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Beschreibung
For many, the terms aging, maturation and senescence are synonymous and used interchangeably, but they should not be. Whereas senescence represents an endogenously controlled degenerative programme leading to plant or organ death, genetiC aging encompasses a wide array of passive degenerative genetiC processes driven primarily by exogenous factors (Leopold, 1975). Aging is therefore considered a… consequence of genetiC lesions that accumulate over time, but by themselves do not necessarily cause death. These lesions are probably made more severe by the increase in size and complexity in trees and their attendant physiology. Thus while the withering of flower petals following pollination can be considered senescence, the loss of viability of stored seeds more clearly represents aging (Norden, 1988). The very recent book "Senescence and Aging in Plants" does not discuss trees, the most dominant group of plants on the earth. Yet both angiospermic and gymnospermic trees also undergo the above phenomena but less is known about them. Do woody plants senesce or do they just age? What is phase change? Is this synonymous with maturation? While it is now becoming recognized that there is no programmed senescence in trees, senescence of their parts, even in gymnosperms (e. g. , needles of temperate conifers las t an average of 3. 5 years), is common; but aging is a readily acknowledged phenomenon. In theory, at least, in the absence of any programmed senescence trees should -live forever, but in practice they do not. Dieses Produkt haben wir gerade leider nicht auf Lager.
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Bis zu 50 % günstiger als neu
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Technische Daten
Erscheinungsdatum
31.10.1990
Sprache
Englisch
EAN
9780306435188
Herausgeber
Springer US
Serien- oder Bandtitel
Nato Science Series: A
Sonderedition
Nein
Seitenanzahl
462
Einbandart
Gebundene Ausgabe
Buch Untertitel
Basic and Applied Approaches
Bandzählung
186
Schlagwörter
protein patterns, nitrogen, Genotyp, Fruit, amino acids, Seed, biotechnology, Embryo, metabolism, peroxidase, Bur, seedlings, genes
Thema-Inhalt
PST - Botanik und Pflanzenwissenschaften
PSC - Entwicklungsbiologie
PSV - Zoologie und Tierwissenschaften
-.-
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