Characterization and fine mapping of an early senescence mutant (es-t) in Oryza sativa L.

文献类型： 外文期刊

第一作者： Yang YaoLong

作者： Yang YaoLong;Rao YuChun;Liu HuiJuan;Fang YunXia;Dong GuoJun;Huang LiChao;Leng YuJia;Guo LongBiao;Zhang GuangHeng;Hu Jiang;Gao ZhenYu;Qian Qian;Zeng DaLi;Liu HuiJuan

作者机构：

关键词： Oryza sativa;morphological and physiological analysis;genetic mechanism;map-based cloning

期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）

ISSN： 1001-6538

年卷期： 2011 年 56 卷 23 期

页码：

收录情况： SCI

摘要： An es-t (early senescence-temporary) mutant, produced by ethylene methylsulfonate treatment of strain Nipponbare, was identified in rice. The leaves of es-t appeared yellow at the seedling stage, and had decreased chlorophyll content. Rust spots were found during growth in es-t, especially at the leaf margin and tip. The plants showed a typical early-senescence phenotype at the milky stage. The leaf surface of es-t appeared smoother than wild-type leaves under a scanning electron microscope, because the leaves lack siliceous protuberances around the stoma. Chloroplasts grow abnormally and are filled with many starch grains in es-t. Paraffin section analysis showed that the development of the sclerenchyma cells and vascular bundles were also abnormal in es-t. Genetic analysis indicated that es-t was controlled by a recessive gene, which was finely mapped to a 42-kb interval on chromosome 5. These results will facilitate the positional cloning and functional studies of the gene.

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