RT info:eu-repo/semantics/article
T1 Arabidopsis Response Regulator 6 (ARR6) Modulates Plant Cell-Wall Composition and Disease Resistance
A1 Bacete, Laura
A1 Mélida Martínez, Hugo
A1 López, Gemma
A1 Dabos, Patrick
A1 Tremousaygue, Dominique
A1 Denancé, Nicolas
A1 Miedes, Eva
A1 Bulone, Vincent
A1 Goffner, Deborah
A1 Molina, Antonio
A2 Fisiologia Vegetal
K1 Ingeniería agrícola
K1 Arabidopsis Response Regulators (arr)
K1 Plectosphaerella Cucumerina
K1 Ralstonia Solanacearum
K1 Cell Wall
K1 Cytokinin
K1 Damage-associated Molecular Patterns (damps)
K1 Disease Resistance
K1 Immunity
K1 3102 Ingeniería Agrícola
K1 2417.19 Fisiología Vegetal
AB [EN] The cytokinin signaling pathway, which is mediated by Arabidopsis response regulator (ARR) proteins, has been involved in the modulation of some disease-resistance responses. Here, we describe novel functions of ARR6 in the control of plant disease-resistance and cell-wall composition. Plants impaired in ARR6 function (arr6) were more resistant and susceptible, respectively, to the necrotrophic fungus Plectosphaerella cucumerina and to the vascular bacterium Ralstonia solanacearum, whereas Arabidopsis plants that overexpress ARR6 showed the opposite phenotypes, which further support a role of ARR6 in the modulation of disease-resistance responses against these pathogens. Transcriptomics and metabolomics analyses revealed that, in arr6 plants, canonical disease-resistance pathways, like those activated by defensive phytohormones, were not altered, whereas immune responses triggered by microbe-associated molecular patterns were slightly enhanced. Cell-wall composition of arr6 plants was found to be severely altered compared with that of wild-type plants. Remarkably, pectin-enriched cell-wall fractions extracted from arr6 walls triggered more intense immune responses than those activated by similar wall fractions from wild-type plants, suggesting that arr6 pectin fraction is enriched in wall-related damage-associated molecular patterns, which trigger immune responses. This work supports a novel function of ARR6 in the control of cell-wall composition and disease resistance and reinforces the role of the plant cell wall in the modulation of specific immune responses.
PB MDPI
SN 0894-0282
LK https://hdl.handle.net/10612/20723
UL https://hdl.handle.net/10612/20723
NO Bacete, L., Mélida, H., López, G., Dabos, P., Tremousaygue, D., Denancé, N., Miedes, E., Bulone, V., Goffner, D., & Molina, A. (2020). Arabidopsis response reGUlator 6 (ARR6) modulates plant cell-wall composition and disease resistance. Molecular Plant-Microbe Interactions, 33(5), 767-780. https://doi.org/10.1094/MPMI-12-19-0341-R
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 30-jun-2024