Mitigating growth-stress tradeoffs via elevated TOR signaling in rice  

作　　者：Wei Li Jiaqi Liu Zeqi Li Ruiqiang Ye Wenzhen Chen Yuqing Huang Yue Yuan Yi Zhang Huayi Hu Peng Zheng Zhongming Fang Zeng Tao Shiyong Song Ronghui Pan Jian Zhang Jumim Tu Jen Sheen Hao Du 

机构地区：[1]State Key Laboratory of Rice Biology,College of Agriculture and Biotechnology,Zhejiang University,Yu-Hang-Tang Road No.866,Hangzhou 310058,China [2]ZJU-Hangzhou Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou 311215,China [3]Hainan Institute of Zhejiang University,Sanya 572025,China [4]National Key Laboratory of Plant Molecular Genetics,CAS,Center for Excellence in Molecular Plant Sciences,Shanghai lnstitute of Plant Physiology and Ecology,ChineseAcademy of Sciences,Shanghai 200032,China [5]Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education),College of Agricultural Sciences,GuizhouUniversity,Guiyang 550025,China [6]State Key Laboratory of Rice Biology and Breeding,China National Rice Research Institute,Hangzhou 311400,China [7]Department of Molecular Biology and Center for Computational and Integrative Biology,Massachusetts General Hospital,and Department of Genetics,Harvard Medical School,Boston,MA02114,USA

出　　处：《Molecular Plant》2024年第2期240-257,共18页分子植物（英文版）

基　　金：Thise research was supported by the Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City City(320LH031 and HSPHDSRF-2023-04-016);Zhejiang Provincial Natural Science Foundation of China(LY21C020003);Zhejiang University Global Partnership Fund,Fundamental Research Funds for the Central Universities for the Central Universities(K20200168);the Key Research and Development Program of Zhejiang(2020C02002);National Natural Science Foundation of China(32201819);China Postdoctoral Science Foundation(2022M712807).

摘　　要：Rice production accounts for approximately half of the freshwater resources utilized in agriculture,result-ing in greenhouse gas emissions such as methane(CH4)from flooded paddy fields.To address this chal-lenge,environmentally friendly and cost-effective water-saving techniques have become widely adopted in rice cultivation.However,the implementation of water-saving treatments(WsTs)in paddy-field rice has been associated with a substantial yield loss of up to 50%as well as a reduction in nitrogen use efficiency(NUE).In this study,we discovered that the target of rapamycin(TOR)signaling pathway is compromised in rice under WsT.Polysome profiling-coupled transcriptome sequencing(polysome-seq)analysis unveiled a substantial reduction in global translation in response to WST associated with the downregulation of TOR activity.Molecular,biochemical,and genetic analyses revealed new insights into the impact of the positive TOR-S6K-RPS6 and negative TOR-MAF1 modules on translation repression under WST.Intriguingly,ammonium exhibited a greater ability to alleviate growth constraints under WsT by enhancing TOR signaling,which simultaneously promoted uptake and utilization of ammonium and nitrogen allocation.We further demonstrated that TOR modulates the ammonium transporter AMT1;1 as well as the amino acid permease APP1 and dipeptide transporter NPF7.3 at the translational level through the 5'untranslated region.Collectively,these findings reveal that enhancing TOR signaling could mitigate rice yield penalty due to WST by regulating the processes involved in protein synthesis and NUE.Our study will contribute to the breeding of new rice varieties with increased water and fertilizer utilization efficiency.

关 键 词：target of rapamycin TOR water-saving rice low-carbon agriculture DROUGHT nitrogen use efficiency NUE 

分 类 号：S511[农业科学—作物学]