期刊
PLANT CELL REPORTS
卷 29, 期 9, 页码 977-986出版社
SPRINGER
DOI: 10.1007/s00299-010-0883-z
关键词
Cold tolerance; Salt tolerance; Wild rice; bHLH; OrbHLH001; RCPs
资金
- Chinese Academy of Sciences for Key Topics in Innovation Engineering [KSCX1-YW-03]
- National Natural Science Foundation of China [30670185]
Dongxiang Wild Rice (Oryza rufipogon) is the northernmost wild rice in the world known to date and has extremely high cold tolerance and many other adversity-resistant properties. To identify the genes responsible for the high stress tolerance, we isolated and characterized a basic helix-loop-helix (bHLH) protein gene OrbHLH001 from Dongxiang Wild Rice. The gene encodes an ICE1-like protein containing multiple homopeptide repeats. Expression of OrbHLH001 is induced by salt stress and is predominant in the shoots of wild rice seedlings. Overexpression of OrbHLH001 enhanced the tolerance to freezing and salt stresses in transgenic Arabidopsis. Examination of the expression of cold-responsive genes in transgenic Arabidopsis showed that the function of OrbHLH001 differs from that of ICE1 and is independent of a CBF/DREB1 cold-response pathway.
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