Identification and characterization of NARROW AND ROLLED LEAF 1, a novel gene regulating leaf morphology and plant architecture in rice

文献类型： 外文期刊

第一作者： Hu, Jiang

作者： Hu, Jiang;Zhu, Li;Zeng, Dali;Gao, Zhenyu;Guo, Longbiao;Fang, Yunxia;Zhang, Guangheng;Dong, Guojun;Yan, Meixian;Liu, Jian;Qian, Qian

作者机构：

关键词： CslD4;Map-based cloning;NARROW AND ROLLED LEAF 1;Rice (Oryza sativa L.)

期刊名称：PLANT MOLECULAR BIOLOGY （ 影响因子：4.076； 五年影响因子：4.89 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Leaf morphology is an important agronomic trait in rice breeding. We isolated three allelic mutants of NARROW AND ROLLED LEAF1 (nrl1) which showed phenotypes of reduced leaf width and semi-rolled leaves and different degrees of dwarfism. Microscopic analysis indicated that the nrl1-1 mutant had fewer longitudinal veins and smaller adaxial bulliform cells compared with the wild-type. The NRL1 gene was mapped to the chromosome 12 and encodes the cellulose synthase-like protein D4 (OsCslD4). Sequence analyses revealed single base substitutions in the three allelic mutants. Genetic complementation and over-expression of the OsCslD4 gene confirmed the identity of NRL1. The gene was expressed in all tested organs of rice at the heading stage and expression level was higher in vigorously growing organs, such as roots, sheaths and panicles than in elsewhere. In the mutant leaves, however, the expression level was lower than that in the wild-type. We conclude that OsCslD4 encoded by NRL1 plays a critical role in leaf morphogenesis and vegetative development in rice.

分类号： Q946

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