A novel gene IBF1 is required for the inhibition of brown pigment deposition in rice hull furrows

文献类型： 外文期刊

第一作者： Shao, Tian

作者： Shao, Tian;Tang, Ding;Li, Ming;Cheng, Zhukuan;Qian, Qian;Chen, Jun;Luo, Qiong;Shao, Tian;Tang, Ding;Li, Ming;Cheng, Zhukuan

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2012 年 125 卷 2 期

页码：

收录情况： SCI

摘要： The role of flavonoids as the major red, blue, purple and brown pigments in plants has gained these secondary products a great deal of attention over the years. In this study, we characterized a rice inhibitor for brown furrows1 (ibf1) mutant. In the ibf1 mutant, brown pigments specifically accumulate in hull furrows during seed maturation and reach a maximum level in dry seeds. Higher amounts of total flavonoids and anthocyanin in hull may be responsible for the brown pigmentation of ibf1. The IBF1 gene, which encodes a similar kelch repeat-containing F-box protein, was isolated by map-based cloning approach. Real-time RT-PCR and GUS activity assays revealed that IBF1 specifically expressed in reproductive tissues. GFP-IBF1 fusion protein mainly localized in cytoplasm. The expression of some major structural enzymatic genes involved in flavonoids biosynthesis could be up- or down-regulated to some different extent in ibf1 mutant. Our data suggested that IBF1 as a suppressor could inhibit the brown pigmentation of rice hull furrows.

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