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Overexpression of a homopeptide repeat-containing bHLH protein gene (OrbHLH001) from Dongxiang Wild Rice confers freezing and salt tolerance in transgenic Arabidopsis

文献类型： 外文期刊

作者： Li, Fei 2 ; Guo, Siyi 2 ; Zhao, Yuan 1 ; Chen, Dazhou 3 ; Chong, Kang 1 ; Xu, Yunyuan 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Photosynth & Environm Mol Physiol, Inst Bot, Beijing 100093, Peoples R China

2.Chinese Acad Sci, Grad Univ, Beijing 100093, Peoples R China

3.Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang 330200, Peoples R China

关键词： cold tolerance;salt tolerance.;bHLH;OrbHLH001;RCPs;Internet resource.

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

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收录情况： SCI

摘要： 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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