The nodulation and nyctinastic leaf movement is orchestrated by clock gene LHY in Medicago truncatula  

作　　者：Yiming Kong Lu Han Xiu Liu Hongfeng Wang Lizhu Wen Xiaolin Yu Xiaodong Xu Fanjiang Kong Chunxiang Fu Kirankumar S.Mysore Jiangqi Wen Chuanen Zhou 

机构地区：[1]The Key Laboratory of Plant Development and Environmental Adaptation Biology,Ministry of Education,School of Life Science,Shandong University,Qingdao 266237,China [2]School of Life Sciences,Guangzhou University,Guangzhou 510006,China [3]Key Laboratory of Plant Stress Biology,School of Life Sciences,Henan University,Kaifeng 475001,China [4]Shandong Provincial Key Laboratory of Energy Genetics,Key Laboratory of Biofuels,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China [5]Noble Research Institute,LLC,Ardmore,Oklahoma,USA

出　　处：《Journal of Integrative Plant Biology》2020年第12期1880-1894,共15页植物学报（英文版）

基　　金：This workwas supported by grants from Ministry of Science and Technology of China(2016YFDO100500 and 2015CB943500);the National Natural Science Founda-tion of China(31671507 and U1906201);Shandong Province(ZR2018ZC0334 and ZR2019MC013),Project for innovation and entrepreneurship leader of Qingdao(19-3-2-3-zhc);Development of M.truncatula Tnt1 mutant population was,in part,funded by the National Science Foundation,USA(DB1-0703285 and 1OS-1127155).

摘　　要：As sessile organisms,plants perceive,respond,and adapt to the environmental changes for optimal growth and survival.The plant growth and fitness are enhanced by circadian clocks through coordination of numerous biological events.In legume species,nitrogen-fixing root nodules were developed as the plant organs specialized for symbiotic transfer of ni-trogen between microsymbiont and host.Here,we report that the endogenous circadian rhythm in nodules is regulated by MtLHY in legume species Medicago truncatula.Loss of function of MtLHY leads to a reduction in the number of nodules formed,resulting in a diminished ability to assimilate nitrogen.The operation of the 24-h rhythm in shoot is further influenced by the availability of nitrogen produced by the nodules,leading to the irregulated nyctinastic leaf movement and reduced biomass in mtlhy mutants.These data shed new light on the roles of MtLHY in the orchestration of circadian oscillator in nodules and shoots,which provides a mechanistic link between nodulation,nitrogen assimilation,and clock function.

关 键 词：NODULATION MOVEMENT NODULES 

分 类 号：S541[农业科学—作物学]