منابع مشابه
Changes in Photosystem II Photochemistry in Senescing Maple Leaves
Biochemical and functional changes in photosystem II (PSII) were investigated during natural senescence of maple (Acer platanoides L.) leaves. Three different types of senescing leaves were used: early senescent green (G), yellow green (YG) and yellow (Y). The main goal of this study was to investigate the dynamics of degradation of major photosynthetic proteins (D1, LHCII and Rubisco LSU) and ...
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Two proteases isolated from senescent oat (Avens saiva) leaves have been subjected to further study. One of these, an acid protease active at pH 4.2, is inhibited by phenylmethylsulfonyl fluoride (PMSF) but not by iodoacetamide (lAc). The other, active at pH 6.6, is inhibited by both PMSF and IAc. These results, together with previously reported evidence that mercaptoethanol stimulates the acti...
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During cotton leaf development, starch accumulation was characterized by an initial rise to a maximum at the second to the fourth leaf from the apex. Then, starch content progressively decreased with leaf age. Starch accumulation was inversely related to the ratio of amylopectin to amylose. Differences between leaves in this ratio resulted from variations in both amylose and amylopectin levels....
متن کاملStarch depletion and sugars in developing cotton leaves.
Cotton plants (cv. Coker 100) were exposed to a 14-hour dark period. Starch degradation occurred with no accumulation of sugars due mainly to translocation. Considerable amounts of starch degradation products however were detected from leaves after phloem transport was blocked. A minor component (10 to 25% of total starch) with a linear structure, amylose, was preferentially degraded, whereas t...
متن کاملLight absorption by anthocyanins in juvenile, stressed, and senescing leaves
The optical properties of leaves from five species, Norway maple (Acer platanoides L.), cotoneaster (Cotoneaster alaunica Golite), hazel (Corylus avellana L.), Siberian dogwood (Cornus alba L.), and Virginia creeper (Parthenocissus quinquefolia (L.) Planch.), differing in pigment composition and at different stages of ontogenesis, were studied. Anthocyanin absorption maxima in vivo, as estimate...
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ژورنال
عنوان ژورنال: Australian Journal of Biological Sciences
سال: 1962
ISSN: 0004-9417
DOI: 10.1071/bi9620445