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Mechanisms of far-red light-mediated dampening of defense against Botrytis cinerea in tomato leaves
- Source :
- Plant Physiology, 187(3), 1250. American Society of Plant Biologists, Plant Physiology
- Publication Year :
- 2021
-
Abstract
- Plants detect neighboring competitors through a decrease in the ratio between red and far-red light (R:FR). This decreased R:FR is perceived by phytochrome photoreceptors and triggers shade avoidance responses such as shoot elongation and upward leaf movement (hyponasty). In addition to promoting elongation growth, low R:FR perception enhances plant susceptibility to pathogens: the growth–defense tradeoff. Although increased susceptibility in low R:FR has been studied for over a decade, the associated timing of molecular events is still unknown. Here, we studied the chronology of FR-induced susceptibility events in tomato (Solanum lycopersicum) plants pre-exposed to either white light (WL) or WL supplemented with FR light (WL+FR) prior to inoculation with the necrotrophic fungus Botrytis cinerea (B.c.). We monitored the leaf transcriptional changes over a 30-h time course upon infection and followed up with functional studies to identify mechanisms. We found that FR-induced susceptibility in tomato is linked to a general dampening of B.c.-responsive gene expression, and a delay in both pathogen recognition and jasmonic acid-mediated defense gene expression. In addition, we found that the supplemental FR-induced ethylene emissions affected plant immune responses under the WL+FR condition. This study improves our understanding of the growth–immunity tradeoff, while simultaneously providing leads to improve tomato resistance against pathogens in dense cropping systems.<br />The low red:far-red ratio enhances tomato susceptibility to the necrotrophic fungus Botrytis cinerea via delayed early pathogen detection and dampening of jasmonic acid-mediated defense activation.
- Subjects :
- AcademicSubjects/SCI01280
Light
Physiology
Cyclopentanes
Plant Science
Biology
Shade avoidance
Solanum lycopersicum
Gene expression
Signaling and Response
Genetics
Plant Immunity
Oxylipins
Research Articles
Plant Diseases
Botrytis cinerea
AcademicSubjects/SCI01270
Phytochrome
AcademicSubjects/SCI02288
Inoculation
AcademicSubjects/SCI02287
AcademicSubjects/SCI02286
fungi
food and beverages
Far-red
Focus Issue on Architecture and Plasticity
biology.organism_classification
Horticulture
Shoot
Botrytis
Disease Susceptibility
Solanum
Subjects
Details
- Language :
- English
- ISSN :
- 00320889
- Database :
- OpenAIRE
- Journal :
- Plant Physiology, 187(3), 1250. American Society of Plant Biologists, Plant Physiology
- Accession number :
- edsair.doi.dedup.....1954a1ccf581a2879e9eacac44c4a9bf