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The Role of Light and Circadian Clock in Regulation of Leaf Senescence

Leaf senescence is an integrated response of the cells to develop age information and various environmental signals. Thus, some of the genes involved in the response to environmental changes are expected to regulate leaf senescence. Light acts not only as the primary source of energy for photosynthe...

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Autores principales: Lee, Juhyeon, Kang, Myeong Hoon, Kim, Jung Yeon, Lim, Pyung Ok
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8075161/
https://www.ncbi.nlm.nih.gov/pubmed/33912212
http://dx.doi.org/10.3389/fpls.2021.669170
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author Lee, Juhyeon
Kang, Myeong Hoon
Kim, Jung Yeon
Lim, Pyung Ok
author_facet Lee, Juhyeon
Kang, Myeong Hoon
Kim, Jung Yeon
Lim, Pyung Ok
author_sort Lee, Juhyeon
collection PubMed
description Leaf senescence is an integrated response of the cells to develop age information and various environmental signals. Thus, some of the genes involved in the response to environmental changes are expected to regulate leaf senescence. Light acts not only as the primary source of energy for photosynthesis but also as an essential environmental cue that directly control plant growth and development including leaf senescence. The molecular mechanisms linking light signaling to leaf senescence have recently emerged, exploring the role of Phytochrome-Interacting Factors (PIFs) as a central player leading to diverse senescence responses, senescence-promoting gene regulatory networks (GRNs) involving PIFs, and structural features of transcription modules in GRNs. The circadian clock is an endogenous time-keeping system for the adaptation of organisms to changing environmental signals and coordinates developmental events throughout the life of the plant. Circadian rhythms can be reset by environmental signals, such as light-dark or temperature cycles, to match the environmental cycle. Research advances have led to the discovery of the role of core clock components as senescence regulators and their underlying signaling pathways, as well as the age-dependent shortening of the circadian clock period. These discoveries highlight the close relationship between the circadian system and leaf senescence. Key issues remain to be elucidated, including the effect of light on leaf senescence in relation to the circadian clock, and the identification of key molecules linking aging, light, and the circadian clock, and integration mechanisms of various senescence-affecting signals at the multi-regulation levels in dynamics point of view.
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spelling pubmed-80751612021-04-27 The Role of Light and Circadian Clock in Regulation of Leaf Senescence Lee, Juhyeon Kang, Myeong Hoon Kim, Jung Yeon Lim, Pyung Ok Front Plant Sci Plant Science Leaf senescence is an integrated response of the cells to develop age information and various environmental signals. Thus, some of the genes involved in the response to environmental changes are expected to regulate leaf senescence. Light acts not only as the primary source of energy for photosynthesis but also as an essential environmental cue that directly control plant growth and development including leaf senescence. The molecular mechanisms linking light signaling to leaf senescence have recently emerged, exploring the role of Phytochrome-Interacting Factors (PIFs) as a central player leading to diverse senescence responses, senescence-promoting gene regulatory networks (GRNs) involving PIFs, and structural features of transcription modules in GRNs. The circadian clock is an endogenous time-keeping system for the adaptation of organisms to changing environmental signals and coordinates developmental events throughout the life of the plant. Circadian rhythms can be reset by environmental signals, such as light-dark or temperature cycles, to match the environmental cycle. Research advances have led to the discovery of the role of core clock components as senescence regulators and their underlying signaling pathways, as well as the age-dependent shortening of the circadian clock period. These discoveries highlight the close relationship between the circadian system and leaf senescence. Key issues remain to be elucidated, including the effect of light on leaf senescence in relation to the circadian clock, and the identification of key molecules linking aging, light, and the circadian clock, and integration mechanisms of various senescence-affecting signals at the multi-regulation levels in dynamics point of view. Frontiers Media S.A. 2021-04-12 /pmc/articles/PMC8075161/ /pubmed/33912212 http://dx.doi.org/10.3389/fpls.2021.669170 Text en Copyright © 2021 Lee, Kang, Kim and Lim. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Lee, Juhyeon
Kang, Myeong Hoon
Kim, Jung Yeon
Lim, Pyung Ok
The Role of Light and Circadian Clock in Regulation of Leaf Senescence
title The Role of Light and Circadian Clock in Regulation of Leaf Senescence
title_full The Role of Light and Circadian Clock in Regulation of Leaf Senescence
title_fullStr The Role of Light and Circadian Clock in Regulation of Leaf Senescence
title_full_unstemmed The Role of Light and Circadian Clock in Regulation of Leaf Senescence
title_short The Role of Light and Circadian Clock in Regulation of Leaf Senescence
title_sort role of light and circadian clock in regulation of leaf senescence
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8075161/
https://www.ncbi.nlm.nih.gov/pubmed/33912212
http://dx.doi.org/10.3389/fpls.2021.669170
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