Hydrogen peroxide positively regulates brassinosteroid signaling through oxidation of transcription factor BZR1
作者单位：Key Laboratory of Plant Development and Environment Adaptation BiologyMinistry of EducationSchool of Life SciencesShandong University
会议名称：《2018全国植物生物学大会》
会议日期：2018年
学科分类：0710[理学-生物学] 07[理学] 09[农学] 071007[理学-遗传学] 0901[农学-作物学] 090102[农学-作物遗传育种]
关 键 词：H2O2 brassinosteroid oxidative modification signal transduction
摘 要：Hydrogen peroxide(H O),one of the major reactive oxygen species(ROS),operates as an important signaling molecule involving in a wide range of plant development and stress ***,H O-mediated signaling cascade,especially potential crosstalk between H O and plant hormones,such as brassinosteroid(BR),remains largely ***,we showed that H2 O2 induced the oxidation of the transcription factor BRASSINAZOLE-RESISTANT1(BZR1),which functions as a key master regulator in BR signaling pathway to regulate various plant growth and development processes by controlling expression of thousands of target *** modification enhances BZR1 transcriptional activity by promoting its interaction with key regulators in auxin-and light-signaling pathways,including AUXIN RESPONSE FACTOR6(ARF6) and PHYTOCHROME INTERACTING FACTOR4(PIF4).Genome-wide analysis defined an H202-dependent BZR1-regulated transcriptome that plays more dominanf roles in BZR1-mediated biological processes and cellular ***,thioredoxin protein TRXh5 interacts with BZR1 and catalyzes reduction of *** a new oxidized target,BZRl bridges H O-and thioredoxinmediated redox signaling and BR signaling pathways in regulating plant development.