Overexpression of AtMYB52 confers ABA hypersensitivity and drought tolerance

We carried out activation tagging screen to isolate genes regulating abscisic acid (ABA) response. From the screen of approximately 10,000 plants, we isolated ca 100 ABA response mutants. We characterized one of the mutants, designated ahs1, in this study. The mutant is ABA-hypersensitive, and AtMYB52 was found to be activated in the mutant. Overexpression analysis to recapitulate the mutant phenotypes demonstrated that ATMYB confers ABA-hypersensitivity during postgermination growth. Additionally, AtMYB52 overexpression lines were drought-tolerant and their seedlings were salt-sensitive. Changes in the expression levels of a few genes involved in ABA response or cell wall biosynthesis were also observed. Together, our data suggest that AtMYB52 is involved in ABA response. Others previously demonstrated that AtMYB52 regulates cell wall biosynthesis; thus, our results imply a possible connec-tion between ABA response and cell wall biosynthesis.

• Publication year

  2011

• Venue

  Molecules and Cells

• Publication date

  2011-03-09

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1007/s10059-011-0300-7PMID 21399993PMCID PMC3887605
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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