期刊
PLANT SIGNALING & BEHAVIOR
卷 8, 期 12, 页码 -出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.26643
关键词
OsKAT; shaker like potassium channel; stomatal movement; guard cell; inward rectifier potassium channel
资金
- Research Program for Agricultural Science and Technology Development of National Academy of Agricultural Science [PJ008598]
- Next-Generation BioGreen 21 Program (Plant Molecular Breeding Center) of the Rural Development Administration of Korea [PJ00802107]
AtKAT1 plays roles as a major channel to uptake K+ in guard cell when stomata open in dicot model plant Arabidopsis. In a recent publication, we isolated 3 KAT-like potassium channels in rice. We expressed them in CHO cell to identify electrophysiological characteristics of the channels. OsKAT2 showed much bigger inwardly rectifying potassium channel activities among them. The histochemical X-glu staining of transgenic rice leaf blades expressing beta-glucuronidase fused with OsKAT2 promoter showed that the OsKAT2 is dominantly expressed in rice guard cell. These findings indicate that OsKAT2 may be a functional ortholog of AtKAT1 in rice. Thus this gene will be the prime target for engineering the guard cell movement to improve drought tolerance in monocot plants, including most major crops.
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