Overexpression of the Gene Confers Resistance to Salt Stress by the Induction of NCED3, an ABA Biosynthesis Enzyme.

Salt stress constitutes a major form of abiotic stress in plants. Histone modification plays an important role in stress tolerance, with particular reference to salt stress resistance. In the current study, we found that HDA15 overexpression confers salt stress resistance to young seedling stages of transgenic plants. Furthermore, salt stress induces overexpression. Transcription levels of stress-responsive genes were increased in transgenic plants overexpressing (). , an abscisic acid (ABA) biosynthetic gene, which is highly upregulated in transgenic plants, enhanced the accumulation of ABA, which promotes adaptation to salt stress. ABA homeostasis in plants is maintained by the induction of CYP707As, which optimize endogenous ABA levels. Lastly, we found that the double-mutant plants are sensitive to salt stress, indicating that interaction between HDA15 and ELONGATED HYPOCOTYL 5 (HY5) is crucial to salt stress tolerance shown by plants. Thus, our findings indicate that is crucial to salt stress tolerance in .