Characterization of epigenetic modifications in a plant-specific glutaredoxin-mediated repression of stress-responsive gene expression - Details

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In　eukaryotic　cells,　epigenetic　modifications　of　DNA　and　histone　play　an　important　role　in　the　regulation　of　gene　expression.　ROXY19　is　a　member　of　the　plant　specific　CC-type　glutaredoxins　(GRXs).　We　found　previously　that　ROXY19,　by　association　with　the　TOPLESS/TOPLESS-related　(TPL/TPR)　family,　strongly　repressed　a　subset　of　genes　which　were　positively　regulated　by　the　class　II　TGA　factors.　Arabidopsis　plants　ectopic　expressing　ROXY19　(ROXY19OE)　were　hypersensitive　to　xenobiotic　chemicals　due　to　the　silencing　of　detoxification　pathway　genes.　Here,　we　confirmed　in　vivo　the　interaction　between　ROXY19　and　TPL.　In　order　to　understand　the　molecular　mechanism　underlying　ROXY19-TPL　module　mediated　gene　repression,　DNA　methylation　and　histone　deacetylation　inhibitors　were　applied　to　assess　the　involvement　of　epigenetic　modifications　in　the　silencing　of　detoxification　pathway　genes　in　ROXY19OE　plants.　Promoter　regions　of　some　ROXY19　repressed　genes　were　not　methylated　in　wild-type/Col-0,　and　the　methylation　status　were　not　altered　in　ROXY19OE.　Furthermore,　we　investigated　the　role　of　epigenetic　modifications　in　the　antagonistic　interplay　between　ethylene/jasmonic　acid　(ET/JA)　and　salicylic　acid　(SA)　signaling　pathways,　which　were　supposed　to　be　regulated　by　ROXY19.　©　2023　Elsevier　B.V.

Keyword：

Epigenetics Gene expression Glutaredoxin Plant hormone Xenobiotic detoxification

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[ 1 ] [Li N.]Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, China
[ 2 ] [Li N.]Key Laboratory of Forest Bio-resources and Integrated Pest Management for Higher Education in Hunan Province, Central South University of Forestry and Technology, Changsha, 410004, China
[ 3 ] [Yu P.]Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, China
[ 4 ] [Yu P.]Key Laboratory of Forest Bio-resources and Integrated Pest Management for Higher Education in Hunan Province, Central South University of Forestry and Technology, Changsha, 410004, China
[ 5 ] [Zeng Y.]Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, China
[ 6 ] [Chen J.]Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, China
[ 7 ] [Chen J.]Key Laboratory of Forest Bio-resources and Integrated Pest Management for Higher Education in Hunan Province, Central South University of Forestry and Technology, Changsha, 410004, China
[ 8 ] [Yang W.]Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, China
[ 9 ] [Qin G.]Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
[ 10 ] [Du S.]Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
[ 11 ] [Han X.]College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, China
[ 12 ] [Huang L.-J.]Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, College of Forestry, Central South University of Forestry and Technology, Changsha, 410004, China

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Source ：

Environmental and Experimental Botany

ISSN： 0098-8472

Year： 2024

Volume： 217

4 . 5 0 0

JCR@2023

CAS Journal Grade：2

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