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MYC2-Activated TRICHOME BIREFRINGENCE-LIKE37 Acetylates Cell Walls and Enhances Herbivore Resistance.
- Source :
-
Plant physiology [Plant Physiol] 2020 Oct; Vol. 184 (2), pp. 1083-1096. Date of Electronic Publication: 2020 Jul 30. - Publication Year :
- 2020
-
Abstract
- O -Acetylation of polysaccharides predominantly modifies plant cell walls by changing the physicochemical properties and, consequently, the structure and function of the cell wall. Expression regulation and specific function of cell wall-acetylating enzymes remain to be fully understood. In this report, we cloned a previously identified stunted growth mutant named sucrose uncoupled1 ( sun1 ) in Arabidopsis ( Arabidopsis thaliana ). SUN1 encodes a member of the TRICHOME BIREFRINGEN-LIKE family, AtTBL37 AtTBL37 is highly expressed in fast-growing plant tissues and encodes a Golgi apparatus-localized protein that regulates secondary cell wall thickening and acetylation. In sun1 , jasmonate signaling and expression of downstream chemical defense genes, including VEGETATIVE STORAGE PROTEIN1 and BRANCHED-CHAIN AMINOTRANSFERASE4 , are increased but, unexpectedly, sun1 is more susceptible to insect feeding. The central transcription factor in jasmonate signaling, MYC2, binds to and induces AtTBL37 expression. MYC2 also promotes the expression of many other TBLs Moreover, MYC activity enhances cell wall acetylation. Overexpression of AtTBL37 in the myc2-2 background reduces herbivore feeding. Our study highlights the role of O- acetylation in controlling plant cell wall properties, plant development, and herbivore defense.<br /> (© 2020 American Society of Plant Biologists. All Rights Reserved.)
- Subjects :
- Acetylation
Animals
Arabidopsis metabolism
Basic Helix-Loop-Helix Leucine Zipper Transcription Factors genetics
Gene Expression Regulation, Plant
Genetic Variation
Genotype
Herbivory drug effects
Mutation
Trichomes genetics
Arabidopsis genetics
Arabidopsis parasitology
Basic Helix-Loop-Helix Leucine Zipper Transcription Factors metabolism
Cell Wall metabolism
Herbivory genetics
Insecta parasitology
Plant Cells metabolism
Trichomes metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1532-2548
- Volume :
- 184
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Plant physiology
- Publication Type :
- Academic Journal
- Accession number :
- 32732351
- Full Text :
- https://doi.org/10.1104/pp.20.00683