Özet:

Abscisic acid (ABA) is an important phytohormone that regulates a lot of physiological, biochemical and molecular processes during plants life and response stress conditions. In this paper, Arabidopsis thaliana salt overly sensitive (sos5) mutant which known hyper sensitive to NaCI stress was used to investigate ABA regulation. Because of this, ABA depended genes determined by q-RT PCR method under 2h. 100 mM NaCI stress. Findings indicated that RD29A, RD 29B and RD22 which ABA dependent gene expressions were highly lower than Col-gl (wild type); however ERD1 which ABA in depended gene expression was higher than WT. Based on these results, we suggest that defect of ABA responses gene regulation might be responsible for hypersensitivity to Arabidopsis sos5 mutant under salt stress.

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