Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Abscisic acid light

Whenham, R.J., Fraser, R.S.S., Brown, L.P. Payne, J.A. (1986). Tobacco-mosaic-virus-induced increase in abscisic-acid concentration in tobacco leaves Intracellular location in light and dark-green areas, and relationship to symptom development. Planta, 168, 592-8. [Pg.10]

Physiologically, violaxanthin is an important component of the xanthophyU cycle a high light stress-induced de-epoxidation of the violaxanthin pool to the more photoprotective zeaxanthin is mediated by violaxanthin de-epoxidase (VDE). Violaxanthin and neoxanthin, an enzymatically (NXS)-produced structural isomer, are the precursors for the abscisic acid (ABA) biosynthetic pathway (Figure 5.3.1, Pathway 4 and Figure 5.3.2). In non-photosynthetic tissues, namely ripe bell peppers, antheraxanthin and violaxanthin are precursors to the red pigments, capsanthin and capsorubin, respectively (Figure 5.3.3B). [Pg.368]

Thompson, A. J., A. C. Jackson et al. (2000a). Abscisic acid biosynthesis in tomato Regulation of zeaxanthin epoxidase and 9-cw-epoxycarotenoid dioxygenase mRNAs by light/dark cycles, water stress and abscisic acid. Plant Mol. Biol. 42(6) 833-845. [Pg.415]

Furthermore, many carotenoid metabolites exist that have distinct functions. One such example shown in Fig. 3 is retinal, the chromophore of visual pigments (rhodopsins) and the light-driven proton pump, bacteriorhodopsin. Other examples are the plant hormone, abscisic acid, or volatile compounds that contribute to the fragrance of roses, for example. [Pg.230]

The most likely precursors of abscisic acid (44) are 9 -Z-violaxanthin (45) and 9-Z-neoxanthin (46). -Violaxan-thin (3) is converted to 9 -Z-neoxanthin in fluridone-treated etiolated plants of Lycopersicon and Phaseolus seedlings following exposure to light (Parry and Morgan, 1991). Cleavage of these xanthophylls across the 11,12- (11, 12 -) double bond may produce xanthoxin, which is readily converted to abscisic acid by plant tissues. Xanthoxin (47) serves as a source of abscisic acid in tomato and wheat. The epoxide oxygen atom becomes the tertiary hydroxyl oxygen atom of abscisic acid. [Pg.501]

X 10" M sharply decreased auxin levels. In seedlings of Amaranthus caudatus the inhibition of light-induced beta-cyanin synthesis by abscisic acid was antagonized by several phenols including coumarin (maximal effect at 10 M). ... [Pg.307]

Kohler K-H, Dorfler M, Goring H (1980) The influence of light on the cytokinin content of Amaranthus seedlings. Biol Plant 22 128-134 Kondo K, Watanable A, Imaseki H (1975) Relationships in actions of indoleacetic acid, benzyladenine and abscisic acid in ethylene production. Plant Cell Physiol 16 1001-1007... [Pg.70]


See other pages where Abscisic acid light is mentioned: [Pg.83]    [Pg.354]    [Pg.390]    [Pg.105]    [Pg.115]    [Pg.1761]    [Pg.326]    [Pg.13]    [Pg.268]    [Pg.70]    [Pg.77]    [Pg.106]    [Pg.225]    [Pg.6]    [Pg.341]    [Pg.115]    [Pg.28]    [Pg.32]    [Pg.36]    [Pg.294]    [Pg.848]    [Pg.5]    [Pg.80]    [Pg.827]    [Pg.56]    [Pg.3]    [Pg.86]    [Pg.430]    [Pg.499]    [Pg.213]    [Pg.4]    [Pg.3162]    [Pg.3321]    [Pg.211]    [Pg.1585]    [Pg.3591]    [Pg.4625]    [Pg.21]    [Pg.32]    [Pg.49]    [Pg.66]    [Pg.67]    [Pg.71]   
See also in sourсe #XX -- [ Pg.32 ]




SEARCH



Abscisic

Abscisic acid

© 2024 chempedia.info