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Gating of the rapid shade-avoidance response by the circadian clock in plants

The phytochromes are a family of plant photoreceptor proteins that control several adaptive developmental strategies. For example, the phytochromes perceive far-red light (wavelengths between 700 and 800 nm) reflected or scattered from the leaves of nearby vegetation. This provides an early warning... Full description

Journal Title: Nature 2003-12-11, Vol.426 (6967), p.680-683
Main Author: Whitelam, Garry C
Other Authors: Salter, Michael G , Franklin, Keara A
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: London: Nature Publishing
ID: ISSN: 0028-0836
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recordid: cdi_proquest_miscellaneous_743226156
title: Gating of the rapid shade-avoidance response by the circadian clock in plants
format: Article
creator:
  • Whitelam, Garry C
  • Salter, Michael G
  • Franklin, Keara A
subjects:
  • Adaptation, Physiological - radiation effects
  • Arabidopsis - genetics
  • Arabidopsis - growth & development
  • Arabidopsis - physiology
  • Arabidopsis - radiation effects
  • Arabidopsis Proteins - genetics
  • Arabidopsis Proteins - metabolism
  • Biological and medical sciences
  • Circadian Rhythm - physiology
  • Circadian Rhythm - radiation effects
  • Darkness
  • Fundamental and applied biological sciences. Psychology
  • Gene Expression Regulation, Plant - radiation effects
  • Hypocotyl - genetics
  • Hypocotyl - growth & development
  • Hypocotyl - physiology
  • Hypocotyl - radiation effects
  • Light
  • Metabolism
  • Mutation - genetics
  • Photoperiod
  • Phytochrome - genetics
  • Phytochrome - metabolism
  • phytochromes
  • PIL1 protein
  • Plant physiology and development
  • RNA, Messenger - genetics
  • RNA, Messenger - metabolism
  • RNA, Plant - genetics
  • RNA, Plant - metabolism
  • Seedlings - genetics
  • Seedlings - growth & development
  • Seedlings - physiology
  • Seedlings - radiation effects
  • Storage and secretion, pigments, phytochrome
  • TOC1 protein
  • Transcription Factors - genetics
  • Transcription Factors - metabolism
ispartof: Nature, 2003-12-11, Vol.426 (6967), p.680-683
description: The phytochromes are a family of plant photoreceptor proteins that control several adaptive developmental strategies. For example, the phytochromes perceive far-red light (wavelengths between 700 and 800 nm) reflected or scattered from the leaves of nearby vegetation. This provides an early warning of potential shading, and triggers a series of 'shade-avoidance' responses, such as a rapid increase in elongation, by which the plant attempts to overgrow its neighbours. Other, less immediate, responses include accelerated flowering and early production of seeds. However, little is known about the molecular events that connect light perception with increased growth in shade avoidance. Here we show that the circadian clock gates this rapid shade-avoidance response. It is most apparent around dusk and is accompanied by altered expression of several genes. One of these rapidly responsive genes encodes a basic helix-loop-helix protein, PIL1, previously shown to interact with the clock protein TOC1 (ref. 4). Furthermore PIL1 and TOC1 are both required for the accelerated growth associated with the shade-avoidance response.
language: eng
source:
identifier: ISSN: 0028-0836
fulltext: no_fulltext
issn:
  • 0028-0836
  • 1476-4687
url: Link


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descriptionThe phytochromes are a family of plant photoreceptor proteins that control several adaptive developmental strategies. For example, the phytochromes perceive far-red light (wavelengths between 700 and 800 nm) reflected or scattered from the leaves of nearby vegetation. This provides an early warning of potential shading, and triggers a series of 'shade-avoidance' responses, such as a rapid increase in elongation, by which the plant attempts to overgrow its neighbours. Other, less immediate, responses include accelerated flowering and early production of seeds. However, little is known about the molecular events that connect light perception with increased growth in shade avoidance. Here we show that the circadian clock gates this rapid shade-avoidance response. It is most apparent around dusk and is accompanied by altered expression of several genes. One of these rapidly responsive genes encodes a basic helix-loop-helix protein, PIL1, previously shown to interact with the clock protein TOC1 (ref. 4). Furthermore PIL1 and TOC1 are both required for the accelerated growth associated with the shade-avoidance response.
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subjectAdaptation, Physiological - radiation effects ; Arabidopsis - genetics ; Arabidopsis - growth & development ; Arabidopsis - physiology ; Arabidopsis - radiation effects ; Arabidopsis Proteins - genetics ; Arabidopsis Proteins - metabolism ; Biological and medical sciences ; Circadian Rhythm - physiology ; Circadian Rhythm - radiation effects ; Darkness ; Fundamental and applied biological sciences. Psychology ; Gene Expression Regulation, Plant - radiation effects ; Hypocotyl - genetics ; Hypocotyl - growth & development ; Hypocotyl - physiology ; Hypocotyl - radiation effects ; Light ; Metabolism ; Mutation - genetics ; Photoperiod ; Phytochrome - genetics ; Phytochrome - metabolism ; phytochromes ; PIL1 protein ; Plant physiology and development ; RNA, Messenger - genetics ; RNA, Messenger - metabolism ; RNA, Plant - genetics ; RNA, Plant - metabolism ; Seedlings - genetics ; Seedlings - growth & development ; Seedlings - physiology ; Seedlings - radiation effects ; Storage and secretion, pigments, phytochrome ; TOC1 protein ; Transcription Factors - genetics ; Transcription Factors - metabolism
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descriptionThe phytochromes are a family of plant photoreceptor proteins that control several adaptive developmental strategies. For example, the phytochromes perceive far-red light (wavelengths between 700 and 800 nm) reflected or scattered from the leaves of nearby vegetation. This provides an early warning of potential shading, and triggers a series of 'shade-avoidance' responses, such as a rapid increase in elongation, by which the plant attempts to overgrow its neighbours. Other, less immediate, responses include accelerated flowering and early production of seeds. However, little is known about the molecular events that connect light perception with increased growth in shade avoidance. Here we show that the circadian clock gates this rapid shade-avoidance response. It is most apparent around dusk and is accompanied by altered expression of several genes. One of these rapidly responsive genes encodes a basic helix-loop-helix protein, PIL1, previously shown to interact with the clock protein TOC1 (ref. 4). Furthermore PIL1 and TOC1 are both required for the accelerated growth associated with the shade-avoidance response.
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8Circadian Rhythm - physiology
9Circadian Rhythm - radiation effects
10Darkness
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26RNA, Messenger - genetics
27RNA, Messenger - metabolism
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29RNA, Plant - metabolism
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abstractThe phytochromes are a family of plant photoreceptor proteins that control several adaptive developmental strategies. For example, the phytochromes perceive far-red light (wavelengths between 700 and 800 nm) reflected or scattered from the leaves of nearby vegetation. This provides an early warning of potential shading, and triggers a series of 'shade-avoidance' responses, such as a rapid increase in elongation, by which the plant attempts to overgrow its neighbours. Other, less immediate, responses include accelerated flowering and early production of seeds. However, little is known about the molecular events that connect light perception with increased growth in shade avoidance. Here we show that the circadian clock gates this rapid shade-avoidance response. It is most apparent around dusk and is accompanied by altered expression of several genes. One of these rapidly responsive genes encodes a basic helix-loop-helix protein, PIL1, previously shown to interact with the clock protein TOC1 (ref. 4). Furthermore PIL1 and TOC1 are both required for the accelerated growth associated with the shade-avoidance response.
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