PMID- 35432407 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230306 IS - 1664-462X (Print) IS - 1664-462X (Electronic) IS - 1664-462X (Linking) VI - 13 DP - 2022 TI - Phytochromes A and B Mediate Light Stabilization of BIN2 to Regulate Brassinosteroid Signaling and Photomorphogenesis in Arabidopsis. PG - 865019 LID - 10.3389/fpls.2022.865019 [doi] LID - 865019 AB - Phytochromes A and B (phyA and phyB) are the far-red and red lights photoreceptors mediating many light responses in Arabidopsis thaliana. Brassinosteroid (BR) is a pivotal phytohormone regulating a variety of plant developmental processes including photomorphogenesis. It is known that phyB interacts with BES1 to inhibit its DNA-binding activity and repress BR signaling. Here, we show that far-red and red lights modulate BR signaling through phyA and phyB regulation of the stability of BIN2, a glycogen synthase kinase 3 (GSK3)-like kinase that phosphorylates BES1/BZR1 to inhibit BR signaling. The BIN2 gain-of-function mutant bin2-1 displays an enhanced photomorphogenic phenotype in both far-red and red lights. phyA-enhanced accumulation of BIN2 promotes the phosphorylation of BES1 in far-red light. BIN2 acts genetically downstream from PHYA to regulate photomorphogenesis under far-red light. Both phyA and phyB interact directly with BIN2, which may promote the interaction of BIN2 with BES1 and induce the phosphorylation of BES1. Our results suggest that far-red and red lights inhibit BR signaling through phyA and phyB stabilization of BIN2 and promotion of BES1 phosphorylation, which defines a new layer of the regulatory mechanism that allows plants to coordinate light and BR signaling pathways to optimize photomorphogenesis. CI - Copyright (c) 2022 Zhao, Yang, Jiang, Zhang, Miao, Xu, Chen, Chen, Mao, Guo, Kou, Yang and Wang. FAU - Zhao, Jiachen AU - Zhao J AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Yang, Guangqiong AU - Yang G AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Jiang, Lu AU - Jiang L AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Zhang, Shilong AU - Zhang S AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Miao, Langxi AU - Miao L AD - School of Life Sciences, Fudan University, Shanghai, China. FAU - Xu, Peng AU - Xu P AD - School of Life Sciences, Fudan University, Shanghai, China. FAU - Chen, Huiru AU - Chen H AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Chen, Li AU - Chen L AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Mao, Zhilei AU - Mao Z AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Guo, Tongtong AU - Guo T AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Kou, Shuang AU - Kou S AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Yang, Hong-Quan AU - Yang HQ AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. FAU - Wang, Wenxiu AU - Wang W AD - Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, China. LA - eng PT - Journal Article DEP - 20220330 PL - Switzerland TA - Front Plant Sci JT - Frontiers in plant science JID - 101568200 EIN - Front Plant Sci. 2023 Feb 17;13:1118271. PMID: 36874913 PMC - PMC9005995 OTO - NOTNLM OT - Arabidopsis OT - BRASSINOSTEROID-INSENSITIVE 2 (BIN2) OT - BRI1-EMS SUPPRESSOR 1 (BES1) OT - brassinosteroid (BR) OT - photomorphogenesis OT - phytochrome A (phyA) OT - phytochrome B (phyB) COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2022/04/19 06:00 MHDA- 2022/04/19 06:01 PMCR- 2022/01/01 CRDT- 2022/04/18 06:34 PHST- 2022/01/29 00:00 [received] PHST- 2022/03/07 00:00 [accepted] PHST- 2022/04/18 06:34 [entrez] PHST- 2022/04/19 06:00 [pubmed] PHST- 2022/04/19 06:01 [medline] PHST- 2022/01/01 00:00 [pmc-release] AID - 10.3389/fpls.2022.865019 [doi] PST - epublish SO - Front Plant Sci. 2022 Mar 30;13:865019. doi: 10.3389/fpls.2022.865019. eCollection 2022.