期刊
MOLECULES AND CELLS
卷 31, 期 5, 页码 447-454出版社
KOREAN SOC MOLECULAR & CELLULAR BIOLOGY
DOI: 10.1007/s10059-011-0300-7
关键词
abscisic acid (ABA); activation tagging; cell wall; MYB protein; stress response
资金
- Ministry of Education, Science and Technology (MEST) [CG2112, 2008-0059137]
- National Research Foundation of Korea [2008-0059137] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Rural Development Administration (RDA), Republic of Korea [07-2007-04-002-00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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