The function of water-stress-inducible gene products and signal transduction in water-stress response was mainly introduced. Genes induced during water-stress conditions are thought to function not only in protecting cells from water deficit but also in the regulation of genes for signal transduction in water-stress response.At least four independent signal transduction pathways exist between the initial dehydration signal and gene expression,two are ABA independent and two are ABA dependent,one of the ABA-dependent pathways requires protein biosynthesis,one of the ABA-independent pathways overlaps with that of the cold response.