气候变化领域集成服务门户(CCPortal): Brassinosteroid signaling integrates multiple pathways to release apical dominance in tomato

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DOI	10.1073/pnas.2004384118
	Brassinosteroid signaling integrates multiple pathways to release apical dominance in tomato
	Xi X.; Dong H.; Yin Y.; Song X.; Gu X.; Sang K.; Zhou J.; Shi K.; Zhou Y.; Foyer C.H.; Yu J.
发表日期	2021
ISSN	00278424
卷号	118 期号:11
英文摘要	The control of apical dominance involves auxin, strigolactones (SLs), cytokinins (CKs), and sugars, but the mechanistic controls of this regulatory network are not fully understood. Here, we show that brassinosteroid (BR) promotes bud outgrowth in tomato through the direct transcriptional regulation of BRANCHED1 (BRC1) by the BR signaling component BRASSINAZOLERESISTANT1 (BZR1). Attenuated responses to the removal of the apical bud, the inhibition of auxin, SLs or gibberellin synthesis, or treatment with CK and sucrose, were observed in bud outgrowth and the levels of BRC1 transcripts in the BR-deficient or bzr1 mutants. Furthermore, the accumulation of BR and the dephosphorylated form of BZR1 were increased by apical bud removal, inhibition of auxin, and SLs synthesis or treatment with CK and sucrose. These responses were decreased in the DELLA-deficient mutant. In addition, CK accumulation was inhibited by auxin and SLs, and decreased in the DELLA-deficient mutant, but it was increased in response to sucrose treatment. CK promoted BR synthesis in axillary buds through the action of the type-B response regulator, RR10. Our results demonstrate that BR signaling integrates multiple pathways that control shoot branching. Local BR signaling in axillary buds is therefore a potential target for shaping plant architecture. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Axillary bud; BRANCHED1; Cytokinin; DWARF; Shoot architecture
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180270
作者单位	Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China; College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China; School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, United Kingdom; Key Laboratory of Horticultural Plants Growth, Development and Quality Improvement, Agricultural Ministry of China, Zhejiang University, Hangzhou, 310058, China
推荐引用方式 GB/T 7714	Xi X.,Dong H.,Yin Y.,et al. Brassinosteroid signaling integrates multiple pathways to release apical dominance in tomato[J],2021,118(11).
APA	Xi X..,Dong H..,Yin Y..,Song X..,Gu X..,...&Yu J..(2021).Brassinosteroid signaling integrates multiple pathways to release apical dominance in tomato.Proceedings of the National Academy of Sciences of the United States of America,118(11).
MLA	Xi X.,et al."Brassinosteroid signaling integrates multiple pathways to release apical dominance in tomato".Proceedings of the National Academy of Sciences of the United States of America 118.11(2021).