Overexpression of MdMIPS1 enhances salt tolerance by improving osmosis, ion balance, and antioxidant activity in transgenic apple
文献类型： 外文期刊
作者： Hu, Lingyu 1 ; Zhou, Kun 1 ; Liu, Yuan 1 ; Yang, Shulin 1 ; Zhang, Jingyun 1 ; Gong, Xiaoqing 1 ; Ma, Fengwang 1 ;
作者机构： 1.Northwest A&F Univ, Coll Hort, State Key Lab Crop Stress Biol Arid Areas, Shaanxi Key Lab Apple, Yangling 712100, Shaanxi, Peoples R China
2.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr,Guangdong Key Lab Trop & Subtrop Fruit, Guangzhou 510640, Peoples R China
关键词： Apple; MdMIPS1; myo-inositol; Salt tolerance
期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）
ISSN： 0168-9452
年卷期： 2020 年 301 卷
页码：
收录情况： SCI
摘要： Myo-inositol and its derivatives play vital roles in plant stress tolerance. Myo-inositol-1-phosphate synthase (MIPS) is the rate-limiting enzyme of myo-inositol biosynthesis. However, the role of apple MIPS-mediated myoinositol biosynthesis in stress tolerance remains elusive. In this study, we found that ectopic expression of MdMIPS1 from apple increased myo-inositol content and enhanced tolerance to salt and osmotic stresses in transgenic Arabidopsis lines. In transgenic apple lines over-expressing MdMIPS1, the increased myo-inositol levels could promote accumulation of other osmoprotectants such as glucose, sucrose, galactose, and fructose, to alleviate salinity-induced osmotic stress. Also, it was shown that overexpression of MdMIPS1 enhanced salinity tolerance by improving the antioxidant system to scavenge ROS, as well as Na+ and K+ homeostasis. Taken together, our results revealed a protective role of MdMIPS1-mediated myo-inositol biosynthesis in salt tolerance by improving osmotic balance, antioxidant defense system, and ion homeostasis in apple.
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