文献类型： 外文期刊
作者： Li, Shan 1 ; Tian, Yonghang 1 ; Wu, Kun 1 ; Ye, Yafeng 1 ; Yu, Jianping 1 ; Zhang, Jianqing 1 ; Liu, Qian 1 ; Hu, Mengyun 3 ;
作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Cell & Chromosome Engn, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Life Sci, Beijing, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Hebei Lab Crop Genet & Breeding, Shijiazhuang, Hebei, Peoples R China
4.Univ Oxford, Dept Plant Sci, Oxford, England
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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