Regulatory Role of OsMADS34 in the Determination of Glumes Fate, Grain Yield, and Quality in Rice

文献类型： 外文期刊

第一作者： Ren, Deyong

作者： Ren, Deyong;Rao, Yuchun;Leng, Yujia;Li, Zizhuang;Xu, Qiankun;Wu, Liwen;Qiu, Zhennan;Zeng, Dali;Hu, Jiang;Zhang, Guangheng;Zhu, Li;Gao, Zhenyu;Chen, Guang;Dong, Guojun;Guo, Longbiao;Qian, Qian;Rao, Yuchun;Li, Zizhuang;Xue, Dawei

作者机构：

关键词： spikelet;rudimentary glume;sterile lemma;grain size;OsMADS34;transcriptional repressor;rice (Oryza sativa L.)

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2016 年 7 卷

页码：

收录情况： SCI

摘要： Grasses produce seeds on spikelets, a unique type of inflorescence. Despite the importance of grass crops for food, the genetic mechanisms that control spikelet development remain poorly understood. In this study, we used m34-z, a new mutant allele of the rice (Oryza sativa) E-class gene OsMADS34, to examine OsMADS34 function in determining the identities of glumes (rudimentary glume and sterile lemma) and grain size. In the m34-z mutant, both the rudimentary glume and sterile lemma were homeotically converted to the lemma-like organ and acquired the lemma identity, suggesting that OsMADS34 plays important roles in the development of glumes. In the m34-z mutant, most of the grains from the secondary panicle branches (spb) were decreased in size, compared with grains from wild-type, but no differences were observed in the grains from the primary panicle branches. The amylose content and gel consistency, and a seed-setting rate from the spb were reduced in the m34-z mutant. Interesting, transcriptional activity analysis revealed that OsMADS34 protein was a transcription repressor and it may influence grain yield by suppressing the expressions of BG1, GW8, GW2, and GL7 in the rn34-z mutant. These findings revealed that OsMADS34 largely affects grain yield by affecting the size of grains from the secondary branches.

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