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A plastidial retrograde-signal potentiates biosynthesis of systemic stress response activators
A plastidial retrograde-signal potentiates biosynthesis of systemic stress response activators
- Source :
- New Phytol
- Publication Year :
- 2021
- Publisher :
- Cold Spring Harbor Laboratory, 2021.
-
Abstract
- SummaryPlants employ an array of intricate and hierarchical signaling cascades to perceive and transduce informational cues to synchronize and tailor adaptive responses. Systemic stress response (SSR) is a recognized complex signaling and response network quintessential to plant’s local and distal responses to environmental triggers, however, the identity of the initiating signals has remained fragmented.Here, we show that both biotic (aphids and viral pathogens) and abiotic (high-light and wounding) stresses induce accumulation of the plastidial-retrograde-signaling metabolite, methylerythritol cyclodiphosphate (MEcPP), leading to reduction of the phytohormone, auxin, and the subsequent decreased expression of the phosphatase, PP2C.D1.This enables phosphorylation of mitogen-activated protein kinases (MAPK3/6), and the consequential induction of the downstream events ultimately resulting in biosynthesis of the two SSR priming metabolites, pipecolic- and N-hydroxy-pipecolic acid.This work identifies plastids as the initiation site, and the plastidial retrograde-signal, MEcPP as the initiator of a multi-component signaling cascade potentiating the biosynthesis of SSR activators, in response to biotic and abiotic triggers.
- Subjects :
- chemistry.chemical_classification
MAPK3
Indoleacetic Acids
Arabidopsis Proteins
Physiology
Kinase
Chemistry
Phosphatase
Arabidopsis
food and beverages
Priming (immunology)
Plant Science
Biology
Article
Cell biology
chemistry.chemical_compound
Biosynthesis
Gene Expression Regulation, Plant
Auxin
Phosphorylation
Plastids
Plastid
Pipecolic acid
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- New Phytol
- Accession number :
- edsair.doi.dedup.....d74ba883e031067fb0102973b530fb46
- Full Text :
- https://doi.org/10.1101/2021.09.21.461262