Biosynthesis of abscissic acid.
The fungus Cercospora rosicola has been studied as a model system for abscissic acid biosynthesis. 1'-dDeoxyabscissic acid and 4'-hydroxy-a-ionylidene acetic acid have been identified as endogenous compounds in this fungus. The results of feeding these and other putative intermediates suggest that abscissic acid biosynthesis proceeds via the successive oxidations of a 3-methyl-5-(2',6',6'-trimethylcyclohex-2'-en-1'-yl)-2,4-pentadienyl intermediate. Preliminary results suggest that a similar pathway may operate in plants.
D000040:Abscisic Acid / Q000096:biosynthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D003509:Cyclohexanecarboxylic Acids / Q000096:biosynthesis*; D008798:Mevalonic Acid / Q000378:metabolism; D003904:Mitosporic Fungi / Q000378:metabolism*; D010944:Plants / Q000378:metabolism
D003509:Cyclohexanecarboxylic Acids; D000040:Abscisic Acid; D008798:Mevalonic Acid