期刊
GENES & DEVELOPMENT
卷 23, 期 15, 页码 1805-1817出版社
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.1812409
关键词
Rice; zinc finger protein; drought tolerance; salt tolerance; stomatal aperture; hydrogen peroxide
资金
- National Natural Science Foundation of China [30730058, 30821004]
- Ministry of Science and Technology of China [2006CB100100, 2006AA10A102]
- Ministry of Agriculture of China [2009ZX08009-067B]
- Chinese Academy of Sciences [KSCX2-YW-N-011]
- Shanghai Science and Technology Development Fund [09DJ1400503]
Abiotic stresses, such as drought and salinity, lead to crop growth damage and a decrease in crop yields. Stomata control CO2 uptake and optimize water use efficiency, thereby playing crucial roles in abiotic stress tolerance. Hydrogen peroxide (H2O2) is an important signal molecule that induces stomatal closure. However, the molecular pathway that regulates the H2O2 level in guard cells remains largely unknown. Here, we clone and characterize DST (drought and salt tolerance)-a previously unknown zinc finger transcription factor that negatively regulates stomatal closure by direct modulation of genes related to H2O2 homeostasis-and identify a novel pathway for the signal transduction of DST-mediated H2O2-induced stomatal closure. Loss of DST function increases stomatal closure and reduces stomatal density, consequently resulting in enhanced drought and salt tolerance in rice. These findings provide an interesting insight into the mechanism of stomata-regulated abiotic stress tolerance, and an important genetic engineering approach for improving abiotic stress tolerance in crops.
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