Search

Your search keyword '"Scala, Valeria"' showing total 217 results
Start Over Author "Scala, Valeria"
Sorry, I don't understand your search. ×
217 results on '"Scala, Valeria"'

1. Management of the olive decline disease complex caused by Xylella fastidiosa subsp. pauca and Neofusicoccum spp. in Apulia, Italy

Author

Scortichini, Marco, Loreti, Stefania, Scala, Valeria, Pucci, Nicoletta, Pilotti, Massimo, Tatulli, Giuseppe, Cesari, Erica, L'Aurora, Alessia, Reverberi, Massimo, Cristella, Nicola, Marangi, Paolo, Blonda, Palma, Tarantino, Cristina, Adamo, Maria, Maggi, Sabino, Cesari, Gianluigi, Girelli, Chiara Roberta, Angilè, Federica, Hussain, Mudassar, Migoni, Danilo, and Fanizzi, Francesco Paolo

Published
2024
Full Text
View/download PDF

2. Assessment of Fatty Acid and Oxylipin Profile of Resprouting Olive Trees Positive to Xylella fastidiosa subsp. pauca in Salento (Apulia, Italy).

Author

Scala, Valeria, Scortichini, Marco, Marini, Federico, La Montagna, Dario, Beccaccioli, Marzia, Micalizzi, Kristina, Cacciotti, Andrea, Pucci, Nicoletta, Tatulli, Giuseppe, Fiorani, Riccardo, Loreti, Stefania, and Reverberi, Massimo

Subjects
NORMALIZED difference vegetation index, FREE fatty acids, XYLELLA fastidiosa, SALICYLIC acid, REMOTE-sensing images
Abstract

Xylella fastidiosa subsp. pauca ST53 (XFP), the causal agent of olive quick decline syndrome (OQDS), was thoroughly investigated after a 2013 outbreak in the Salento region of Southern Italy. Some trees from Ogliarola Salentina and Cellina di Nardò, susceptible cultivars in the Gallipoli area, the first XFP infection hotspot in Italy, have resprouted crowns and are starting to flower and yield fruits. Satellite imagery and Normalized Difference Vegetation Index analyses revealed a significant improvement in vegetation health and productivity from 2018 to 2022 of these trees. Lipid molecules have long been recognized as plant defense modulators, and recently, we investigated their role in XFP-positive hosts and in XFP-resistant as well as in XFP-susceptible cultivars of olive trees. Here, we present a case study regarding 36 olive trees (12 XFP-positive resprouting, 12 XFP-positive OQDS-symptomatic, and 12 XFP-negative trees) harvested in 2022 within the area where XFP struck first, killing millions of trees in a decade. These trees were analyzed for some free fatty acid, oxylipin, and plant hormones, in particular jasmonic and salicylic acid, by targeted LC-MS/MS. Multivariate analysis revealed that lipid markers of resistance (e.g., 13-HpOTrE), along with jasmonic and salicylic acid, were accumulated differently in the XFP-positive resprouting trees from both cultivars with respect to XFP-positive OQDS symptomatic and XFP-negative trees, suggesting a correlation of lipid metabolism with the resprouting, which can be an indication of the resiliency of these trees to OQDS. This is the first report concerning the resprouting of OQDS-infected olive trees in the Salento area. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

7. An Inter-Laboratory Comparative Study on the Influence of Reagents to Perform the Identification of the Xylella fastidiosa Subspecies Using Tetraplex Real Time PCR.

Author

Pucci, Nicoletta, Scala, Valeria, Cesari, Erica, Crosara, Valeria, Fiorani, Riccardo, L'Aurora, Alessia, Lucchesi, Simone, Tatulli, Giuseppe, Barra, Eleonora, Ciarroni, Serena, De Amicis, Francesca, Fascella, Salvatore, Giacobbi, Francesca, Gaffuri, Francesca, Gualandri, Valeria, Landi, Lucia, Loconsole, Giuliana, Molinatto, Giulia, Pollastro, Stefania, and Raimondo, Maria Luisa

Subjects
XYLELLA fastidiosa, SUBSPECIES, PLANT protection, COMPARATIVE studies, AGRICULTURAL economics
Abstract

In 2022, a test performance study (TPS) assessing the influence of different master mixes on the performance of the tetraplex real-time PCR (TqPCR) assay was organized. TqPCR allows for the specific detection and identification of Xylella fastidiosa (Xf) subspecies in a single reaction. Eighteen official laboratories of the Italian National Plant Protection Organization received a panel of 12 blind samples, controls, primers, probes, and different master mixes to participate in the TPS. Furthermore, the Research Centre for Plant Protection and Certification of the Council for Agricultural Research and Economics performed an intra-laboratory study (ITS) on spiked plant matrices to evaluate the analytical sensitivity of TqPCR employing the selected master mixes with the best performance. Naturally infected samples were analyzed for subspecies identification via TqPCR compared with the official multilocus-sequence-typing (MLST) method. The best results in this comparative study were obtained using Fast Universal PCR Master Mix (Applied Biosystems) and Brilliant multiplex QPCR Master Mix (Agilent), and they confirmed that the TqPCR test is reliable, offering the advantage of identifying this subspecies at the same time, thus saving time and resources. The TqPCR assay is suggested among the tests to be used by laboratories performing the official diagnosis of Xf to support the activities of official monitoring. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

13. Nanopore sequencing for the detection and identification of Xylella fastidiosa subspecies and sequence types from naturally infected plant material

Author

Faino, Luigi, primary, Scala, Valeria, additional, Albanese, Alessio, additional, Modesti, Vanessa, additional, Grottoli, Alessandro, additional, Pucci, Nicoletta, additional, Doddi, Andrea, additional, L’Aurora, Alessia, additional, Tatulli, Giuseppe, additional, Reverberi, Massimo, additional, and Loreti, Stefania, additional

Published
2021
Full Text
View/download PDF

14. Progress towards Sustainable Control of Xylella fastidiosa subsp. pauca in Olive Groves of Salento (Apulia, Italy)

Author

Scortichini, Marco, primary, Loreti, Stefania, additional, Pucci, Nicoletta, additional, Scala, Valeria, additional, Tatulli, Giuseppe, additional, Verweire, Dimitri, additional, Oehl, Michael, additional, Widmer, Urs, additional, Codina, Josep Massana, additional, Hertl, Peter, additional, Cesari, Gianluigi, additional, De Caroli, Monica, additional, Angilè, Federica, additional, Migoni, Danilo, additional, Del Coco, Laura, additional, Girelli, Chiara Roberta, additional, Dalessandro, Giuseppe, additional, and Fanizzi, Francesco Paolo, additional

Published
2021
Full Text
View/download PDF

15. Signal transduction by Tga3, a novel G protein alpha subunit of Trichoderma atroviride

Author

Zeilinger, Susanne, Reithner, Barbara, Scala, Valeria, Peissl, Isabel, Lorito, Matteo, and Mach, Robert L.

Subjects
G proteins -- Research, Transduction -- Research, Gene expression -- Research, Biological sciences
Abstract

A subgroup III G(alpha) subunit deletion mutant of Trichoderma atroviride is isolated and its role in the development and mycoparasitism is determined. The results show that the Trichoderma atroviride Tga3 has a general role in vegetative growth and can alter mycoparasitism-related characteristics, such as infection structure formation and chitinase gene expression.

Published
2005

20. Sonication-Assisted Production of Fosetyl-Al Nanocrystals: Investigation of Human Toxicity and In Vitro Antibacterial Efficacy against Xylella fastidiosa

Author

Baldassarre, Francesca, primary, Tatulli, Giuseppe, additional, Vergaro, Viviana, additional, Mariano, Stefania, additional, Scala, Valeria, additional, Nobile, Concetta, additional, Pucci, Nicoletta, additional, Dini, Luciana, additional, Loreti, Stefania, additional, and Ciccarella, Giuseppe, additional

Published
2020
Full Text
View/download PDF

22. Tramesan Elicits Durum Wheat Defense against the Septoria Disease Complex

Author

Scala, Valeria, primary, Pietricola, Chiara, additional, Farina, Valentina, additional, Beccaccioli, Marzia, additional, Zjalic, Slaven, additional, Quaranta, Fabrizio, additional, Fornara, Mauro, additional, Zaccaria, Marco, additional, Momeni, Babak, additional, Reverberi, Massimo, additional, and Iori, Angela, additional

Published
2020
Full Text
View/download PDF

33. Oxylipins from both pathogen and host antagonize jasmonic acid‐mediated defence via the 9‐lipoxygenase pathway in Fusarium verticillioides infection of maize

Author

Battilani, Paola, primary, Lanubile, Alessandra, additional, Scala, Valeria, additional, Reverberi, Massimo, additional, Gregori, Rossella, additional, Falavigna, Claudia, additional, Dall'asta, Chiara, additional, Park, Yong‐Soon, additional, Bennett, John, additional, Borrego, Eli J., additional, and Kolomiets, Michael V., additional

Published
2018
Full Text
View/download PDF

34. Gene deletion and genome perturbation

Author

Scala, Valeria, Grottoli, Alessandro, Cigliano, Riccardo Aiese, Beccaccioli, Marzia, Fanelli, Corrado, Dall’Asta, Chiara, Battilani, Paola, Reverberi, Massimo, and Sanseverino, Walter

Published
2016

35. Trametes versicolor bioactive compounds stimulate Aspergillus flavus antioxidant system and inhibit aflatoxin synthesis

Author

Scarpari, Marzia, Parroni, Alessia, Zaccaria, Marco, Fattorini, Laura, Bello, Cristiano, Fabbri, Anna A., Scala, Valeria, Zjalić, Slaven, and Fanelli, Corrado

Subjects
food and beverages, heterocyclic compounds, Aflatoxins, antioxidant enzymes, Aspergillus flavus, oxidative stress, Trametes versicolor
Abstract

Aflatoxins are bioactive compounds, which are toxic and carcinogenic for humans and animals, and are produced mainly by Aspergillus flavus and A. parasiticus. We studied the effect of some bioactive compounds produced into the culture filtrates of the basidiomycete Trametes versicolor on A. flavus growth and aflatoxin synthesis. Some aspects of the mechanism of action of different filtrate fractions were investigated. The results showed that these compounds stimulate the antioxidant system of the Aspergillus mycelia by the induction of a transient and modulated oxidative burst (peroxides and superoxide anions formation) perceived by Afyap1 transcription factor. T. versicolor culture filtrate fractions, significantly inhibited aflatoxin biosynthesis (A: 75% and B: 55%) apparently by stimulating endogenous antioxidant system. In conclusion, bioactive compounds present in the T. versicolor filtrates probably act by modulating the fungal antioxidant system, eventually leading to aflatoxin inhibition. T. versicolor could represent a novel promising tool to control aflatoxins in foods and feeds.

Published
2016
Full Text
View/download PDF

36. Tramesan, a novel polysaccharide from Trametes versicolor. Structural characterization and biological effects

Author

Scarpari, Marzia, primary, Reverberi, Massimo, additional, Parroni, Alessia, additional, Scala, Valeria, additional, Fanelli, Corrado, additional, Pietricola, Chiara, additional, Zjalic, Slaven, additional, Maresca, Vittoria, additional, Tafuri, Agostino, additional, Ricciardi, Maria R., additional, Licchetta, Roberto, additional, Mirabilii, Simone, additional, Sveronis, Aris, additional, Cescutti, Paola, additional, and Rizzo, Roberto, additional

Published
2017
Full Text
View/download PDF

45. Oxylipin involvement in the cross-talk Fusarium verticillioides and maize

Author

Scala, Valeria, Dall'Asta, Chiara, Giorni, Paola, Gregori, Rossella, Cirlini, Martina, Reverberi, Massimo, Ludovici, M, Camera, E, Fanelli, C, and Battilani, Paola

Subjects
cross-talk, maize, Fusarium verticillioides, oxylipin, Settore AGR/12 - PATOLOGIA VEGETALE
Published
2014

46. Genotypic and phenotypic versatility of Aspergillus flavus during maize exploitation

Author

Reverberi, Massimo, Marta, Punelli, Scala, Valeria, Scarpari, Marzia, Paolo, Uva, Mentzen, Wieslawa I., Dolezal, Andrea L., Charles, Woloshuk, Flavia, Pinzari, Fabbri, Anna Adele, Fanelli, Corrado, Payne, Gary A., and Jae Hyuk Yu

Subjects
Applied Microbiology, Fungal Physiology, lcsh:Medicine, Aspergillus flavus, Pathogenesis, Conidium, Transcriptomes, Plant Microbiology, Aflatoxins, Gene Expression Regulation, Fungal, Microbial Physiology, Cluster Analysis, lcsh:Science, skin and connective tissue diseases, Promoter Regions, Genetic, Fungal Biochemistry, Multidisciplinary, biology, Gene Ontologies, Systems Biology, Fungal genetics, Microbial Growth and Development, Genomics, Functional Genomics, Host-Pathogen Interaction, Phenotype, Interaction with host, Metabolome, medicine.drug, Signal Transduction, Research Article, Biotechnology, Genotype, Fungus, Mycology, Secondary metabolite, Zea mays, Microbiology, Microbial Ecology, Genome Analysis Tools, Botany, medicine, Secondary metabolism, Gene Prediction, Biology, Microbial Pathogens, Genetic Association Studies, Microbial Metabolism, lcsh:R, Fungi, Reproducibility of Results, Molecular Sequence Annotation, biology.organism_classification, Oxidative Stress, lcsh:Q, sense organs, Energy Metabolism, Transcriptome
Abstract

Aspergillus flavus is a cosmopolitan fungus able to respond to external stimuli and to shift both its trophic behaviour and the production of secondary metabolites, including that of the carcinogen aflatoxin (AF). To better understand the adaptability of this fungus, we examined genetic and phenotypic responses within the fungus when grown under four conditions that mimic different ecological niches ranging from saprophytic growth to parasitism. Global transcription changes were observed in both primary and secondary metabolism in response to these conditions, particularly in secondary metabolism where transcription of nearly half of the predicted secondary metabolite clusters changed in response to the trophic states of the fungus. The greatest transcriptional change was found between saprophytic and parasitic growth, which resulted in expression changes in over 800 genes in A. flavus. The fungus also responded to growth conditions, putatively by adaptive changes in conidia, resulting in differences in their ability to utilize carbon sources. We also examined tolerance of A. flavus to oxidative stress and found that growth and secondary metabolism were altered in a superoxide dismutase (sod) mutant and an alkyl-hydroperoxide reductase (ahp) mutant of A. flavus. Data presented in this study show a multifaceted response of A. flavus to its environment and suggest that oxidative stress and secondary metabolism are important in the ecology of this fungus, notably in its interaction with host plant and in relation to changes in its lifestyle (i.e. saprobic to pathogenic).

Published
2013

Catalog

Books, media, physical & digital resources
See catalog results