Abstract
In cultivation of tomato, several environmental stresses are the important factors to affect quality and yield of fruit. Abscisic acid (ABA) is known to play important roles in many stress responses of plants. In this study, we investigate how the endogenous ABA levels are regulated in stress responses of tomato, and try to manipulate their content by transgenic approach.
It is well known that ABA 8'-hydroxylase (CYP707A) and 9-cis-epoxycarotenoid dioxygenase (NCED) are important for the regulation of ABA levels. So we try to analyze the expression patterns of four ABA 8'-hydroxylase genes (LeABA8'h1-4) and two NCED genes (LeNCED1-2) in stress responses of tomato. And we found that LeNCED1, LeABA8'h1 and LeABA8'h2 play major roles in the regulation of ABA levels under water stress conditions.
