ABA controls H 2O 2 accumulation through the induction of OsCATB in rice leaves under water stress

Nenghui Ye, Guohui Zhu, Yinggao Liu, Yingxuan Li, Jianhua ZHANG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)

Abstract

The production of both ABA and H 2O 2 is induced by drought and can act as signals under stress conditions. We investigated the relationships between ABA, H 2O 2 and catalase (CAT) in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment. As a key gene in ABA biosynthesis, OsNCED3 was significantly induced in rice by water stress treatment and such induction preceded the rapid increase in ABA. Water stress inhibited the expression of CATA and CATC but substantially enhanced the expression of CATB. Exogenously applied ABA promoted the expression of CATB also and inhibited the expression of CATC in a concentration-dependent manner. When ABA production was inhibited by using ABA biosynthesis inhibitors nordihydroguaiaretic acid and tungstate, expression of CATB was also subdued while CATC was enhanced under the water stress. Accumulation of H 2O 2 was also reduced when endogenous ABA production was inhibited and showed a correlation with the total activity of catalases. Our results suggest that water stress-induced ABA prevents the excessive accumulation of H 2O 2, through the induction of the expression of CATB gene during water stress.

Original languageEnglish
Pages (from-to)689-698
Number of pages10
JournalPlant and Cell Physiology
Volume52
Issue number4
DOIs
Publication statusPublished - Apr 2011

Scopus Subject Areas

  • Physiology
  • Plant Science
  • Cell Biology

User-Defined Keywords

  • ABA
  • Catalases
  • Hydrogen peroxide
  • Reactive oxygen species
  • Rice (Oryza sativa)
  • Water stress

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