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- W2983722169 endingPage "495" @default.
- W2983722169 startingPage "495" @default.
- W2983722169 abstract "Leaf senescence is a developmental process critical for plant fitness, which involves genetically controlled cell death and ordered disassembly of macromolecules for reallocating nutrients to juvenile and reproductive organs. While natural leaf senescence is primarily associated with aging, it can also be induced by environmental and nutritional inputs including biotic and abiotic stresses, darkness, phytohormones and oxidants. Reactive oxygen species (ROS) are a common thread in stress-dependent cell death and also increase during leaf senescence. Involvement of chloroplast redox chemistry (including ROS propagation) in modulating cell death is well supported, with photosynthesis playing a crucial role in providing redox-based signals to this process. While chloroplast contribution to senescence received less attention, recent findings indicate that changes in the redox poise of these organelles strongly affect senescence timing and progress. In this review, the involvement of chloroplasts in leaf senescence execution is critically assessed in relation to available evidence and the role played by environmental and developmental cues such as stress and phytohormones. The collected results indicate that chloroplasts could cooperate with other redox sources (e.g., mitochondria) and signaling molecules to initiate the committed steps of leaf senescence for a best use of the recycled nutrients in plant reproduction." @default.
- W2983722169 created "2019-11-22" @default.
- W2983722169 creator A5002305226 @default.
- W2983722169 creator A5011243690 @default.
- W2983722169 creator A5040366436 @default.
- W2983722169 creator A5063997603 @default.
- W2983722169 date "2019-11-12" @default.
- W2983722169 modified "2023-10-16" @default.
- W2983722169 title "Leaf Senescence: The Chloroplast Connection Comes of Age" @default.
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