期刊
PLANT CELL REPORTS
卷 35, 期 2, 页码 357-368出版社
SPRINGER
DOI: 10.1007/s00299-015-1889-3
关键词
Brassinosteroid (BRs); Chlorophyll biosynthesis; Dwarfism; Heading date
资金
- Key Laboratory of Biology, Genetics and Breeding of Japonica Rice in Mid-lower Yangtze River, Ministry of Agriculture, P.R. China
- Jiangsu Collaborative Innovation Center for Modern Crop Production
- National Basic Research Program of China [2011CB100102]
- National Science and Technology Support Program [2013BAD01B02-16, 2011BAD35B02-02]
- Jiangsu Science and Technology Development Program [BE2014394]
- Qing Lan Project
Heading date and plant height are important determinants of yield in rice (Oryza sativa L.). In this study, we characterized a late heading, dwarf mutant known as lhdd10 selected following ethyl methane sulfonate (EMS)-treatment of ssp. indica cultivar 93-11. lhdd10 showed late heading, dwarfness and slightly darker-green leaves than wild-type 93-11 under long-day and short-day conditions. We isolated lhdd10 by map-based cloning; it encoded a putative FAD-linked oxidoreductase protein (a brassinosteroid biosynthetic gene) that localized to the nucleus. LHDD10 was constitutively expressed in various tissues, but more so in shoot apices and panicles. Our data showed that lhdd10 influences heading date by controlling the expression of heading date regulators, such as OsMADS50 in both LD and SD conditions. lhdd10 also negatively regulated expression of chlorophyll biosynthetic genes to reduce the chlorophyll content. Our data indicated that BRs play important roles in regulating heading date and chlorophyll biosynthesis. This work provides material that will allow study of how BRs regulate heading date in rice.
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