Oscyp71Z2 involves diterpenoid phytoalexin biosynthesis that contributes to bacterial blight resistance in rice

文献类型： 外文期刊

第一作者： Li, Wenqi

作者： Li, Wenqi;Shao, Min;Qian, Guoliang;Liu, Fengquan;Li, Wenqi;Yang, Jie;Zhong, Weigong;Li, Wenqi;Shao, Min;Qian, Guoliang;Liu, Fengquan;Okada, Kazunori;Yamane, Hisakazu

作者机构：

关键词： Oscyp71Z2;Phytoalexins;H2O2;Xoo resistance;Rice

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： 2013 年 207 卷

页码：

收录情况： SCI

摘要： Bacterial blight is one of the most destructive rice diseases, which caused by Xoo, and results in yield losses, endangering worldwide food security. Diterpenoid phytoalexins, a type of antimicrobials produced in rice, are critical for resistance to fungal and bacterial pathogens. This article reports the characterization of the cytochrome P450 gene Oscyp71Z2, which belongs to the CYP71Z subfamily. Overexpression of Oscyp71Z2 in rice enhanced resistance to Xoo at the booting stage. The accumulation of phytoalexins was rapidly and strongly induced in Oscyp71Z2-overexpressing plants, and the transcript levels of genes related to the phytoalexin biosynthesis pathway were elevated. The H2O2 concentration in Oscyp71Z2-overexpressing plants was reduced in accordance with the increase in ROS-scavenging ability due to the induction of SOD as well as POD and CAT activation. We also showed that suppression of Oscyp71Z2 had no significantly effect on disease resistance to Xoo in rice. These results demonstrated that Oscyp71Z2 plays an important role in bacterial blight resistance by regulating the diterpenoid phytoalexin biosynthesis and H2O2 generation. (C) 2013 Elsevier Ireland Ltd. All rights reserved.

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