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Plant Physiol

Title:		MYC2-Activated TRICHOME BIREFRINGENCE-LIKE37 Acetylates Cell Walls and Enhances Herbivore Resistance
Author(s):		Sun A; Yu B; Zhang Q; Peng Y; Yang J; Sun Y; Qin P; Jia T; Smeekens S; Teng S;
Address:		"Laboratory of Photosynthesis and Environmental Biology, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China. University of Chinese Academy of Sciences, Beijing 100049, China. Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands. Laboratory of Photosynthesis and Environmental Biology, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China steng@sibs.ac.cn"
Journal Title:		Plant Physiol
Year:		2020
Volume:		20200730
Issue:		2
Page Number:		1083 - 1096
DOI:		10.1104/pp.20.00683
ISSN/ISBN:		1532-2548 (Electronic) 0032-0889 (Print) 0032-0889 (Linking)
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"
Keywords:		"Acetylation Animals Arabidopsis/*genetics/metabolism/*parasitology Basic Helix-Loop-Helix Leucine Zipper Transcription Factors/genetics/*metabolism Cell Wall/*metabolism Gene Expression Regulation, Plant Genetic Variation Genotype Herbivory/drug effects/*;"
Notes:		"MedlineSun, Aiqing Yu, Bo Zhang, Qian Peng, Yu Yang, Jing Sun, Yonghua Qin, Ping Jia, Tao Smeekens, Sjef Teng, Sheng eng Comparative Study Research Support, Non-U.S. Gov't 2020/08/01 Plant Physiol. 2020 Oct; 184(2):1083-1096. doi: 10.1104/pp.20.00683. Epub 2020 Jul 30"