Variation in NRT1.1B contributes to nitrate-use divergence between rice subspecies

文献类型： 外文期刊

第一作者： Hu, Bin

作者： Hu, Bin;Wang, Wei;Ou, Shujun;Tang, Jiuyou;Li, Hua;Che, Ronghui;Zhang, Zhihua;Wang, Hongru;Wang, Yiqin;Liang, Chengzhen;Xu, Chi;Liang, Yan;Chu, Chengcai;Wang, Wei;Li, Hua;Zhang, Zhihua;Wang, Hongru;Liang, Yan;Ou, Shujun;Chai, Xuyang;Liu, Linchuan;Piao, Zhongze;Deng, Qiyun;Deng, Qiyun;Deng, Kun;Zhang, Lianhe

作者机构：

期刊名称：NATURE GENETICS （ 影响因子：38.33； 五年影响因子：36.431 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Asian cultivated rice (Oryza sativa L.) consists of two main subspecies, indica and japonica. Indica has higher nitrate-absorption activity than japonica, but the molecular mechanisms underlying that activity remain elusive. Here we show that variation in a nitrate-transporter gene, NRT1.1B (OsNPF6.5), may contribute to this divergence in nitrate use. Phylogenetic analysis revealed that NRT1.1B diverges between indica and japonica. NRT1.1B-indica variation was associated with enhanced nitrate uptake and root-to-shoot transport and upregulated expression of nitrate-responsive genes. The selection signature of NRT1.1B-indica suggests that nitrate-use divergence occurred during rice domestication. Notably, field tests with near-isogenic and transgenic lines confirmed that the japonica variety carrying the NRT1.1B-indica allele had significantly improved grain yield and nitrogen-use efficiency (NUE) compared to the variety without that allele. Our results show that variation in NRT1.1B largely explains nitrate-use divergence between indica and japonica and that NRT1.1Bindica can potentially improve the NUE of japonica.

分类号： R394

  • 相关文献
作者其他论文 更多>>

微信小程序