不同品种红三叶苗期对4℃低温胁迫的生理响应  

Physiological Response of Different Red Clover Varieties to 4℃ Chilling Stress at Seedling Stage

作　　者：孔令慧[1] 赵桂琴[1] 

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《中国草地学报》2013年第3期31-37,共7页Chinese Journal of Grassland

基　　金：甘肃省财政厅项目(2012041020);农业部牧草种质资源保护项目(20110807)资助

摘　　要：采用盆栽法对4个红三叶品种进行了苗期4℃低温胁迫处理,分析了红三叶对低温胁迫的生理响应及不同品种的抗寒性差异。结果表明:随着胁迫时间的延长,红三叶叶片含水量、叶绿素含量与对照相比呈逐渐下降趋势,而叶片膜相对透性、丙二醛含量、游离脯氨酸含量、过氧化物歧化酶活性、过氧化物酶活性、过氧化氢酶活性均呈上升趋势,且品种间差异显著。采用8个生理指标对红三叶不同品种的抗寒性进行综合评价,结果表明抗寒性为R-1>瑞德>多丽>岷山。Four red clover varieties were stressed by 4℃ low temperature with pot try to analyze their physiological response to chilling stress and difference in cold-resistance at seedling stage. The results showed that with the prolonging chilling stress, leaf water content and chlorophyll content decreased grad- ually compared with the control, while leaf relative membrane permeability, MDA, Pro content, SOD, POD and CAT activity increased remarkably and there were significant difference among cultivars. Eight physiological indexes were used to comprehensively evaluate cold resistant difference of four varieties, which indicated that cold resistance of R-1 was the strongest, followed by Rider, Dorry and Minshan.

关 键 词：红三叶 低温胁迫 生理响应 抗寒性 综合评价 

分 类 号：Q945.78[生物学—植物学]