Low Light/Darkness as Stressors of Multifactor-Induced Senescence in Rice Plants.
Low Light/Darkness as Stressors of Multifactor-Induced Senescence in Rice Plants.
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弱光/黑暗作为多因素诱导水稻衰老的应激源
DOI：
10.3390/ijms22083936
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发表时间：
2021-04-11
影响因子：
5.6
通讯作者：
Miao Y
中科院分区：
文献类型：
--
作者：
Gad AG;Habiba;Zheng X;Miao Y
叶片衰老作为植物最终发育阶段不可或缺的一部分，主要是将养分从源转移到库中，以响应不同的逆境。叶片过早衰老是一个严重的挑战，在作物产量方面造成重大的经济损失。虽然弱光会造成高达50%的损失，并影响水稻的产量和品质，但其调控机制仍不清楚。黑暗介导的叶片早衰是一种被广泛研究的应激源。它启动衰老相关基因(SAGs)的表达，这些基因与叶绿素的分解和降解有关。叶片早衰的分子和生化调控机制表明，在复杂的途径中存在大量的多余生物量。因此，阐明弱光/暗诱导水稻衰老的调控机制可能有助于水稻作物改良策略的制定。本文综述了水稻弱光反应和暗诱导衰老(DIS)相关的分子调控机制，以及它们对水稻叶绿体信号和光合作用过程、叶绿体和蛋白质降解以及激素和转录调控的影响。
Leaf senescence, as an integral part of the final development stage for plants, primarily remobilizes nutrients from the sources to the sinks in response to different stressors. The premature senescence of leaves is a critical challenge that causes significant economic losses in terms of crop yields. Although low light causes losses of up to 50% and affects rice yield and quality, its regulatory mechanisms remain poorly elucidated. Darkness-mediated premature leaf senescence is a well-studied stressor. It initiates the expression of senescence-associated genes (SAGs), which have been implicated in chlorophyll breakdown and degradation. The molecular and biochemical regulatory mechanisms of premature leaf senescence show significant levels of redundant biomass in complex pathways. Thus, clarifying the regulatory mechanisms of low-light/dark-induced senescence may be conducive to developing strategies for rice crop improvement. This review describes the recent molecular regulatory mechanisms associated with low-light response and dark-induced senescence (DIS), and their effects on plastid signaling and photosynthesis-mediated processes, chloroplast and protein degradation, as well as hormonal and transcriptional regulation in rice.