SGD1, a key enzyme in tocopherol biosynthesis, is essential for plant development and cold tolerance in rice

文献类型： 外文期刊

第一作者： Wang, Di

作者： Wang, Di;Wang, Yunlong;Long, Wuhua;Niu, Mei;Zhao, Zhigang;Teng, Xuan;Zhu, Xiaopin;Zhu, Jianping;Hao, Yuanyuan;Wang, Yongfei;Liu, Yi;Jiang, Ling;Wang, Yihua;Wan, Jianmin;Wan, Jianmin

作者机构：

关键词： Dwarfism;Tocopherol;Cold stress;Oryza sativa;Homogentisate phytyltransferase

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

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收录情况： SCI

摘要： Tocopherols, a group of Vitamin E compounds, are essential components of the human diet. In contrast to well documented roles in animals, the functions of tocopherols in plants are less understood. In this study, we characterized two allelic rice dwarf mutant lines designated sgd1-1 and sgd1-2 (small grain and dwarf1). Histological observations showed that the dwarf phenotypes were mainly due to cell elongation defects. A map based cloning strategy and subsequent complementation test showed that SGD1 encodes homogentisate phytyltransferase (HPT), a key enzyme in tocopherol biosynthesis. Mutation of SGD1 resulted in tocopherol deficiency in both sgdl mutants. No oxidant damage was detected in the sgdl mutants. Further analysis showed that sgd1-2 was hypersensitive to cold stress. Our results indicate that SGD1 is essential for plant development and cold tolerance in rice.

分类号： Q94

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