Photosynthesis regulates tillering bud elongation and nitrogen-use efficiency via sugar-induced NGR5 in rice

文献类型： 外文期刊

第一作者： Wen, Rui

作者： Wen, Rui;Zhu, Maodi;Yu, Junming;Wei, Xiangjin;Jiao, Guiai;Hu, Shikai;Sheng, Zhonghua;Zhao, Fengli;Tang, Shaoqing;Shao, Gaoneng;Hu, Peisong;Kou, Liquan;Yu, Hong;Kou, Liquan;Yu, Hong;Ahmad, Shakeel

作者机构：

关键词： DTN1; light; NGR5; rice; sucrose; tiller number

期刊名称：NEW PHYTOLOGIST （ 影响因子：8.3； 五年影响因子：10.2 ）

ISSN： 0028-646X

年卷期： 2024 年 243 卷 4 期

页码：

收录情况： SCI

摘要： center dot Rice tillering is one of the most important agronomical traits largely determining grain yield. Photosynthesis and nitrogen availability are two important factors affecting rice tiller bud elongation; however, underlying mechanism and their cross-talk is poorly understood. center dot Here, we used map-based cloning, transcriptome profiling, phenotypic analysis, and molecular genetics to understand the roles of the Decreased Tiller Number 1 (DTN1) gene that encodes the fructose-1,6-bisphosphate aldolase and involves in photosynthesis required for light-induced axillary bud elongation in rice. center dot Deficiency of DTN1 results in the reduced photosynthetic rate and decreased contents of sucrose and other sugars in both leaves and axillary buds, and the reduced tiller number in dtn1 mutant could be partially rescued by exogenous sucrose treatment. Furthermore, we found that the expression of nitrogen-mediated tiller growth response 5 (NGR5) was remarkably decreased in shoot base of dtn1-2, which can be activated by sucrose treatment. Overexpression of NGR5 in the dtn1-2 could partially rescue the reduced tiller number, and the tiller number of dtn1-2 was insensitive to nitrogen supply. center dot This work demonstrated that the sugar level regulated by photosynthesis and DTN1 could positively regulate NGR5 expression, which coordinates the cross-talk between carbon and nitrate to control tiller bud outgrowth in rice.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序