Physiological Analysis of Drought Resistance of Seven Cultivars Spring Wheat in Northern Regions of China  

作　　者：Gao Fengmei Zhang Fuzhi Zhao Yuanling Li Tie Li Dongmei Sun Minglong Zhang Qichang Liu Ningtao Sun Dan Tian Chao Sun Lianfa 

机构地区：[1]Institute of Crop Resources,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China [2]College of Art and Design,Harbin Institute of Information Engineering,Harbin 150431,China

出　　处：《Journal of Northeast Agricultural University(English Edition)》2024年第2期1-12,共12页东北农业大学学报（英文版）

基　　金：the National Ministry of Science and Technology Key Project(2018YFE0123300);the National Modern Agricultural Wheat Industry Technology System Keshan Comprehensive Test Station(CARS‒03‒54);the Collaborative Innovation and Extension System of Modern Agricultural Wheat in Heilongjiang Province。

摘　　要：In order to determine the physiological mechanism of drought resistance of northern wheat in China,six drought resistant wheat and one sensitivity to drought wheat were planted in pots.They were subjected to drought treatment and normal water when the plants grew to the 3-leaf stage.Samples were collected at 10,20,30,and 40 days after the drought treatment,respectively.The electrical conductivity,photosynthetic parameters,chlorophyll fluorescence parameters,sugar content,proline content,protein content,and active oxygen scavenging enzyme activity of the plants were detected,and the agronomic traits of the wheat varieties were investigated at maturity.The results indicated that the phenotype and yield-related factors of Darkhan 144 changed little under the drought stress.The relative electrical conductivity of Kefeng 6 and Darkhan 166 was lower under the drought stress,and their cell membrane was less damaged.The Darkhan 144 and Darkhan 166 had higher drought resistance coefficients,and were the wheat varieties with stronger drought resistance.However,the physiological mechanisms of drought resistance of these three wheat were different:Darkhan 144 maintained a higher photosynthetic activity under the drought stress;Darkhan 166 maintained a higher protein content,photosynthetic activity and active oxygen scavenging enzyme activity.In addition,other drought-resistant varieties Kefeng 6,Kefeng 10 and Longmai 26 had a higher content of osmoregulatory substances under the drought stress.

关 键 词：WHEAT tolerance drought physiological mechanism 

分 类 号：S512.1[农业科学—作物学]