title: Regulation of the WD-repeat/bHLH/MYB complex by gibberellin and jasmonate.
abstract: The phytohormones gibberellin (GA) and jasmonate (JA) regulate various aspects of plant development, growth and defense. Previous studies showed that both DELLA repressors in GA pathway and JA-ZIM domain (JAZ) proteins in JA pathway interact with and repress the WD-repeat/bHLH/MYB transcriptional complex to inhibit trichome initiation, and GA and JA respectively induce DELLAs and JAZs degradation to synergistically enhance trichome formation. In this study, we showed that the DELLA protein RGA and JAZ1 competitively bind to ENHANCER OF GLABRA3 (EGL3), a bHLH component of the WD-repeat/bHLH/MYB complex. GA and JA differently affect the expression and protein stability of the components of the WD-repeat/bHLH/MYB complex, and EGL3 and GL3 repress the expression of JAZ genes as a feedback. The novel findings help to understand the mechanism of the WD-repeat/bHLH/MYB complex in GA/JA-regulated trichome formation.
authors.affiliation: a College of Bioscience and Biotechnology , Hunan Agricultural University , Changsha , P.R. China.
authors.forename: Haixia
authors.initials: H
authors.lastname: Tian
authors.affiliation: b Tsinghua-Peking Center for Life Sciences , MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University , Beijing , P.R. China.
authors.forename: Tiancong
authors.initials: T
authors.lastname: Qi
authors.affiliation: c School of Life Sciences , Capital Normal University , Beijing , P.R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: a College of Bioscience and Biotechnology , Hunan Agricultural University , Changsha , P.R. China.
authors.forename: Cuili
authors.initials: C
authors.lastname: Wang
authors.affiliation: a College of Bioscience and Biotechnology , Hunan Agricultural University , Changsha , P.R. China.
authors.forename: Chunmei
authors.initials: C
authors.lastname: Ren
authors.affiliation: c School of Life Sciences , Capital Normal University , Beijing , P.R. China.
authors.forename: Susheng
authors.initials: S
authors.lastname: Song
authors.affiliation: b Tsinghua-Peking Center for Life Sciences , MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University , Beijing , P.R. China.
authors.forename: Huang
authors.initials: H
authors.lastname: Huang
mesh_terms: D017360:Arabidopsis / Q000187:drug effects / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000378:metabolism; D051792:Basic Helix-Loop-Helix Proteins / Q000235:genetics / Q000378:metabolism; D003517:Cyclopentanes / Q000494:pharmacology*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D005875:Gibberellins / Q000494:pharmacology*; D054883:Oxylipins / Q000494:pharmacology*; D030821:Plants, Genetically Modified / Q000187:drug effects / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D051792:Basic Helix-Loop-Helix Proteins; D003517:Cyclopentanes; D005875:Gibberellins; D054883:Oxylipins; D014157:Transcription Factors; C011006:jasmonic acid
keywords: Gibberellin; WD-repeat/bHLH/MYB complex; jasmonate