Results 261 to 270 of about 60,426 (294)

Molecular regulation of leaf senescence

Current Opinion in Plant Biology, 2003
Leaf senescence is a process of programmed cell death, which is induced in an age-dependent manner and by various environmental cues. The mechanisms that regulate the induction and progression of leaf senescence remain unclear because of their complexity.
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Control of Leaf Senescence by Auxins

Nature, 1959
THE considerable knowledge which has accumulated over the past thirty years suggests that differentiation, growth and senescence of plant cells is closely linked to the auxin status of the tissue. Investigations by Shoji, Addicott and Swets1 have shown that differentiating and enlarging tissues of the green leaves of Black Valentine bean contain a ...
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Molecular genetics of leaf senescence in Arabidopsis

Trends in Plant Science, 2003
Leaf senescence is a developmentally programmed degeneration process that constitutes the final step of leaf development and is controlled by multiple developmental and environmental signals. In addition to the information obtained from other plants, Arabidopsis has, as a model system, contributed to our understanding of this complex phenomenon in ...
Lim, PO, Woo, HR, Nam, HG
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Effects of senescence on chloroplasts of the tobacco leaf

Tissue and Cell, 1973
Abstract Chloroplast fine structure, oxygen evolution and plastid composition studies were made on ageing leaves over a 30-day period. Plastids in leaves which were approaching maximum levels of chlorophyll generated large numbers of alveolate suborganelles, named plastosomes, which were released into the cytoplasm. There was some evidence that these
J B, Harris, H J, Arnott
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Hormone Treatments in Studying Leaf Senescence

2018
As the last stage of plant development, senescence can be regulated by a large number of signals such as aging, reproductive growth, nutrient availability, and stresses. Various plant hormones have been shown to be involved in regulating plant senescence.
Zenglin, Zhang, Yongfeng, Guo
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Leaf Senescence: Signals, Execution, and Regulation

2005
Leaf senescence is a type of postmitotic senescence. The onset and progression of leaf senescence are controlled by an array of external and internal factors including age, levels of plant hormones/growth regulators, and reproductive growth. Many environmental stresses and biological insults such as extreme temperature, drought, nutrient deficiency ...
Yongfeng, Guo, Susheng, Gan
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Peptide signals regulating leaf senescence

Annals of Botany
Abstract Leaf senescence is an essential physiological process which is accompanied by the transfer and recycling of nutrients from ageing organs to growing tissues. This intricate process is finely orchestrated by multiple endogenous and exogenous elements, including leaf age, environmental signals and developmental cues.
Xueting Li, Xiaolin Si, Zhenbiao Zhang, Qi Ni, Wei Li, Zenglin Zhang, Jie Wang, Yongfeng Guo   +7 more
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The Role of Free Radicals in Leaf Senescence

Gerontology, 2009
Decreased catalase activity is a consistent feature of leaf senescence. Although not as well documented, superoxide dismutase appears generally to decrease during leaf senescence. These changes suggest that free radical levels are likely to be higher in senescing tissues.
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Leaf Senescence

Annual Review of Plant Physiology, 1980
J. L. Stoddart, H. Thomas
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PHOTOCONTROL OF LEAF SENESCENCE

Photochemistry and Photobiology, 1984
U. C. Biswal, Basanti Biswal
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