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Arabidopsis enhanced drought tolerance1/HOMEODOMAIN GLABROUS11 confers drought tolerance in transgenic rice without yield penalty

文献类型： 外文期刊

作者： Yu, Linhui 1 ; Chen, Xi 1 ; Wang, Zhen 1 ; Wang, Shimei 2 ; Wang, Yuping 3 ; Zhu, Qisheng 2 ; Li, Shigui 3 ; Xiang, Cheng 1 ;

作者机构： 1.Univ Sci & Technol China, Sch Life Sci, Hefei 230027, Peoples R China

2.Anhui Agr Univ, Coll Agron, Hefei 230031, Peoples R China

3.Sichuan Agr Univ, Rice Res Inst, Chengdu 611130, Peoples R China

4.Anhui Acad Agr Sci, Rice Res Inst, Hefei 230031, Peoples R China

关键词： Arabidopsis;drought;drought

期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.34； 五年影响因子：8.972 ）

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收录情况： SCI

摘要： Enhancing drought tolerance without yield decrease has been a great challenge in crop improvement. Here, we report the Arabidopsis (Arabidopsis thaliana) homodomain-leucine zipper transcription factor Enhanced Drought Tolerance/HOMEODOMAIN GLABROUS11 (EDT1/HDG11) was able to confer drought tolerance and increase grain yield in transgenic rice (Oryza sativa) plants. The improved drought tolerance was associated with a more extensive root system, reduced stomatal density, and higher water use efficiency. The transgenic rice plants also had higher levels of abscisic acid, proline, soluble sugar, and reactive oxygen species-scavenging enzyme activities during stress treatments. The increased grain yield of the transgenic rice was contributed by improved seed setting, larger panicle, and more tillers as well as increased photosynthetic capacity. Digital gene expression analysis indicated that AtEDT1/HDG11 had a significant influence on gene expression profile in rice, which was consistent with the observed phenotypes of transgenic rice plants. Our study shows that AtEDT1/HDG11 can improve both stress tolerance and grain yield in rice, demonstrating the efficacy of AtEDT1/HDG11 in crop improvement.

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