Multiple Heat and Drought Events Affect Grain Yield and Accumulations of High Molecular Weight Glutenin Subunits and Glutenin Macropolymer in Wheat
Spring wheat plants were subjected to water deficits and / or high temperature episodes at spikelet initiation,anthesis or both stages.The stresses modified the early dough stage and maturity,shortened the kernel desiccation period,and caused loss of grain yield.Plants subjected to stress at the early growth stages had higher grain yields when stressed again at anthesis.Concentrations of high molecular weight glutenin subunits (HMW-GS) in the grain was up-regulated by the single early drought event,the early drought combined with late heat stress and the double drought stresses,but was down-regulated by the early heat and double heat stresses.Concentration ofglutenin macropolymer (GMP) was increased by the single early drought episode,the single late drought and heat events,as well as the early drought combined with the late heat stresses,but was reduced by the early heat and double heat stresses.The results of the effect of various stress combinations are discussed in relation to the changes in concentrations of HMW-GS in grain and the modified growth periods under different stress combinations.
Spring wheat heat and drought acclimation glutenin kernel desiccation
ZHANG Xiaxiang CAI Jian WOLLENWEBER Bernd LIU Fulai DAI Tingbo CAO Weixing JIANG Dong
Key Laboratory of Crop Eco-physiology and Production, Ministry of Agriculture, Nanjing Agricultural Institute of Agroecology, Faculty of Science and Technology, Aarhus University, DK-4200 Slagelse,Den Department of Agriculture and Ecology, Faculty of Science, University of Copenhagen, H(Φ)jbakkegaard
国内会议
北京
英文
66-77
2012-11-01（万方平台首次上网日期，不代表论文的发表时间）