Induction of (+)-abscisic acid 8′ hydroxylase by (+)-abscisic acid in cultured maize cells
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چکیده
منابع مشابه
Asymmetrical ligand binding by abscisic acid 8'-hydroxylase.
Abscisic acid (ABA), a plant stress hormone, has a chiral center (C1') in its molecule, yielding the enantiomers (1'S)-(+)-ABA and (1'R)-(-)-ABA during chemical synthesis. ABA 8'-hydroxylase (CYP707A), which is the major and key P450 enzyme in ABA catabolism in plants, catalyzes naturally occurring (1'S)-(+)-enantiomer, whereas it does not recognize naturally not occurring (1'R)-(-)-enantiomer ...
متن کاملArabidopsis CYP707As encode (+)-abscisic acid 8'-hydroxylase, a key enzyme in the oxidative catabolism of abscisic acid.
Abscisic acid (ABA) is involved in a number of critical processes in normal growth and development as well as in adaptive responses to environmental stresses. For correct and accurate actions, a physiologically active ABA level is controlled through fine-tuning of de novo biosynthesis and catabolism. The hydroxylation at the 8'-position of ABA is known as the key step of ABA catabolism, and thi...
متن کامل8[prime]-Methylene Abscisic Acid (An Effective and Persistent Analog of Abscisic Acid).
We report here the synthesis and biological activity of a new persistent abscisic acid (ABA) analog, 8[prime]-methylene ABA. This ABA analog has one additional carbon atom attached through a double bond to the 8[prime]-carbon of the ABA molecule. (+)-8[prime]-Methylene ABA is more active than the natural hormone (+)-ABA in inhibiting germination of cress seed and excised wheat embryos, in reduc...
متن کاملTurion Induction in Spirodela polyrrhiza by Abscisic Acid.
In an earlier publicationi (2) we found that dormant bodies called turions can be induced in some clones of Spirodela polyrrhiiza (L.) Schleid. by a number of environmental manipulations. WVe nlOw report the formation of turions under nioninductive environmental conditions 1b abscisic acid (ABA) in concentrations as low as 0.01 /.g/ml within 10 days. Clones of Spirodela polyrrhiza were grown in...
متن کاملZmCPK11 is involved in abscisic acid-induced antioxidant defence and functions upstream of ZmMPK5 in abscisic acid signalling in maize
Calcium-dependent protein kinases (CDPKs) have been shown to be involved in abscisic acid (ABA)-mediated physiological processes, including seed germination, post-germination growth, stomatal movement, and plant stress tolerance. However, it is not clear whether CDPKs are involved in ABA-induced antioxidant defence. In the present study, the role of the maize CDPK ZmCPK11 in ABA-induced antioxi...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 1997
ISSN: 0022-0957,1460-2431
DOI: 10.1093/jxb/48.10.1787