Water stress abscisic acid biosynthesis

Iuchi, S., M. Kobayashi et al. (2000). A stress-inducible gene for 9-cw-epoxycarotenoid dioxygenase involved in abscisic acid biosynthesis under water stress in drought-tolerant cowpea. Plant Physiol. 123(2) 553-562. 

Qin, X. Q. and J. A. D. Zeevaart (1999). The 9-cw-epoxycarotenoid cleavage reaction is the key regulatory step of abscisic acid biosynthesis in water-stressed bean. Proc. Natl. Acad. Sci. U. S. A. 96(26) 15354-15361. 

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. 

Effects on Abscisic Acid, One of the most clearly defined effects of water stress (decreased turgor) on hormones is the enhancement of ABA biosynthesis in leaves (Wright and Hiron 1972, Milborrow 1974, Zeevaart 1980). The response is rapid and the increase in ABA content is large (Kriedemann et al. 1972, Milborrow 1974, Wright and Hiron 1972, Hiron and Wright 1973). Water stress-induced enhancement of ABA content also occurs in roots (Walton et al. 1976) but the effect is small in some cases (Milborrow and Robinson 1973). 

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