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Arabidopsis EDT1/HDG11 improves drought and salt tolerance in cotton and poplar and increases cotton yield in the field

文献类型： 外文期刊

作者： Yu, Lin-Hui 1 ; Wu, Shen-Jie 2 ; Peng, Yi-Shu 3 ; Liu, Rui-Na 4 ; Chen, Xi 1 ; Zhao, Ping 1 ; Xu, Ping 1 ; Zhu, Jian-Bo 4 ;

作者机构： 1.Univ Sci & Technol China, Sch Life Sci, Hefei 230026, Anhui, Peoples R China

2.Shanxi Acad Agr Sci, Cotton Res Inst, Yuncheng, Shanxi Province, Peoples R China

3.Southwest Univ, Biotechnol Res Ctr, Chongqing, Peoples R China

4.Shihezi Univ, Coll Life Sci, Shihezi, Xinjiang Provin, Peoples R China

关键词： AtHDG11;drought stress;salt stress;transgenic cotton;transgenic poplar;cotton yield

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

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收录情况： SCI

摘要： Drought and salinity are two major environmental factors limiting crop production worldwide. Improvement of drought and salt tolerance of crops with transgenic approach is an effective strategy to meet the demand of the ever-growing world population. Arabidopsis ENHANCED DROUGHT TOLERANCE1/HOMEODOMAIN GLABROUS11 (AtEDT1/HDG11), a homeodomain-START transcription factor, has been demonstrated to significantly improve drought tolerance in Arabidopsis, tobacco, tall fescue and rice. Here we report that AtHDG11 also confers drought and salt tolerance in upland cotton (Gossypium hirsutum) and woody plant poplar (Populus tomentosa Carr.). Our results showed that both the transgenic cotton and poplar exhibited significantly enhanced tolerance to drought and salt stress with well-developed root system. In the leaves of the transgenic cotton plants, proline content, soluble sugar content and activities of reactive oxygen species-scavenging enzymes were significantly increased after drought and salt stress compared with wild type. Leaf stomatal density was significantly reduced, whereas stomatal and leaf epidermal cell size were significantly increased in both the transgenic cotton and poplar plants. More importantly, the transgenic cotton showed significantly improved drought tolerance and better agronomic performance with higher cotton yield in the field both under normal and drought conditions. These results demonstrate that AtHDG11 is not only a promising candidate for crops improvement but also for woody plants.

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