豆科牧草种子萌发特性与其抗旱性差异的研究  

Seed Germination Characteristics and Drought Resistance of Legumes

作　　者：郭彦军[1] 倪郁[2] 吕俊[2] 张家骅[1] 

机构地区：[1]西南农业大学动物科技学院,重庆400716 [2]西南农业大学农学系,重庆400716

出　　处：《中国草地》2003年第3期24-27,共4页Grassland of China

基　　金：国家"十五"重大专项"三峡库区生态环境安全及生态经济系统重建关键技术研发与示范"项目(2001BA604A03)

摘　　要：试验采用PEG模拟干旱测定了3种豆科牧草(5个品种)种子的相对发芽率和胚根/胚芽比值,并在温室条件下采用盆栽控水研究了这3种牧草在水分胁迫下叶片相对含水量和质膜透性的变化规律。结果显示:种子萌发期抗旱性强的牧草其分枝期抗旱性亦强,抗旱能力依次为游客>德福>百脉根>胡亚>瑞文德。试验证明,利用生理生化方法和种子萌发实验进行牧草品种间抗旱性鉴定是可行的。A study was carried out to determine the relative seed germination rate and the ratio of embryonic root and embryonic bud of 5 legumes(5 varieties) with different concentration of polyethylene glycol(PEG).And the changes of relative water content,relative cell membrane permeability in these varieties under drought stress,were also determined in green house.The results showed that high drought resistance in seed germination was much consistent with the resistance of the plant in the stage of branch.The drought resistance order of these varieties was:Eureka>Defi>Lotus corniculatus>Huia>Revendel.It was suggested that physiological_Biochemical methods and seed germination rate were feasible in identifying drought resistance of forage varieties.

关 键 词：豆科牧草 种子 萌发特性 抗旱性 发芽串 生理生化指标 

分 类 号：S541[农业科学—作物学]