Abstract
A brief account is given of recent research on abscisic acid and the protection which is conferred by this naturally occurring growth hormone inhibitor to plants when they are exposed to various types of physiological stress is discussed. The discovery in the Agricultural Research Council Unit at Wye College of another potent growth hormone inhibitor, which is produced when certain xanthophyll epoxides, e. g. violaxanthin, are exposed to light is described. This inhibitor has been characterized as 2-
cis
,4-
trans
-5- ( 1', 2'-epoxy- 4'-hydroxy- 2',6',6'-trimethyl-1'-cyclohexyl)-3-methylpentadienal and has been named xanthoxin. Its possible role as one of the complex chemicals which operate in the hormonal control of plant growth is discussed. A number of synthetic growth retardants and recent work on their mode of action is reviewed.
Cited by
10 articles.
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