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A Vitis vinifera xanthine dehydrogenase gene, VvXDH, enhances salinity tolerance in transgenic Arabidopsis

文献类型： 外文期刊

作者： You, Shuanghong 1 ; Zhu, Bo 2 ; Wang, Feibing 2 ; Han, Hongjuan 2 ; Sun, Miao 1 ; Zhu, Hengweng 2 ; Peng, Rihe 2 ; Yao, Q 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Jiangsu, Peoples R China

2.Shanghai Acad Agr Sci, Agrobiotechnol Res Inst, Shanghai Key Lab Agr Genet & Breeding, 2901 Beidi Rd, Shanghai 201106, Peoples R China

关键词： Xanthine dehydrogenase;Arabidopsis;Transgenic plants;Salt tolerance

期刊名称：PLANT BIOTECHNOLOGY REPORTS （ 影响因子：2.01； 五年影响因子：1.907 ）

ISSN：

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收录情况： SCI

摘要： Xanthine dehydrogenase (EC1.1.1.204; XDH) plays an important role in purine catabolism that catalyzes the oxidative hydroxylation of hypoxanthine to xanthine and of xanthine to uric acid. Long attributed to its role in recycling and remobilization of nitrogen, recently, XDH is implicated in plant stress responses and acclimation, such research efforts, however, have thus far been restricted to Arabidopsis XDH-knockdown/knockout studies. This study, using an ectopic overexpression approach, is expected to provide novel findings. In this study, a XDH gene from Vitis vinifera, named VvXDH, was synthesized and overexpressed in Arabidopsis, the transgenic Arabidopsis showed enhanced salt tolerance. The VvXDH gene was investigated and the results demonstrated the explicit role of VvXDH in conferring salt stress by increasing allantoin accumulation and activating ABA signaling pathway, enhancing ROS scavenging in transgenic Arabidopsis. In addition, the water loss and chlorophyll content loss were reduced in transgenic plants; the transgenic plants showed higher proline level and lower MDA content than that of wild-type Arabidopsis, respectively. In conclusion, the VvXDH gene has the potential to be applied in increasing allantoin accumulation and enhancing the tolerance to abiotic stresses in Arabidopsis and other plants.

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