Transcription of Leaf senescence: progression, regulation, and application
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Leaf senescence: progression, regulation, and application
REVIEWOpen AccessLeaf senescence: progression, regulation, and applicationYongfeng Guo1 , Guodong Ren2 , Kewei Zhang3 , Zhonghai Li4 , Ying Miao5*and Hongwei Guo6*AbstractLeaf senescence, the last stage of leaf development, is a type of postmitotic senescence and is characterized by thefunctional transition from nutrient assimilation to nutrient remobilization which is essential for plants fitness. Theinitiation and progression of leaf senescence are regulated by a variety of internal and external factors such as age,phytohormones, and environmental stresses. Significant breakthroughs in dissecting the molecular mechanismsunderpinning leaf senescence have benefited from the identification of senescence-altered mutants throughforward genetic screening and functional assessment of hundreds ofsenescence-associated genes(SAGs)viareversegenetic research in model plantArabidopsis thalianaas well as in crop plants.
degeneration is initiated, paralleled by catabolism of macromolecules, including nucleic acids, proteins and lipids. The released nutrients are exported to other de-veloping organs, such as new buds, young leaves, flowers
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