低温胁迫对4个草莓品种生理指标的影响  

Effect of Low Temperature Stress on Physiological Index of Four Strawberry Varieties

作　　者：程嘉惠 张梅丽 王超[2,3] 闫绍鹏[1] CHENG Jiahui;ZHANG Meili;WANG Chao;YAN Shaopeng(College of Life Science,Northeast Forestry University,Harbin 150040;Tibet Agricultural and Animal Husband-ry University,Linzhi 860000;Jilin Academy of Agricultural Sciences,Changchun 130033,China)

机构地区：[1]东北林业大学生命科学学院,哈尔滨150040 [2]西藏农牧学院,西藏林芝860000 [3]吉林省农业科学院,长春130033

出　　处：《东北农业科学》2021年第1期85-88,113,共5页Journal of Northeast Agricultural Sciences

基　　金：东北林业大学大学生创新训练项目(201810225136);国家自然科学基金项目(31760548)。

摘　　要：为探讨不同草莓品种在低温胁迫下的生理变化规律和抗寒能力,2018年以4个草莓品种为实验材料,测定了低温胁迫下叶片相对电导率(REC)、可溶性蛋白(WSP)含量、脯氨酸(Pro)含量、丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性等生理指标。结果表明,随着胁迫温度下降,草莓叶片相对电导率上升、保护性物质可溶性蛋白、丙二醛、脯氨酸等含量升高;保护性酶SOD活性降低。根据相对电导率计算半致死温度,不同草莓品种抗寒性能排序为:赛娃>四公主>宁玉>粉佳人。叶片在低温胁迫过程中细胞膜质过氧化加剧,丙二醛累积,电解质外渗,脯氨酸、可溶性蛋白等渗透调节物质在胁迫的不同阶段起到不同程度的保护作用。The physiological changes and cold resistance of different strawberry varieties under low temperature stress were investigated.In 2018,four strawberry varieties were used as experimental materials to determine the REC,WSP content,Pro content,MDA content and SOD activity under low temperature stress.The results showed that with the decrease of stress temperature,the REC of strawberry leaves,the content of WSP,MDA and Pro content all increased,while SOD decreased.According to the semi-lethal temperature,the cold resistance performance of different strawberry varieties was ranked as:Saiwa>Sigongzhu>Ningyu>Fenjiaren.In the process of low temperature stress,cell membrane peroxidation intensified,MDA accumulates,electrolyte extravasates,Pro,WSP and other osmotic adjustment substances played different degrees of protection in different stages of stress.

关 键 词：草莓 低温胁迫 生理指标 抗寒性 

分 类 号：S668.4[农业科学—果树学]