The HD-Zip I transcription factor MdHB7-like confers tolerance to salinity in transgenic apple (Malus domestica)
文献类型： 外文期刊
作者： Zhao, Shuang 1 ; Wang, Haibo 2 ; Jia, Xumei 1 ; Gao, Hanbing 1 ; Mao, Ke 1 ; Ma, Fengwang 1 ;
作者机构： 1.Northwest A&F Univ, Shaanxi Key Lab Apple, Coll Hort, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
2.Shandong Inst Pomol, Tai An, Shandong, Peoples R China
期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：4.5； 五年影响因子：4.576 ）
ISSN： 0031-9317
年卷期：
页码：
收录情况： SCI
摘要： Salinity is a major environmental constraint that substantially limits global agricultural productivity. HD-Zip I transcription factors are involved in plant responses to salt stress, but little is known about the HD-Zip I genes in apple (Malus domestica). Here, we characterized the function of an apple HD-Zip I gene (MdHB7-like) and report that its expression is induced by salt stress. To further explore its role in salt stress, we created MdHB7-like overexpressing and RNAi transgenic apple plants. The overexpression of MdHB7-like improved the photosynthetic performance and reduced ROS and Na+ accumulation under salt stress. Plants that overexpressed MdHB7-like also showed increased accumulation of proline and soluble sugars, which may have played an important role in their salt stress tolerance. RNAi suppression of MdHB7-like had the opposite effects. Together, our results demonstrate that MdHB7-like is an important regulator of salt tolerance in apple. Our results provide new insights for future research on the mechanisms by which MdHB7-like promotes salt tolerance and provide a potential target for molecular breeding in apple.
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