Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China; Collaborative Innovation Centre for Modern Crop Production Co-sponsored by Province and Ministry, Nanjing, China.
Plant Physiol Biochem. 2024 May;210:108650. doi: 10.1016/j.plaphy.2024.108650. Epub 2024 Apr 20.
Plants have evolved the adaptive capacity to mitigate the negative effect of external adversities at chemical, molecular, cellular, and physiological levels. This capacity is conferred by triggering the coordinated action of internal regulatory factors, in which sugars play an essential role in the regulating chloroplast degradation and leaf senescence under various stresses. In this review, we summarize the recent findings on the senescent-associated changes in carbohydrate metabolism and its relation to chlorophyl degradation, oxidative damage, photosynthesis inhibition, programmed cell death (PCD), and sink-source relation as affected by abiotic stresses. The action of sugar signaling in regulating the initiation and progression of leaf senescence under abiotic stresses involves interactions with various plant hormones, reactive oxygen species (ROS) burst, and protein kinases. This discussion aims to elucidate the complex regulatory network and molecular mechanisms that underline sugar-induced leaf senescence in response to various abiotic stresses. The imperative role of sugar signaling in regulating plant stress responses potentially enables the production of crop plants with modified sugar metabolism. This, in turn, may facilitate the engineering of plants with improved stress responses, optimal life span and higher yield achievement.
植物已经进化出适应能力，可以在化学、分子、细胞和生理水平上减轻外部逆境的负面影响。这种能力是通过触发内部调节因子的协调作用来实现的，其中糖在各种胁迫下调节叶绿体降解和叶片衰老中起着至关重要的作用。在这篇综述中，我们总结了最近关于碳水化合物代谢与叶绿素降解、氧化损伤、光合作用抑制、程序性细胞死亡（PCD）和源库关系相关的衰老相关变化的发现，这些变化受非生物胁迫的影响。糖信号在调节非生物胁迫下叶片衰老的起始和进展中的作用涉及与各种植物激素、活性氧（ROS）爆发和蛋白激酶的相互作用。本讨论旨在阐明糖诱导的叶片衰老的复杂调控网络和分子机制，以响应各种非生物胁迫。糖信号在调节植物应激反应中的重要作用可能使具有改良糖代谢的作物植物得以生产。这反过来又可能促进具有改善的应激反应、最佳寿命和更高产量的植物的工程设计。
