Modulating plant growth-metabolism coordination for sustainable agriculture

文献类型： 外文期刊

第一作者： Li, Shan

作者： Li, Shan;Tian, Yonghang;Wu, Kun;Ye, Yafeng;Yu, Jianping;Zhang, Jianqing;Liu, Qian;Tong, Yiping;Fu, Xiangdong;Li, Shan;Fu, Xiangdong;Hu, Mengyun;Li, Hui;Harberd, Nicholas P.

作者机构：

期刊名称：NATURE （ 影响因子：49.962； 五年影响因子：54.637 ）

ISSN： 0028-0836

年卷期： 2018 年 560 卷 7720 期

页码：

收录情况： SCI

摘要： Enhancing global food security by increasing the productivity of green revolution varieties of cereals risks increasing the collateral environmental damage produced by inorganic nitrogen fertilizers. Improvements in the efficiency of nitrogen use of crops are therefore essential; however, they require an in-depth understanding of the co-regulatory mechanisms that integrate growth, nitrogen assimilation and carbon fixation. Here we show that the balanced opposing activities and physical interactions of the rice GROWTH-REGULATING FACTOR 4 (GRF4) transcription factor and the growth inhibitor DELLA confer homeostatic co-regulation of growth and the metabolism of carbon and nitrogen. GRF4 promotes and integrates nitrogen assimilation, carbon fixation and growth, whereas DELLA inhibits these processes. As a consequence, the accumulation of DELLA that is characteristic of green revolution varieties confers not only yield-enhancing dwarfism, but also reduces the efficiency of nitrogen use. However, the nitrogen-use efficiency of green revolution varieties and grain yield are increased by tipping the GRF4-DELLA balance towards increased GRF4 abundance. Modulation of plant growth and metabolic co-regulation thus enables novel breeding strategies for future sustainable food security and a new green revolution.

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