数字农科院2.0

ABNORMAL FLOWER AND GRAIN 1 encodes OsMADS6 and determines palea identity and affects rice grain yield and quality

文献类型： 外文期刊

作者： Xiaoqi Yu ; Saisai Xia +; Qiankun Xu ; Yuanjiang Cui ; Ming Gong ; Dali Zeng ; Qiang Zhang ; Lan Shen ; Guiai Jiao ; Zhenyu Gao ; Jiang Hu ; Guangheng Zhang ; Li Zhu ; Longbiao Guo ; Deyong Ren *; Qian Qian *

作者机构：

关键词： Rice (Oryza Sativa); Afg1; Palea; Transcriptional Activator; Grain Yield And Quality

期刊名称： Science China-Life Sciences

ISSN： 1674-7305

年卷期： 2020 年 63 卷 2 期

页码：

收录情况： JCR（2021版） ; CSCD（2020-2021年度）

摘要： The palea and lemma are floral organ structures unique to grasses; these structures form the hull and directly affect grain size and quality. However, the molecular mechanisms controlling the development of the hull are not well understood. In this study, we characterized the rice (Oryza sativa) abnormal flower and grain1 (afg1) mutant, a new allele of OsMADS6. Similar to previously characterized osmads6 alleles, in the afg1 floret, the palea lost its marginal region and acquired the lemma identity. However, in contrast to other osmads6 alleles, the afg1 mutant showed altered grain size and grain quality, with decreased total starch and amylose contents, and increased protein and soluble sugar contents. The analysis of transcriptional activity suggested that AFG1 is a transcriptional activator and may affect grain size by regulating the expression levels of several genes related to cell expansion and proliferation in the afg1 mutant. These results revealed that AFG1 plays an important role in determining palea identity and affecting grain yield and quality in rice.

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