helicoides, posing disease risks in crop production. UV-C (240 to 290 nm) light-emitting diode (LED) irradiation was evaluated for inactivating the zoospores of oomycetes in water, providing potential for effective treatment. Zoospore suspensions were exposed to quantifiable UV-C doses under dynamic stirring, calculated by multiplying fluence rate (mW cm−2) and exposure time(s). UV-C irradiation effectively inactivated the tested pathogens following linear (logarithmic linear [Pt. cinnamomi and Pt. nicotianae]) and nonlinear (Weibull and Weibull + tail [Pp. vexans and Pp. helicoides]) kinetics as identified by parameters of goodness of model fit: high R2 and low root mean square error (RMSE) values. D10 values of Pt. cinnamomi and Pt. nicotianae calculated from the rate constants (Kmax) of the log-linear models were 5.05 ± 0.38 mJ cm−2 (R2 = 0.95, RMSE = 0.091, Kmax = 0.49 ± 0.03) and 4.73 ± 0.33 mJ cm−2 (R2 = 0.96, RMSE = 0.091, Kmax = 0.49 ± 0.03), respectively. The Weibull + tail model best described the inactivation of Pp. vexans (R2 = 0.97, RMSE = 0.099) and Pp. helicoides (R2 = 0.96, RMSE = 0.083), and the δ and Nres values were determined to be 9.88 ± 0.12 and 2.06 ± 0.06 and 11.47 ± 0.38 and 2.45 ± 0.05, respectively. These study findings can be applied to develop water disinfection systems, either alone or in combination with other methods, for effective control of pathogens in irrigation systems. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Microbial endophytes live asymptomatically within a host plant and contribute positively to its fitness. Endophytes associate ubiquitously with all plants examined so far and form an integral part of the host for processes such as nutrient uptake and stress response and traits like disease resistance. Well-characterized host–endophyte interaction models exist, but little is known about the microbiome of the monocot plant host, palm. In this study, we identified the endophytic fungal community associated with mule palm leaves with an objective to test their antagonist effects on lethal pathogens of palms. The leaflets of mule palms were sampled across five sites in Central and South Florida, and fungal endophytes were identified using culture-dependent (CD) and amplicon sequence-based culture-independent (CI) methods. Operational taxonomic units (OTUs) corresponding to phylum Ascomycota were identified by both approaches, whereas Basidiomycota were only detected using the CI method. Among the ascomycetes, a small (22%) overlap in the OTUs at the genus level was observed between the two methods, whereas the majority (64%) of OTUs were detected using the CI approach. In vitro cocultivation of endophytes with palm pathogens was observed to produce three distinct interaction phenotypes: inhibition zone, niche establishment, and overlapping growth. Eight endophytes capable of inhibiting fungal pathogen growth in vitro were also identified, suggesting a biocontrol potential for endophyte-derived secondary metabolites. A better understanding of the composition, assembly, and ecology of palm-associated microbial communities would eventually lead to healthy and resilient palms. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Xanthomonas oryzae are destructive phytopathogens in rice production and also an important model system for studying the interaction between plants and bacterial pathogens. Here, we report the isolation and complete genome sequence of the X. oryzae strain YXol-1. Through the identification of transcription activator-like effectors and whole-genome-based phylogenetic analysis, we confirmed that YXol-1 belongs to a rarely reported type of X. oryzae pathovar named X. oryzae pv. leersiae (Xol). The present work enriches the genetic resources of Xol for studying the evolution of X. oryzae strains and can contribute to a better understanding of Xol–host interaction. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Beet curly top in sugar beet and common bean is a major yield-limiting factor that is caused by beet curly top virus (BCTV) and is vectored by the beet leafhopper (BLH; Circulifer tenellus). BLH populations in southern Idaho were tracked during the 2020 and 2021 growing seasons in desert areas and sugar beet and common bean fields with yellow sticky cards to assess BLH population levels and identify the curly top virus species/strains and phytoplasmas present. Plants from monitored crop fields were also assessed for the same pathogens. In one desert area (Elmore Co.), BLH populations began increasing in May and were present in double-digit numbers per card through the summer at all sites in both years. However, the BLH numbers at other desert sites were at or near zero. Local weed populations and not desert areas appeared to be the primary source of BLH in crop fields. Based on cytochrome oxidase gene sequence, two haplotypes dominated the BLH population. In both years, BCTV strains Worland and Colorado were the primary strains in BLH and plant samples. The California/Logan, pepper curly top (PeCT), and severe strains of BCTV were also detected in BLH, along with spinach curly top Arizona virus (SpCTAV). Phytoplasmas were detected in 1% of BLH samples in both years. Phytoplasmas, SpCTAV, and PeCT were not detected in plant samples. This project established the curly top species/strains for which host plant resistance is needed, as well as the time and areas when crops are at the highest risk for infection. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

The wheat fungal pathogens Puccinia graminis f. sp. tritici (Pgt), P. striiformis f. sp. tritici, and P. triticina, causing stem, stripe, and leaf rust, respectively, pose a threat to global wheat production. Genetic resistance in the form of resistance (R) genes provides the best protection, but rust fungal populations change frequently by mutating avirulence (AVR) effectors matching specific R genes, thereby defeating resistance. Hence, characterization of AVR effectors is needed to understand the evolution of pathogen populations, provide insights for extending the effectiveness of R genes, and yield tools for the identification and isolation of R genes. Functional characterization of Avr genes in rust fungi is challenging in these biotrophic pathogens that lack a reliable and efficient transformation system. Studies indicate that the recently engineered foxtail mosaic virus (FoMV) shows promise as an expression system in cereals. In this study, we utilized two confirmed AVR effectors from Pgt, AVRSr35 and AVRSr50, to assess the applicability of FoMV for investigating rust fungus Avr genes. We showed that vector FoMV PV101 carrying PgtAvrSr35 induced a hypersensitive response (HR) in wheat having the corresponding Sr35 resistance gene. However, when carrying PgtAvrSr50, no HR or even mild viral symptoms were seen in a wheat line having Sr50, as this particular wheat line was not susceptible to FoMV. Several wheat cultivars did not support FoMV replication. The results here show that FoMV PV101 is effective as an expression vector for studying rust fungi AVR effectors, but its applicability relies on the susceptibility of wheat cultivars to FoMV. [Figure: see text] Copyright © 2024 His Majesty the King in Right of Canada, as represented by the Minister of Agriculture and Agri-Food Canada. This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

In South Asia, bacterial wilt pathogens in the Ralstonia solanacearum species complex (RSSC) impose major constraints on eggplant, tomato, and pepper production. To improve the efficacy of bacterial wilt management, the goals of this study were to (i) conduct a survey of RSSC pathogens in Bangladesh and Nepal, (ii) characterize the genetic diversity of these isolates, and (iii) screen 37 tomato, eggplant, and pepper accessions for resistance to six representative isolates from South Asia. We isolated 99 isolates from Bangladesh and 20 isolates from Nepal and determined that all are phylotype I isolates of the Ralstonia pseudosolanacearum species. We sequenced and assembled draft genomes for 25 isolates. Phylogenomic analyses suggest that there is a wide diversity of endemic phylotype I isolates in South Asia and possible introductions of two clonal phylotype I lineages into Bangladesh and Nepal. We contextualize our newly described isolates based on prior reports of RSSC diversity in South Asia and global reports of RSSC pathogens on eggplant and pepper. Greenhouse trials revealed multiple tomato, eggplant, and pepper accessions that exhibit promising levels of resistance to six phylotype I isolates from South Asia. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Cercospora beticola, causal agent of Cercospora leaf spot of sugarbeet (Beta vulgaris subsp. vulgaris), is the most economically damaging foliar pathogen inhibiting sugarbeet production. Despite the global importance of C. beticola, significant knowledge gaps exist pertaining to pathogen virulence and adaptation to management practices that include the use of resistant host varieties and the application of different fungicide chemistries. The lack of a high-quality reference genome for C. beticola has hindered research progression addressing these critical knowledge gaps. Here, we report the complete and gapless genome assembly and annotation of the reference C. beticola isolate Cb09-40. We identified misassembled regions in the previous reference genome and annotated previously missing protein-coding genes. This work establishes a high-quality reference genome that can serve as the foundation for future comparative genomic, population genetic, and evolutionary studies into the virulence and evolution of this important plant pathogen. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Late leaf spot, caused by Nothopassalora personata, is an economically important disease of peanut that routinely requires several applications of preventative fungicides. The objectives of this study were to quantify the risk of phenotypic fungicide resistance and potential cross-resistance among N. personata populations. A total of 59 samples of N. personata isolates were collected from 28 grower or research fields in South Carolina, Georgia, and Virginia. Phenotypic resistance of isolates was evaluated against 14 fungicides and a nontreated control, with active ingredients from the quinone outside inhibitor, demethylation inhibitor, and succinate-dehydrogenase inhibitor (SDHI) classes. Overall, visual incidence of lesion development 15% or greater was observed with nearly all isolates for at least one of the active ingredients tested. Correlations between active ingredients penthiopyrad and pydiflumetofen, as well as bixafen plus flutriafol and pydiflumetofen, and their lesion development risk indicate potential N. personata populations with SDHI cross-resistance. Although these data do not confirm the presence of genetic resistance markers, results paired with observed reduced efficacy in the field reinforce the strong need for an integrated approach in managing late leaf spot. In areas with high probabilities for resistance to several modes of action, longer rotations out of peanut, varieties with greater levels of resistance, earlier planting, and continued incorporation of active ingredients with a multi-site mode of action in fungicide programs are advised for preserving fungicide efficacy or reducing selection pressure. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Mycoviruses infect a wide range of fungal species, and many of them have double-stranded RNA (dsRNA) genomes. Using a dsRNA technique makes it easier to detect unknown mycoviruses in fungi. Previously, a few studies reported dsRNA extraction methods from fungal tissues, but the procedures required a significant amount of starting material and time, particularly in growing fungal cultures. In this study, we report an efficient and quick dsRNA extraction method that is reproducible to extract quality dsRNA of mycoviruses from a small amount of fungal culture in a short time. Extracted dsRNA was subsequently used in Illumina sequencing and reverse transcription-polymerase chain reaction assays, followed by Sanger sequencing, to confirm the identity of the mycovirus. Additionally, a rapid and efficient technique named hyphal tip-touch (HTT) was developed to identify known mycoviruses without the need for dsRNA extraction. The HTT technique uses the edge of mycelia as a template for preparing complementary DNA in the reverse transcription reaction, which was used in the polymerase chain reaction assay followed by sequencing. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Nothopassalora personata, the causal agent of late leaf spot, is an economically important fungus that poses a significant threat to peanut production worldwide. Currently, studies on N. personata are focused on epidemiology, host resistance, early environmental detection, and molecular studies based on a limited number of genes for classification. A high-quality whole-genome sequence can be a valuable tool for studying complex species and identifying molecular mechanisms in pathogenicity and adaptation. This study reports a high-quality, chromosome-scale genome assembly for N. personata with a total length of 54.6 Mb, an N50 of 2.54 Mb, a longest contig length of 4.47 Mb, and a BUSCO genome completeness score of 99.5% with mostly single-copy genes. Genome annotation revealed 11,295 protein-encoding genes and 12,121 transcripts in which 411 of the 995 predicted proteins were putative effectors. Genome comparison with the closely related fungi Dothistroma septosporum NZE10 and Fulvia fulva (syn. Passalora fulva, Cladosporium fulvum) isolate Race 5 revealed 13 chromosomes. This genome sequence resource can be used as a reference for aligning sequences of multiple isolates to provide relevant information on the diversity and population genetic structure of N. personata to further inform peanut resistance breeding programs and devise the best disease management strategies. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.

The evaporation rate of disinfestants when sprayed on production surfaces is expected to vary under different weather conditions, but it is unknown how that affects efficacy. This study was an initial investigation into how the evaporation rates of water and six commercial disinfestants vary under eight weather condition categories. Additionally, an empirical model was developed on the evaporation rate of water in response to air temperature, relative humidity, solar radiation, vapor pressure deficit, and wind speed under the same eight weather condition categories. Isopropyl alcohol lost more weight due to evaporation over 4 h (P < 0.0001) than all other disinfestant solutions, and no differences (P = 0.05) existed between the other five disinfestant solutions and water. Isopropyl alcohol had a mean percentage weight loss of 71% under hot and sunny conditions, 43% under cool and cloudy conditions, and 6% under indoor laboratory conditions. Water, hypochlorite, quaternary ammonium, and peroxy disinfestant solutions evaporated at a similar rate over 4 h, with an approximate mean percentage weight loss of 17% under hot and sunny conditions, 6% under cool and cloudy conditions, and 1% under indoor laboratory conditions. The regression model that best explained the influence of weather on evaporation included the variables solar radiation, temperature, and wind speed (P < 0.0001, R2 = 0.5603). This information will be used further to model the evaporative rate of disinfestants under the same range of weather conditions when applied to multiple types of substrate materials that represent common horticultural plant production surfaces. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

Several Neopestalotiopsis spp. have been reported to affect strawberry worldwide. Here, we sequenced two isolates of Neopestalotiopsis 19-02 (highly virulent) and 13-481 (moderately virulent) recovered from commercial strawberry fields in Florida and generated chromosome-scale assemblies using the Oxford Nanopore Technologies and Illumina platforms. Each genome assembly for 19-02 and 13-481 contained putative telomere sequences at the 5′ and 3′ ends. By analyzing the collinearity of the two newly assembled genomes and verifying the conserved telomere sequence at the end of each chromosome, we confirmed that the genome of Neopestalotiopsis spp. consists of seven basic chromosomes. Benchmarking Universal Single-Copy Orthologs (BUSCO) analysis showed 98.5% of conserved core genes for both genome assemblies, 19-02 and 13-481. Phylogenetic analysis with internal transcribed spacer, beta-tubulin, and translation elongation factor regions obtained from the assemblies 19-02 and 13-481 demonstrated that the highly virulent isolate 19-02 is phylogenetically distinct from moderate virulent N. rosae 13-481. Comparative genome analysis of the high-quality reference genome assemblies provided in this study will facilitate the identification of genomic regions responsible for the different virulence of the Neopestalotiopsis pathogen to strawberry. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

Pollen health is a key determinant of successful plant reproduction and crop yield. Prunus necrotic ringspot virus (PNRSV) and prune dwarf virus (PDV) are pollen-borne viruses of stone fruits, including peaches, primarily transmitted through vegetative propagation (i.e., grafting) and pollen. Here, we investigated the effects of PNRSV and PDV infection on peach pollen morphology, viability, and germination. Our scanning electron microscopy on pollen morphology, as well as pollen viability and germination assays, showed that PNRSV has cultivar-specific effects on pollen health; compared with pollen from virus-negative trees, PNRSV infection resulted in distorted shape, reduced viability, and germination of pollen grains of peach cultivar Red Top, but no significant effects on viability or germination were detected on cultivar Zee Lady pollen grains. PDV infection affected pollen width and reduced pollen viability but did not affect pollen germination when compared between PDV-positive and PDV-negative pollen grains. We discuss our results in terms of potential evolutionary consequences and implications on virus epidemiology and disease management in orchards. Investigating the effects of viral infection on pollen health will ultimately enhance our understanding of the transmission of pollen-borne viruses. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Xylella fastidiosa ssp. fastidiosa (Xff) is the causal agent of Pierce's disease of grapevine, a management-intensive and potentially deadly disease. However, different stains and other subspecies, such as Xylella fastidiosa ssp. multiplex (Xfm), exist in the same regions and vary in capacity to cause disease. All strains differ in the fatty acids that comprise cell membranes, as these allow adaptations to specific host microenvironments. Therefore, studies were initiated to observe the fatty acid profiles of different Californian Xf isolates via fatty acid methyl ester (FAME) analysis. Observations revealed that the four Xff strains had similar FAME profiles that were distinct from those of the three Xfm strains, even in isolates that originated from the same host plant species. These data show consistent differences between Xff and Xfm strains and demonstrate the potential that FAME profiling has for Xylella subspecies identification of novel isolates. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

Bacterial wilt strains in the Ralstonia solanacearum species complex (RSSC) pose serious threats to economically important crops worldwide. In 2014, Safni et al. proposed the reclassification of the RSSC into three genomospecies: R. solanacearum (Rsol), R. pseudosolanacearum (Rpseu), and R. syzygii (Rsyz). The revision requires the proper identification of strains for diagnostic and epidemiological studies. In response, we developed the inexpensive and user-friendly RSSC-Lineage Multiplex PCR, which effectively detects plant-pathogenic Ralstonia strains in general and also distinguishes between Rpseu, Rsol, Rsyz, and the high-security Select Agent “race 3 biovar 2” subgroup of Rsol, also known as the phylotype IIB-1 potato brown rot pandemic lineage. Genomes were retrieved from the NCBI GenBank database and screened for unique gene regions using OrthoMCL and other comparative genomic approaches. Specific primers were designed for each genomospecies, Ralstonia in general, and “race 3 biovar 2.” AT-rich flaps were added at the 5ʹ position of each primer to optimize the reaction thermodynamics. The specificity was tested in silico using the NCBI GenBank genome database and an in-house database. The in vitro specificity and accuracy of the tool was validated with 113 representative Ralstonia strains and 24 strains from other genera. The assay is highly specific, generating neither false positives nor false negatives. Primer set detection limits ranged from 10 to 100 pg. The assay also detected and differentiated strains from naturally and artificially inoculated plant hosts. This tool is highly specific, reliable, and economical for culture characterization, diagnostics, surveys, quarantine decisions, and epidemiological studies. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Assessing quantitative disease resistance and other complex traits can be time- and space-consuming, limiting the number of lines that can be evaluated in a breeding program. A potential improvement is the application of genomic prediction models, where genotypic data are used to calculate genomic estimated breeding values, referred to as genomic selection. Genomic prediction uses training datasets, where a germplasm panel is phenotyped and genotyped to calculate genomic estimated breeding values in a validation panel of lines based solely on genotypic data. To develop an initial phenotypic dataset, breeders may consider utilizing previously phenotyped lines in a publicly available dataset, such as plant introductions (PIs) from the USDA Soybean collection. A relevant question is, how effective is genomic prediction across diverse training and prediction panels? To answer this, we used previously collected phenotypic data for quantitative disease resistance toward Phytophthora sojae. Diverse germplasm panels were represented by sets of PIs originating from the United States, the Republic of Korea, and worldwide, for a total collection of 1,768 PIs. The accuracy of the prediction model was significantly influenced by population differentiation between panels, as well as genetic and phenotypic diversity. Low prediction accuracy resulted when the panel used to create the prediction model was highly differentiated from the validation panel. However, the addition of a small number of accessions to the training panel that were more closely related to the validation panel resulted in increased accuracy. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

PhytoFrontiers™ Vol. 4 No. 3

Ramularia crupinae is a novel host-specific fungal pathogen of the invasive rangeland weed common crupina (Crupina vulgaris). The foliar and stem blighting pathogen was originally identified in France and has been approved by the United States Department of Agriculture–Animal and Plant Health Inspection Service as the first biological control agent for the management of common crupina in the western United States. In this study, a chromosome-level genome assembly of R. crupinae 00-010 was performed using PacBio sequencing technology. The assembly had a total size of 37.9 Mb distributed across 14 (telomere to telomere) chromosomes, with a GC content of 47.6%. The genome encoded 10,159 protein-coding genes with 890 predicted secreted proteins that comprised both unique and conserved canonical pathogen effectors. Genome comparisons with closely related pathogen species in the family Mycosphaerellaceae demonstrated family-wide orthologous effector groups and Ramularia-specific orthogroups. This new reference sequence is a valuable genomic tool that will assist in characterizing Ramularia–Crupina interactions and increase our understanding of Ramularia pathogenicity on both crops and weeds. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

Knowledge about how producers subjectively assess and communicate about different information resources can help optimize Agricultural Extension efforts. In particular, how do growers use different information resources when making decisions on pest and disease management? Using pest and disease management in wine grapes (Vitis vinifera) as a case study, three surveys were conducted among grape producers in the western United States to qualitatively explore resource options (n = 15), examine the relative importance of the 23 different information resources identified (n = 63), and investigate the social networks where information is passed within and between regions (n = 65). Five different informational archetypes emerged, demonstrating different preferences for information resource use, which explained 66% of the variance in survey responses. Personal connections (e.g., discussion with professional network, with field foreman and supervisors, and with an Extension agent) were extremely important to the participants. In the communication network analysis, 65 participants were used to form a 324-actor network with 448 links, which were then subdivided into intra-state networks. The networks show evidence of structures that facilitate information diffusion and cooperation between independent producers. Additionally, even with networks much smaller than the grape producer populations in these states, influential individuals could be identified. These individuals, when targeted by outreach professionals, could assist with information dissemination and facilitate changes in opinion or behaviors in the region. [Figure: see text] The author(s) have dedicated the work to the public domain under the Creative Commons CC0 “No Rights Reserved” license by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law, 2024.

Abstract Plants possess the ability to induce programmed cell death (PCD) in response to abiotic and biotic stresses; nevertheless, the evidence on PCD initiation during pear scald development and the involvement of the scald trigger 6-methyl-5-hepten-2-one (MHO) in this process is rudimentary. Pyrus bretschneideri Rehd. cv. ‘Dangshansuli’ pear was used to validate such hypothesis. The results showed that superficial scald occurred after 120-d chilling exposure, which accompanied by typical PCD-associated morphological alterations, such as plasmolysis, cell shrinkage, cytosolic and nuclear condensation, vacuolar collapse, tonoplast disruption, subcellular organelle swelling, and DNA fragmentation. These symptoms were aggravated after MHO fumigation but alleviated by diphenylamine (DPA) dipping. Through transcriptome assay, 24 out of 146 PCD-related genes, which were transcribed during cold storage, were identified as the key candidate members responsible for these cellular biological alternations upon scald development. Among these, PbrCNGC1, PbrGnai1, PbrACD6, and PbrSOBIR1 were implicated in the MHO signaling pathway. Additionally, PbrWRKY2, 34 and 39 could bind to the W-box element in the promoter of PbrGnai1 or PbrSOBIR1 and activate their transcription, as confirmed by dual-luciferase, yeast one-hybrid, and transient overexpression assays. Hence, our study confirms the PCD initiation during scald development and explores the critical role of MHO in this process.

Abstract Potato is the most widely grown non-grain crop and ranks as the third most significant global food crop following rice and wheat. Despite its long history of cultivation over vast areas, slow breeding progress and environmental stress have led to a scarcity of high-yielding potato varieties. Enhancing the quality and yield of potato tubers remains the ultimate objective of potato breeding. However, conventional breeding has faced challenges due to tetrasomic inheritance, high genomic heterozygosity, and inbreeding depression. Recent advancements in molecular biology and functional genomic studies of potato have provided valuable insights into the regulatory network of physiological processes and facilitated trait improvement. In this review, we present a summary of identified factors and genes governing potato growth and development, along with progress in potato genomics and the adoption of new breeding technologies for improvement. Additionally, we explore the opportunities and challenges in potato improvement, offering insights into future avenues for potato research.

Abstract Mitogen-activated protein kinase (MAPK) cascades have been discovered to play a fundamental role in regulating organ abscission. However, the identity of protein substrates targeted by MAPK cascades, as well as whether the role of MAPK protein cascades in the abscission process is conserved across different plant species, remain unknown. Here, the role of homologs of MPK3 and MPK6 in regulating fruit abscission were characterized in litchi. Ectopic expression of LcMPK3 or LcMPK6 in Arabidopsis mpk3 mpk6 mutant rescued the deficiency in floral organ abscission, while silencing of LcMPK3 or LcMPK6 in litchi significantly decreased fruitlet abscission. Importantly, a total of 49 proteins interacting with LcMPK3 were identified through yeast two-hybrid screening, including two components of the MAPK signaling cascade, five transcription factors, and two aquaporins. Furthermore, the interaction between LcMPK3/6 with LcBZR1/2, core components in brassinosteroids signaling that suppress litchi fruitlet abscission, was confirmed using in vitro and in vivo assays. Moreover, phos-tag assays demonstrated that LcMPK3/6 could phosphorylate LcBZR1/2, with several phosphorylation residues identified. Together, our findings suggest that LcMPK3 and LcMPK6 play a positive regulatory role in fruitlet abscission in litchi, and offer crucial information for the investigation of mechanisms underlying MPK3/6-mediated organ abscission in plants.

Diaporthe spp. are a significant plant pathogen causing wood canker, blight, dieback, and fruit decay in numerous economically important plant hosts worldwide. D. nobilis has been identified as a highly pathogenic isolate responsible for causing kiwifruit (Actinidia spp.) rot, representing one of the most significant threats to the kiwifruit industry. Here, a comprehensive genome-wide sequence of D. nobilis strain DJY16A 5-1 utilizing advanced Nanopore third-generation sequencing technology is presented. The genome of D. nobilis strain DJY16A 5-1 was assembled into 26 contigs containing a combined size of 59.28 Mb and N50 length of 4.47 Mb. The virulence-related genes were analyzed, including 3,407 transmembrane proteins, 1,410 secreted proteins, 1,866 signal peptides, 135 effector proteins, 1,069 carbohydrate-active enzymes, 143 membrane transporter proteins, and 4,995 pathogen–host interaction-related proteins. The genome assembly and annotation facilitate the analysis of pathogen–host interaction, laying the foundation for in-depth research on the infection mechanism of pathogens. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Strain WZ-12, isolated from the rhizosphere soil of star anise trees, exhibits significant antifungal efficacy against a variety of fungi, including Colletotrichum horii, the pathogenic fungus responsible for anthracnose in star anise. Based on 16S rRNA gene sequencing and phylogenetic analysis, the strain was identified as a member of the Streptomyces genus. The genome of WZ-12 comprises a linear chromosome of 9,169,400 bp and a plasmid of 378,325 bp, possessing a G + C content of 71.12%. Of note, the genome encompasses 8,172 protein-coding genes, 21 rRNA genes, 74 tRNA genes, and 89 other noncoding RNA genes. The COG, Swiss-Prot, GO, KEGG, and NR databases annotated up to 79.17, 50.50, 13.17, 37.51, and 90.43% of potential genes, respectively. Remarkably, the genome hosts 175 antimicrobial resistance genes and 33 secondary metabolite gene clusters that likely contribute to the biosynthesis of diverse bioactive compounds such as antibiotics and agents with antitumor, antioxidant, immunosuppressive, anti-inflammatory, or stress tolerance properties. These findings highlight the potential of WZ-12 as a promising source of novel bioactive molecules and suggest its significant value as a resource for developing innovative antimicrobial agents. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Sclerotinia sclerotiorum is a fungal pathogen that infects an extremely wide range of hosts and can cause diseases in over 600 plant species. In this study, Sclerotinia sclerotiorum (strain S1), which causes sclerotinosis in mulberry fruits, was isolated from the mulberry orchard at the Chongqing Academy of Agricultural Sciences, China, and its complete genome was sequenced using PacBio Sequel II. The assembly consists of 24 contigs with an estimated genome size of 38.91 Mbp and is predicted to encode 9,920 protein-coding genes. This is the first genomic information for Sclerotinia sclerotiorum isolated from diseased mulberry fruit and represents a valuable resource for a comprehensive understanding of Sclerotinia spp. [Figure: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Abstract Many species of Sapindaceae, such as lychee, longan, and rambutan, provide nutritious and delicious fruit. Understanding the molecular genetic mechanisms that underlie the regulation of flowering is essential for securing flower and fruit productivity. Most endogenous and exogenous flowering cues are integrated into the florigen encoded by FLOWERING LOCUS T. However, the regulatory mechanisms of flowering remain poorly understood in Sapindaceae. Here, we identified 60 phosphatidylethanolamine-binding protein-coding genes from six Sapindaceae plants. Gene duplication events led to the emergence of two or more paralogs of the FT gene that have evolved antagonistic functions in Sapindaceae. Among them, the FT1-like genes are functionally conserved and promote flowering, while the FT2-like genes likely serve as repressors that delay flowering. Importantly, we show here that the natural variation at nucleotide position − 1437 of the lychee FT1 promoter determined the binding affinity of the SVP protein (LcSVP9), which was a negative regulator of flowering, resulting in the differential expression of LcFT1, which in turn affected flowering time in lychee. This finding provides a potential molecular marker for breeding lychee. Taken together, our results reveal some crucial aspects of FT gene family genetics that underlie the regulation of flowering in Sapindaceae.

Abstract The color of red-skinned pear (Pyrus spp.) is primarily attributed to accumulation of anthocyanins, which provide nutritional benefits for human health and are closely associated with the commercial value of fruits. Here, we reported the functional characterization of a R2R3-MYB repressor PyMYB107, which forms an ‘activator-repressor’ loop to control anthocyanin accumulation in the red-skinned pear. PyMYB107 overexpression inhibited anthocyanin biosynthesis in both pear calli and fruits, while virus-induced gene silencing of PyMYB107 increased anthocyanin accumulation in pear fruits. Furthermore, ectopic expression of PyMYB107 decreased anthocyanin accumulation in tomato, strawberry and tobacco. PyMYB107 can competitively bind to PybHLH3 with PyMYB10/MYB114, thereby suppressing the transcriptional activation of key anthocyanin biosynthesis genes, PyANS and PyUFGT. Site-directed mutagenesis showed that mutations within the R3 domain and EAR motif of PyMYB107 eliminated its repressive activity. Additionally, PyMYB107 exhibited a comparable expression pattern to PyMYB10/MYB114 and was transcriptionally activated by them. Our finding advanced comprehension of the repression mechanism underlying anthocyanin accumulation, providing valuable molecular insights into improving quality of pear fruits.

Abstract Prunus conradinae, a valuable flowering cherry belonging to the Rosaceae family subgenus Cerasus and endemic to China, has high economic and ornamental value. However, a high-quality P. conradinae genome is unavailable, which hinders our understanding of its genetic relationships and phylogenesis, and ultimately, the possibility of mining of key genes for important traits. Herein, we have successfully assembled a chromosome-scale P. conradinae genome, identifying 31,134 protein-coding genes, with 98.22% of them functionally annotated. Furthermore, we determined that repetitive sequences constitute 46.23% of the genome. Structural variation detection revealed some syntenic regions, inversions, translocations, and duplications, highlighting the genetic diversity and complexity of Cerasus. Phylogenetic analysis demonstrated that P. conradinae is most closely related to P. campanulata, from which it diverged ~ 19.1 million years ago (Mya). P. avium diverged earlier than P. cerasus and P. conradinae. Similar to the other Prunus species, P. conradinae underwent a common whole-genome duplication event at ~ 138.60 Mya. Furthermore, 79 MADS-box members were identified in P. conradinae, accompanied by the expansion of the SHORT VEGETATIVE PHASE subfamily. Our findings shed light on the complex genetic relationships, and genome evolution of P. conradinae and will facilitate research on the molecular breeding and functions of key genes related to important horticultural and economic characteristics of subgenus Cerasus.

Abstract Most of the carbon found in fruits at harvest is imported by the phloem. Imported carbon provide the material needed for the accumulation of sugars, organic acids, secondary compounds, in addition to the material needed for the synthesis of cell walls. The accumulation of sugars during fruit development influences not only sweetness but also various parameters controlling fruit composition (fruit “quality”). The accumulation of organic acids and sugar in grape berry flesh cells is a key process for berry development and ripening. The present review presents an update of the research on grape berry development, anatomical structure, sugar and acid metabolism, sugar transporters, and regulatory factors.

Abstract. Camel milk is widely used in arid desert areas, and it is of great importance from a health standpoint due to its chemical content and health benefits, which increase after fermentation as a result of the decomposition of its components by lactic acid bacteria. Among these components are the proteins that, when decomposed, produce bioactive peptides that help in the prevention and treatment of many diseases. Thus, it is considered a functional food for human nutrition and to treat health problems in these areas due to its high nutritional value and ease of digestion. It has been proven that camel milk has many beneficial health effects, such as anti-bacterial activities because it contains lactoferrin, lysozyme, immune globulin, and lactoperoxidase, in addition to its ability to adjust cholesterol and blood sugar, and its possession of antioxidant, angiotensin-converting enzyme inhibitor, and anti-cancer activities, and to treat digestive system problems. The effectiveness of these activities increases after fermenting camel milk with Lactic acid bacteria and probiotics are a result of the activity of these bacteria to break down the milk components of fats, proteins and carbohydrates into fatty acids, peptides and polysaccharides that are beneficial from a health standpoint and contribute to prolonging the shelf life of fermented products made from camel milk..

Improvement in practices among farmers could play a major role in the reduction of brucellosis among farmers in the farming areas. The study aimed at assessing the practices enhancing the prevalence of brucellosis among rural women farmers in Kwara state, Nigeria. Three hundred women farmers were interviewed using a questionnaire with questions about socio-economic characteristics, living conditions of the respondents and their animals, level of awareness about brucellosis and practices they engaged in. Descriptive statistics, chi square and Pearson Product Moment Correlation were used to analyze data collected. About 72.0% of the respondents were aware of brucellosis. The study also revealed that 71.0% identified consumption of raw cow milk as a practice enhancing brucellosis transmission, 71.3% consumed raw cattle milk, majority consumed raw cattle meat products, 65.3% had contacts with infected people, 72.0% also had contact with infected cattle, 66.7% dumped of aborted cattle on the street and 72.0% treated sick cattle at home. Conclusively, Consumption of raw cow milk, consumption of raw cattle milk, consumption of raw cattle meat products, contact with infected people, contact with infected cattle, dumping of aborted cattle on the street and treating sick cattle at home were identified to be practices engaged in by the women farmers that enhanced the prevalence of brucellosis transmission. There is need for training programmes on preventive practices especially the rural women who have closest proximity to livestock in order to prevent human and animal morbidity and reduce the burden of brucellosis.

A factorial experiment was carried out by foliar application of zinc in two forms zinc sulphate (ZnSO4) and zinc oxide nanoparticles (ZnO NPs) prepared from aqueous zinc acetate using a wet chemistry method, which were characterized using an atomic force microscope (AFM) as having dimensions of 40-80 nanometres. The foliar of two zinc forms were applied in three concentrations (25, 50 and 100 ppm) in addition to distilled water with the aim of studying their effect on the growth and productivity of durum wheat plants ( Triticum durum, L var. Sham 7) grown under the conditions of Deir Ez-Zor Governorate-Syria. The results showed that adding zinc had a significant effect on all tested morphological indicators (plant heights - chlorophyll - number of branches/plant - number of spikes /plant) and productivity (1000 kernel weight, grain and straw productivity), as well as the grain content of some elements (nitrogen, phosphorus, potassium and zinc). The treatments for adding zinc oxide nanoparticles were significantly superior to those of zinc sulphate in all tested indicators. as the lowest values for the tested indicators were recorded in the regular zinc sulphate treatment at a concentration of 25 ppm compared to the rest of the treatments except for the control treatment, while the Nano zinc oxide treatments at a concentration of 50 and 100 ppm showed superiority significantly in all studied indicators especially in increasing wheat productivity by 24- 26%, compared to the control treatment.

This study presents a comprehensive examination of the application of intercropping as a pivotal strategy for enhancing agricultural diversity, with a focus on evaluating diverse biological and Zeoponic nutrition systems in the intercropping of smooth vetch (Vicia dasycarpa) and coriander (Coriandrum sativum). The experimental design employed was a randomized complete block format with three replications, conducted at the Kermanshah University Research Farm during the cropping year of 2021-2022. The primary plot configuration included four different fertilizer types: a control without any fertilizer (C), with biofertilizer (B), with Zeoponic fertilizer (Z), and a compound strategy with biofertilizer combined with 50% Zeoponic fertilizer (BZ50). Subplots were dedicated to additive intercropping systems, namely: 100% vetch (V100), 100% vetch intercropped with 50% coriander (V100C50), and 100% vetch intercropped with 100% coriander (V100C100). The findings of this experiment revealed that the highest fresh forage yield (12,227 kg/ha) was achieved through the sole cropping of vetch with biofertilizer and a 50% application of Zeoponic fertilizer. Both species exhibited enhancement of different attributes when intercropped under various fertilization regimes. Particularly, the crude protein content (24.5%) and total ash content (10.25%) of vetch were highest in sole cultivation. Furthermore, in the intercropping system with the application of biofertilizers, the highest levels of indigestible fiber (39.6%) and neutral extract fiber (NDF) (34.44%) were recorded. Consequently, the additive intercropping of vetch and coriander is proposed as a recommendable strategy for a medicinal forage combination within the geographic scope of this study.

A field experiment was carried out during the spring season of 2022 with the aim of determining the effects of spraying four concentrations of pyridoxine (0, 1500, 3000, 4500) mg/L on some growth characteristics and yield of three maize varieties (Al-Rabi’, Sarah, Baghdad3). The experiment was conducted at the research station of the College of Agriculture - University of Anbar using a randomized complete block design (RCBD) with three replications. The results of the study indicated a significant effect of pyridoxine on plant growth characteristics, and yield and its components. The concentration 4500 mg/L gave the highest average for leaf area, number of grains per ear, weight of 300 grains, and grains yield. The varieties differed significantly in most of the studied traits, as variety (Baghdad3) was distinguished by the shortest period of male and female flowering, the number of grains per ear, and the grain yield; while variety (Al-Rabi’) exceeded in the traits of leaf area and weight of 300 grains. The interaction between the varieties and the concentrations of pyridoxine also had a significant effect on most of the studied traits, as variety (Al-Rabi’) was superior in grain yield at concentration (4500 mg/L).

In southern Iraq, the local buffalo holds significant importance as a domestic animal. This study aimed to contribute to the documentation and preservation of buffalo by examining the macroscopic and microscopic characteristics of the tongue and lingual papillae in adult buffalo aged 1-1.5 years. Six tongue specimens from each buffalo were analyzed to investigate both anatomical and histological features, including the comparison of statistical data between the tongues. The study delineated various lingual papillae on the tongue, revealing the presence of five identifiable types on the tongue surface. Among these, three were categorized as mechanical papillae (filiform, conical, and lenticular), while two were identified as gustatory papillae (vallate and fungiform). Although certain morphological features of the buffalo tongue resembled those of other ruminants, the lingual prominence in buffalo was notably higher and more developed. Notably, there were more mechanical papillae, covered by a thicker, keratinized epithelium. The research concluded that the buffalo's tongue exhibited strength, highlighting its crucial role in food prehension. The buffalo's tongue, characterized by a gray or blackish color, a rounded margin without a median groove, and a sharp, rounded anterior edge, was found to possess distinctive properties contributing to its efficient grasping of food. Overall, the study identified key attributes of the buffalo tongue, shedding light on its potency and its role in facilitating the buffalo's feeding behavior.

This study aims to estimate the in situ effect of Phoenician juniper leaves on the physicochemical and microbiological quality of fermented goat’s milk stored under ambient conditions. In this study, we used two samples. The first sample was goat's milk flavored with juniper leaves, compared to the control sample without juniper leaves. We analyzed three physicochemical parameters: pH, titratable acidity, and temperature. Furthermore, the bacteriological analysis focused on the following parameters: Total aerobic mesophilic flora (TAMF), total coliforms (TC), fecal coliforms (FC), coagulase-positive Staphylococci (CoPS), and pathogenic bacteria (Salmonella spp and Listeria monocytogenes). The physicochemical results showed a change in the pH and titratable acidity of both samples with a higher acidity for the test sample compared to the control sample. This change was marked by an increase in a load of total aerobic mesophilic flora and lactic acid bacteria, a decrease in the total coliforms and thermotolerant coliforms, and the Staphylococci load in the test sample compared to the control sample, which experienced an increase in these bacterial parameters. For the test sample, juniper leaves reduced bacterial contaminants in fermented goat’s milk by 38% for total coliforms, 41% for fecal coliforms, and 89% for staphylococci. Both samples were free of Salmonella spp and L. monocytogenes. These results are probably due to the effect of bioactive compounds of Juniperus phoenicea L leaves known for their antimicrobial effect. This traditional practice of our ancestors can improve the quality of fermented goat’s milk stored even at ambient temperature.