Green-revertible Chlorina 1 (grc1) is required for the biosynthesis of chlorophyll and the early development of chloroplasts in rice
文献类型: 外文期刊
第一作者: Li, Jieqin
作者: Li, Jieqin;Wang, Yihua;Chai, Juntao;Wang, Chunming;Long, Wuhua;Wang, Di;Wang, Yunlong;Zheng, Ming;Peng, Cheng;Niu, Mei;Wan, Jianmin;Wan, Jianmin;Li, Jieqin;Wang, Lihua
作者机构:
关键词: Green-revertible chlorina 1;Fine mapping;grc1;Heme oxygenase;Rice
期刊名称:JOURNAL OF PLANT BIOLOGY ( 影响因子:2.434; 五年影响因子:2.455 )
ISSN: 1226-9239
年卷期: 2013 年 56 卷 5 期
页码:
收录情况: SCI
摘要: The nuclear genes involved in chloroplast development and chlorophyll biosynthesis must be investigated to understand their functions in plant growth and development. In this study, we isolated and identified a unique leaf-color mutant of rice with a green-yellow phenotype before the four-leaf stage and named the mutation green-revertible chlorina 1 (grc1). The mutants had significantly lower plant height, number of tillers, and panicle length and headed significantly earlier than the wild type. The levels of chlorophylls, carotenoids, and chlorophyll precursors were also lower. The mutation in grc1 affected chloroplast ultrastructure, particularly thylakoid development. Genetic analysis indicated that the green-yellow phenotype was controlled by a single recessive gene. We mapped the grc1 gene to a 32.4-kb region on the long arm of chromosome 6. Through map-based cloning, we identified a 45-bp insertion in the genomic region of LOC_Os06g40080, which encoded a heme oxygenase. Expression of LOC_Os06g40080 was significantly down-regulated in the grc1 mutant. Subcellular localization showed that this heme oxygenase was localized in the chloroplast. In summary, we isolated and identified the gene for grc1, which plays an important role in chlorophyll biosynthesis and chloroplast development in rice.
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