期刊
PLANT SCIENCE
卷 260, 期 -, 页码 90-100出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2017.04.008
关键词
Dwarfism; Tocopherol; Cold stress; Oryza sativa; Homogentisate phytyltransferase
资金
- 863 Program [2014AA10A603-15]
- National Key Research and Development Program of China [2016YFD0100903]
- National Science and Technology Support Program [2013BAD01B02-16]
- Jiangsu Science and Technology Development Program [BE2013301]
- Key program of Science and Technology of Anhui Province [16030701068]
- Key Laboratory of Biology, Genetics and Breeding of Japonica Rice in the Mid-lower Yangtze River, Ministry of Agriculture, P.R. China
- Jiangsu Collaborative Innovation Center
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.
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