气候变化领域集成服务门户(CCPortal): Phytochrome A elevates plant circadian-clock components to suppress shade avoidance in deep-canopy shade

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DOI	10.1073/pnas.2108176118
	Phytochrome A elevates plant circadian-clock components to suppress shade avoidance in deep-canopy shade
	Fraser D.P.; Panter P.E.; Sharma A.; Sharma B.; Dodd A.N.; Franklin K.A.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:27
英文摘要	Shade-avoiding plants can detect the presence of neighboring vegetation and evoke escape responses before canopy cover limits photosynthesis. Rapid stem elongation facilitates light foraging and enables plants to overtop competitors. A major regulator of this response is the phytochrome B photoreceptor, which becomes inactivated in light environments with a low ratio of red to far-red light (low R:FR), characteristic of vegetational shade. Although shade avoidance can provide plants with a competitive advantage in fast-growing stands, excessive stem elongation can be detrimental to plant survival. As such, plants have evolved multiple feedback mechanisms to attenuate shade-avoidance signaling. The very low R:FR and reduced levels of photosynthetically active radiation (PAR) present in deep canopy shade can, together, trigger phytochrome A (phyA) signaling, inhibiting shade avoidance and promoting plant survival when resources are severely limited. The molecular mechanisms underlying this response have not been fully elucidated. Here, we show that Arabidopsis thaliana phyA elevates early-evening expression of the central circadian-clock components TIMING OF CAB EXPRESSION 1 (TOC1), PSEUDO RESPONSE REGULATOR 7 (PRR7), EARLY FLOWERING 3 (ELF3), and ELF4 in photocycles of low R:FR and low PAR. These collectively suppress stem elongation, antagonizing shade avoidance in deep canopy shade. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Circadian clock; Phytochrome A; Shade avoidance
语种	英语
scopus关键词	phytochrome A; Arabidopsis protein; messenger RNA; PHYA protein, Arabidopsis; phytochrome A; Arabidopsis thaliana; Article; autofluorescence; avoidance behavior; canopy; chromatin immunoprecipitation; circadian rhythm; controlled study; flower development; gene expression; gene mutation; genotype; hypocotyl; light quality; phenotype; photoreceptor; photosynthetically active radiation; plant growth; real time polymerase chain reaction; shade; signal transduction; stem elongation; vegetation; Arabidopsis; gene expression regulation; genetics; light; metabolism; physiology; plant leaf; radiation response; Arabidopsis; Arabidopsis Proteins; Circadian Clocks; Circadian Rhythm; Gene Expression Regulation, Plant; Light; Phytochrome A; Plant Leaves; RNA, Messenger
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/251135
作者单位	School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, United Kingdom; Department of Cell and Developmental Biology, The John Innes Centre, Norwich, NR4 7UH, United Kingdom
推荐引用方式 GB/T 7714	Fraser D.P.,Panter P.E.,Sharma A.,et al. Phytochrome A elevates plant circadian-clock components to suppress shade avoidance in deep-canopy shade[J],2021,118(27).
APA	Fraser D.P.,Panter P.E.,Sharma A.,Sharma B.,Dodd A.N.,&Franklin K.A..(2021).Phytochrome A elevates plant circadian-clock components to suppress shade avoidance in deep-canopy shade.Proceedings of the National Academy of Sciences of the United States of America,118(27).
MLA	Fraser D.P.,et al."Phytochrome A elevates plant circadian-clock components to suppress shade avoidance in deep-canopy shade".Proceedings of the National Academy of Sciences of the United States of America 118.27(2021).