How To Use Senescence In A Sentence
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Cytokinins may reduce the effect of sugars on acclimation processes in leaves, as elevated cytokinins enhance greening and leaf protein levels, and antagonize senescence responses.
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In a seminal article, Leopold defined senescence in plant cells, along the lines previously proposed by Medawar, as ‘the deteriorative processes that are natural causes of death’.
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Senescence represents the last stage of flower development, ultimately culminating in the death of the petals.
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Although we all have a terminal disease called senescence, he's been living with a different sort of knowledge of how he might die than the rest of us have.
The Speculist: Hedging Our Bets
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Second, the tissues that have been through programmed senescence and death, instead of disappearing through post-mortem decay, persist as mummified corpses - namely as wood.
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Ceramide is a lipid molecule naturally present in the cell's plasma membrane and controls cell functions, including cell aging, or senescence.
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These findings represent one of the first studies to identify a protein that plays a role in mediating both a postmating, prezygotic isolation pathway and reproductive senescence.
ScienceBlogs Channel : Physical Science
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It is possible that at the approach of senescence he may recant, forgive his enemies, make his peace with the world and become a benevolent father to his nation.
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Therefore, sufficient nitrogenous fertilizer is an essential way to prevent early senescence period of wheat growth.
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Behind this zone of environmental invasion is a wave of cell senescence, death and necrotrophic disappearance.
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Oxidative processes during senescence involve an increase in enzyme activities generating oxygen radicals and superoxide ions.
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The gene is involved in senescence, a process that is thought to ensure that aging cells do not pass on harmful mutations.
Canadian Fashion History
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The degradation of proteins and the remobilization of amino acids to developing tissues is a prominent process during senescence.
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The membranes of plant cells constitute a valuable store of lipid which can be mobilized to provide energy for the senescence process.
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The vegetative tissues of perennials may also be systemically less sensitive to senescence signals.
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I would posit that the low-lifespan-after-senescence-onset would likely have a similar effect -- heterozygotic organisms (and maybe the homozygotes too) may have an advantage in terms of metabolism or ability to reproduce or something.
Boing Boing
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In the absence of water deficit, leaf water potential changes very little, or not at all, during senescence in species where the life span of leaves is terminated by abscission, as in soybeans and other dicots.
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In many cases the plant exhibits symptoms similar to those seen during leaf senescence before cell death occurs.
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This would allow direct measurement of how far senescence in the original population had been caused by accumulation of partially recessive mutations.
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Senescence leads to reproduction and the process of rejuvenescence in each asexual cycle carries the organism back to the same stage of youth.
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Although it is characterized as being a deterioration process, senescence is considered to be a highly evolved genetic process.
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Floral senescence in many species is regulated by ethylene biosynthesis.
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An even later flight to assess late senescence of the cereal crops might be undertaken this year.
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This pathway may also be involved in the senescence process where it may be required for recycling nitrogen from proteins.
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In plants, senescence is accompanied by morphological changes and/or alterations in biochemical and biophysical properties of metabolism.
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There is, however, growing evidence that specific proteases may also act as mediators of signal transduction or effectors of programmed cell death during plant senescence.
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The fate of rubisco during leaf senescence has been intensively studied and the nitrogen from this source has been shown to be extensively reutilized in the synthesis of proteins in seeds and perennating organs.
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The great mass of curiously simple yet most striking structures that girdle the summit of the rock and form the platform beneath the church, though built at different times, have joined in one consenescence and now present the appearance of one of those cities that dwell in the imagination when reading of "many tower'd Camelot" or the turreted walls of fairyland.
Normandy, Illustrated, Complete
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The quality or state of being in a place; local relation; position or location; whereness. “… would then comport my further transformation into one of those beasts I define as awake by virtue of their ubication in sleep’s interior.” senescence.
Continuing to Improve My Vocabulary « So Many Books
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These cells then enter a non-dividing state, termed senescence, which can lead to irreversible cell death.
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Additional carbon would also be released into the rhizosphere with border cell senescence and death.
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A pretreatment of cold-induction temperatures had little effect on the course of tissue senescence under these conditions.
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But most healthy mammalian cells managed just a few dozen divisions before they stopped, a process known as replicative senescence.
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Among these are the onset of monocarpic senescence, floral induction and the response of shoot growth to nitrate availability.
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This suggests that glucose derepression is a permissive factor for clonal senescence.
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They produce numerous biological effects including promotion of leaf senescence and abscission, stomatal closure, inhibition of root growth, and germination of non-dormant seeds.
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The reddish colour of the depistillated flower and its peduncle is a response to high light intensities during anthesis and should not be interpreted to indicate senescence.
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Natural senescence of even-aged stands can be a factor in dieback of forest trees; an example in the Sonoran Desert is Carnegiea gigantea.
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The change was called senescence, or sanctification.
DEEP DOMAIN
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Luigi Cornaro's Discorsi della vita sobria (1558) represents a Renaissance combination of Cicero's ide - alization of senescence and a simplified Galenic regimen.
LONGEVITY
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That process is called senescence—when the cells stop dividing permanently, or they undergo apoptosis the cell death we described earlier in the book, in which they’re broken up and reabsorbed.
You Staying Young
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In mesophyll cells, chloroplasts are dismantled in an early phase of senescence, while mitochondria remain functional.
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High sugar concentration represses expression of genes for photosynthetic components, which leads to the acceleration of senescence and re-translocation of nitrogenous compounds.
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Photosynthate supply and phytohormones, particularly cytokinins, interact with nitrogen supply through signal transduction pathways to control the expression of photosynthesis genes and development and senescence of leaves.
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Strains with mutations in both genes are very sensitive to DNA damaging agents, have very short telomeres, and undergo cellular senescence.
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Among several mutations rumoured to alter senescence are the clavata mutants.
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Most young, healthy cells divide continuously in order to keep body tissues and organs functioning properly, but eventually stop splitting—a state called senescence—and are replaced by others.
Cell Study Finds a Way to Slow Ravages of Age
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Mortality barriers to human cell immortalization and effectors of replicative cellular senescence in human cells
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So, when a telomere gets short, that's when either senescence or apoptosis is triggered.
Carol W. Greider - Interview
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Senescence is the syndrome caused by the functional decline and physiological disorder during the organism deterioration.
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It was also important to determine the degree of universality of the correlative relationships between free amino acid levels and leaf senescence.
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This would allow direct measurement of how far senescence in the original population had been caused by accumulation of partially recessive mutations.
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The quality or state of being in a place; local relation; position or location; whereness. “… would then comport my further transformation into one of those beasts I define as awake by virtue of their ubication in sleep’s interior.” senescence.
Continuing to Improve My Vocabulary « So Many Books
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Ethylene production from whole flowers, petals, and the gynoecium (ovary plus styles) was examined at a given time of senescence.
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Music was for kids, and all the old geniuses that I had revered had either become defunct, died or fallen into senescence.
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Normal diploid human cells multiply for a finite number of generations and then enter a state of replicative senescence.
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It is possible that at the approach of senescence he may make his peace with the world and become a benevolent father to his nation.
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Second, the tissues that have been through programmed senescence and death, instead of disappearing through post-mortem decay, persist as mummified corpses - namely as wood.
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The mechanism of senescence - or premature cell aging - can have an anticancer effect.
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Even in the late stages of leaf senescence, the chloroplasts of guard cells remain green and functional.
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The terms senescence and programmed cell death have led to some confusion.
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We have devised a functional approach to clone genes involved in the regulation of cell growth and senescence.
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Autophagy of entire chloroplasts during leaf senescence would cause a continuous decrease in the number of plastids per mesophyll cell.
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It follows from the conclusion reached above that the physiological changes that occur during senescence are those of viable cells and tissues.
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A team of international researchers, working for the US Department of Agriculture and led by Dr Cai-Zhong Jiang, a plant physiologist at the University of California-Davis, has been experimenting with methods to forestall the natural ageing process in plants - called "senescence" - and have found that TDZ, when added to water in concentrations of five-10 parts per million, can achieve
Life and style | guardian.co.uk
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Moreover, inhibition of the cysteine protease activity by chemical inhibitors suppressed the leaf senescence process.
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Ethylene is involved in many biological processes, like fruit ripening, flower and leaf abscission, senescence, many stress acclimations, and growth.
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MRC-5 cells, which grow adherently in culture and exhibit fibroblast morphology, may double in population size 42 to 46 times before the onset of senescence.
Undefined
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In leaf tissue, the first outwardly visible signs of senescence are declining rates of photosynthesis and loss of chlorophyll.