Overexpression of AtOxR gene improves abiotic stresses tolerance and vitamin C content in Arabidopsis thaliana
文献类型： 外文期刊
作者： Bu, Yuanyuan 1 ; Sun, Bo 1 ; Zhou, Aimin 1 ; Zhang, Xinxin 1 ; Takano, Testuo 3 ; Liu, Shenkui 1 ;
作者机构： 1.Northeast Forestry Univ, Alkali Soil Nat Environm Sci Ctr, Minist Educ, Key Lab Saline Alkali Vegetat Ecol Restorat Oil F, Harbin 150040, Peoples R China
2.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Rd 232 Hesong, Harbin 150070, Peoples R China
3.Univ Tokyo, ASNESC, Nishitokyo, Tokyo 1880002, Japan
关键词： Abiotic stresses; L-ascorbic acid (AsA, Vitamin C); Hydrogen peroxide (H2O2); Transgenic plants
期刊名称：BMC BIOTECHNOLOGY （ 影响因子：2.563； 五年影响因子：3.292 ）
ISSN： 1472-6750
年卷期： 2016 年 16 卷
页码：
收录情况： SCI
摘要： Background: Abiotic stresses are serious threats to plant growth, productivity and result in crop loss worldwide, reducing average yields of most major crops. Although abiotic stresses might elicit different plant responses, most induce the accumulation of reactive oxygen species (ROS) in plant cells leads to oxidative damage. L-ascorbic acid (AsA, vitamin C) is known as an antioxidant and H2O2-scavenger that defends plants against abiotic stresses. In addition, vitamin C is also an important component of human nutrition that has to be obtained from different foods. Therefore, increasing the vitamin C content is important for improving abiotic stresses tolerance and nutrition quality in crops production. Results: Here, we show that the expression of AtOxR gene is response to multiple abiotic stresses (salt, osmotic, metal ion, and H2O2 treatment) in both the leaves and roots of Arabidopsis. AtOxR protein was localized to the Endoplasmic Reticulum (ER) in yeast and Arabidopsis cells by co-localization analysis with ER specific dye. AtOxR-overexpressing transgenic Arabidopsis plants enhance the tolerance to abiotic stresses. Overexpression of AtOxR gene resulted in AsA accumulation and decreased H2O2 content in transgenic plants. Conclusions: In this study, our results show that AtOxR responds to multiple abiotic stresses. Overexpressing AtOxR improves tolerance to abiotic stresses and increase vitamin C content in Arabidopsis thaliana. AtOxR will be useful for the improvement of important crop plants through moleculer breeding.
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