Living to Die and Dying to Live: The Survival Strategy behind Leaf Senescence
Living to Die and Dying to Live: The Survival Strategy behind Leaf Senescence
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DOI：
10.1104/pp.15.00498
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发表时间：
2015-10-01
期刊：
影响因子：
7.4
通讯作者：
Jing, Hai-Chun
中科院分区：
文献类型：
--
作者：
Schippers, Jos H. M.;Schmidt, Romy;Jing, Hai-Chun
衰老是叶的最后发育行为，在此期间，叶细胞以协调的方式分解，以重新调动营养物质并确保繁殖成功。衰老过程为植物提供了表型可塑性，以帮助其适应不利的环境条件。在这里，我们提供了一个全面的概述的因素和机制，控制衰老的开始。我们解释了如何在叶片发育过程中建立衰老的能力，所描绘的衰老窗口模型。我们还讨论了植物激素和环境胁迫控制衰老的机制以及源库关系对植物产量和胁迫耐受性的影响。此外，我们还讨论了衰老作为一种胁迫适应策略的作用，以及作物生产和食品质量如何从衰老开始改变的工程或育种作物中受益。
Senescence represents the final developmental act of the leaf, during which the leaf cell is dismantled in a coordinated manner to remobilize nutrients and to secure reproductive success. The process of senescence provides the plant with phenotypic plasticity to help it adapt to adverse environmental conditions. Here, we provide a comprehensive overview of the factors and mechanisms that control the onset of senescence. We explain how the competence to senesce is established during leaf development, as depicted by the senescence window model. We also discuss the mechanisms by which phytohormones and environmental stresses control senescence as well as the impact of source-sink relationships on plant yield and stress tolerance. In addition, we discuss the role of senescence as a strategy for stress adaptation and how crop production and food quality could benefit from engineering or breeding crops with altered onset of senescence.