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Flors, Victor
Résultat de la recherche
Role of two UDP-Glycosyltransferases from the L group of arabidopsis in resistance against pseudomonas syringae
2014, Boachon, Benoît, Gamir, Jordi, Pastor, Victoria, Erb, Matthias, Dean, John V., Flors, Victor, Mauch-Mani, Brigitte
Detection, characterization and quantification of salicylic acid conjugates in plant extracts by ESI tandem mass spectrometric techniques
2012, Pastor, Victoria, Vicent, Cristian, Cerezo, Miguel, Mauch-Mani, Brigitte, Dean, John, Flors, Victor
The ATAF1 transcription factor: at the convergence point of ABA-dependent plant defense against biotic and abiotic stresses
2009, Mauch-Mani, Brigitte, Flors, Victor
Interplay between JA, SA and ABA signalling during basal and induced resistance against Pseudomonas syringae and Alternaria brassicicola
2007, Flors, Victor, Ton, Jurriaan, van Doorn, Ronald, Jakab, Gabor, GarcÃa-AgustÃn, Pilar, Mauch-Mani, Brigitte
We have examined the role of the callose synthase PMR4 in basal resistance and β-aminobutyric acid-induced resistance (BABA-IR) of Arabidopsis thaliana against the hemi-biotrophic pathogen Pseudomonas syringae and the necrotrophic pathogen Alternaria brassicicola. Compared to wild-type plants, the pmr4-1 mutant displayed enhanced basal resistance against P. syringae, which correlated with constitutive expression of the PR-1 gene. Treating the pmr4-1 mutant with BABA boosted the already elevated levels of PR-1 gene expression, and further increased the level of resistance. Hence, BABA-IR against P. syringae does not require PMR4-derived callose. Conversely, pmr4-1 plants showed enhanced susceptibility to A. brassicicola, and failed to show BABA-IR. Wild-type plants showing BABA-IR against A. brassicicola produced increased levels of JA. The pmr4-1 mutant produced less JA upon A. brassicicola infection than the wild-type. Blocking SA accumulation in pmr4-1 restored basal resistance, but not BABA-IR against A. brassicicola. This suggests that the mutant's enhanced susceptibility to A. brassicicola is caused by SA-mediated suppression of JA, whereas the lack of BABA-IR is caused by its inability to produce callose. A. brassicicola infection suppressed ABA accumulation. Pre-treatment with BABA antagonized this ABA accumulation, and concurrently potentiated expression of the ABA-responsive ABI1 gene. Hence, BABA prevents pathogen-induced suppression of ABA accumulation, and sensitizes the tissue to ABA, causing augmented deposition of PMR4-derived callose.
Preparing to fight back: Generation and storage of priming compounds
2014, Pastor, Victoria, Pena, Andrea, Gamir, Jordi, Flors, Victor, Mauch-Mani, Brigitte
Descendants of primed Arabidopsis plants exhibit resistance to biotic stress
2012, Slaughter, Ana, Daniel, Xavier, Flors, Victor, Luna, Estrella, Hohn, Barbara, Mauch-Mani, Brigitte
The ATAF1 transcription factor: At the convergence point of ABA-dependent plant defense against biotic and abiotic stresses
2009, Mauch-Mani, Brigitte, Flors, Victor
Metabolomics of cereals under biotic stress: current knowledge and techniques
2013, Balmer, Dirk, Flors, Victor, Glauser, Gaetan, Mauch-Mani, Brigitte
The multifaceted role of ABA in disease resistance
2009, Ton, Jurriaan, Flors, Victor, Mauch-Mani, Brigitte
Long known only for its role in abiotic stress tolerance, recent evidence shows that abscisic acid (ABA) also has a prominent role in biotic stress. Although it acts as a negative regulator of disease resistance, ABA can also promote plant defense and is involved in a complicated network of synergistic and antagonistic interactions. Its role in disease resistance depends on the type of pathogen, its specific way of entering the host and, hence, the timing of the defense response and the type of affected plant tissue. Here, we discuss the controversial evidence pointing to either a repression or a promotion of resistance by ABA. Furthermore, we propose a model in which both possibilities are integrated.
Interplay between JA, SA and ABA signalling during basal and induced resistance against Pseudomonas syringae and Alternaria brassicicola
2008, Flors, Victor, Ton, Jurriaan, Van Doorn, Ronald, Jakab, Gabor, GarcÃa-AgustÃn, Pilar, Mauch-Mani, Brigitte