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Bulletin of Botanical Research ›› 2019, Vol. 39 ›› Issue (1): 104-112.doi: 10.7525/j.issn.1673-5102.2019.01.013

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Relationship between H2S and ABA Signaling in Arabidopsis thaliana under Drought Stress

ZHAO Min1, WANG Yue-Xuan1, XU Yun-Fei2, ZHAO Qi-An1, LIU Bo1, YANG Ning1   

  1. 1. College of Life Science, Northwest Normal University, Lanzhou 730070;
    2. Xinyang Agriculture and Forestry University, Xinyang 464000
  • Received:2018-09-04 Online:2019-01-15 Published:2019-01-31
  • Supported by:
    National Natural Science Foundation of China(31660116)

Abstract: With the seedlings of wild type Arabidopsis thaliana(WT), hydrogen sulfide(H2S) synthase deletion mutant lcd, abscisic acid(ABA) deletion mutant aba1, 0.3 mol·L-1 mannitol simulated drought stress, we studied the effects of drought stress on ABA content and H2S content, analyzed their roles and signal relationships in drought tolerance. Drought stress significantly increased the LCD and ABA1 gene relative expressions, contents of H2S and ABA; Drought stress significantly inhibited the seed germination of lcd and aba1 mutants; Application of NaHS and ABA significantly increased the endogenous H2S content in WT under drought stress; Application of NaHS could promote the endogenous H2S production in WT, lcd and aba1, the relative expression of LCD and ABA1 also up-regulated under drought stress. While the application of ABA increased the H2S content and the LCD, ABA1 relative expressions in WT and aba1 under drought stress, but had no significant effect on the H2S content and LCD relative expression in lcd. The results showed that the signal molecules H2S and ABA played a vital role response to the drought stress in Arabidopsis, and H2S is located at downstream of ABA to participated in the regulation of signaling process.

Key words: Arabidopsis thaliana, drought stress, hydrogen sulfide, abscisic acid

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