Night warming increases wheat yield by improving pre-anthesis plant growth and post-anthesis grain starch biosynthesis  

作　　者：Yonghui Fan Boya Qin Jinhao Yang Liangliang Ma Guoji Cui Wei He Yu Tang Wenjing Zhang Shangyu Ma Chuanxi Ma Zhenglai Huang 

机构地区：[1]College of Agronomy,Anhui Agricultural University/Key Laboratory of Wheat Biology and Genetic Improvement in South Yellow&Huai River Valley,Ministry of Agriculture and Rural Affairs,Hefei 230036,China [2]Xianyang Central Station for Agricultural Technology Extension,Xianyang 712000,China

出　　处：《Journal of Integrative Agriculture》2024年第2期536-550,共15页农业科学学报（英文版）

基　　金：This work was supported by the Project of Natural Science Foundation of Anhui Province,China(2008085qc118);the National Natural Science Foundation of China(U19A2021);the Major Science and Technology Special Project of Anhui Province,China(S202003a06020035);the Jiangsu Collaborative Innovation Center for Modern Crop Production,China(JCIC-MCP).

摘　　要：Global climate change is characterized by asymmetric warming,i.e.,greater temperature increases in winter,spring,and nighttime than in summer,autumn,and daytime.Field experiments were conducted using four wheat cultivars,namely‘Yangmai 18’(YM18),‘Sumai 188’(SM188),‘Yannong 19’(YN19),and‘Annong 0711’(AN0711),in the two growing seasons of 2019-2020 and 2020-2021,with passive night warming during different periods in the early growth stage.The treatments were night warming during the tillering-jointing(NW_(T-J)),jointing-booting(NWJ-B),and booting-anthesis(NWB-A)stages,with ambient temperature(NN)as the control.The effects of night warming during different stages on wheat yield formation were investigated by determining the characteristics of dry matter accumulation and translocation,as well as sucrose and starch accumulation in wheat grains.The wheat yields of all four cultivars were significantly higher in NW_(T-J)than in NN in the 2-year experiment.The yield increases of semi-winter cultivars YN19 and AN0711 were greater than those of spring cultivars YM18 and SM188.Treatment NW_(T-J)increased wheat yield mainly by increasing the 1,000-grain weight and the number of fertile spikelets,and it increased dry matter accumulation in various organs of wheat at the anthesis and maturity stages by increasing the growth rate at the vegetative growth stage.The flag leaf and spike showed the largest increases in dry matter accumulation.NW_(T-J)also increased the grain sucrose and starch contents in the early and middle grain-filling stages,promoting yield formation.Overall,night warming between the tillering and jointing stages increased the pre-anthesis growth rate,and thus,wheat dry matter production,which contributed to an increase in wheat yield.

关 键 词：wheat asymmetric warming dry matter accumulation and translocation STARCH yield 

分 类 号：S512.1[农业科学—作物学]