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Interplay between Jasmonic Acid, Phosphate Signaling and the Regulation of Glycerolipid Homeostasis in Arabidopsis
- Source :
- Plant and Cell Physiology, Plant and Cell Physiology, 2019, 60 (6), pp.1260-1273. ⟨10.1093/pcp/pcz027⟩, Plant and Cell Physiology, Oxford University Press (OUP), 2019, 60 (6), pp.1260-1273. ⟨10.1093/pcp/pcz027⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- International audience; Jasmonic acid (JA) biosynthesis and signaling are activated in Arabidopsis cultivated in phosphate (Pi) deprived conditions. This activation occurs mainly in photosynthetic tissues and is less important in roots. In leaves, the enhanced biosynthesis of JA coincides with membrane glycerolipid remodeling triggered by the lack of Pi. We addressed the possible role of JA on the dynamics and magnitude of glycerolipid remodeling in response to Pi-deprivation and resupply. Based on combined analyses of gene expression, JA biosynthesis and glycerolipid remodeling in wild type Arabidopsis and in the coi1-16 mutant, JA signaling seems important in the determination of the basal levels of phosphatidylcholine (PC), phosphatidic acid (PA), monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG). JA impact on MGDG steady state level and fluctuations seem contradictory. In the coi1-16 mutant, the steady state level of MGDG is higher, possibly due to a higher level of PA in the mutant, activating MGD1, and to an increased expression of MGD3. These results support a possible impact of JA in limiting the overall content of this lipid. Concerning lipid variations, upon Pi-deprivation, JA seems rather associated with a specific MGDG increase. Following Pi-resupply, whereas the expression of glycerolipid remodeling genes returns to basal level, JA biosynthesis and signaling genes are still upregulated, likely due to a JA-induced positive feedback remaining active. Distinct impacts on enzymes synthesizing MGDG, i.e. downregulating MGD3, possibly activating MGD1 expression and limiting the activation of MGD1 via PA, might allow JA playing a role in a sophisticated fine tuning of galactolipid variations.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Galactolipid
Arabidopsis thaliana
Physiology
Mutant
Arabidopsis
Cyclopentanes
Plant Science
Genes, Plant
01 natural sciences
Phosphates
phosphate signaling Plant & Cell Physiology
03 medical and health sciences
chemistry.chemical_compound
Plant Growth Regulators
Biosynthesis
Gene Expression Regulation, Plant
Gene expression
Lipids metabolism
Homeostasis
[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology
Oxylipins
Phosphate signaling
Jasmonic acid
biology
MGD3
MGD1
MGD2
Glycerolipid remodeling
Cell Biology
General Medicine
Phosphatidic acid
Plant
biology.organism_classification
Cell biology
030104 developmental biology
chemistry
Glycolipids
Signal Transduction
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 00320781 and 14719053
- Database :
- OpenAIRE
- Journal :
- Plant and Cell Physiology, Plant and Cell Physiology, 2019, 60 (6), pp.1260-1273. ⟨10.1093/pcp/pcz027⟩, Plant and Cell Physiology, Oxford University Press (OUP), 2019, 60 (6), pp.1260-1273. ⟨10.1093/pcp/pcz027⟩
- Accession number :
- edsair.doi.dedup.....9bec89b6ac6b153e42e2db20b4e3d38d