【摘要】 以大豆为材料,利用不同浓度的脱落酸（ABA）和水杨酸（SA）浸种处理及幼苗根灌处理,测定分析处理后大豆幼苗生长状况及各项生理生化指标数值变化,以探讨脱落酸和水杨酸对大豆抗冷性的影响.结果表明:各浓度ABA和SA处理对大豆幼苗的株高、单株干重均无显著影响,促进根的生长比较明显;经过ABA和SA处理的大豆幼苗超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性均高于对照.当ABA浓度为0.15mg.L^-1和SA浓度为100mg.L^-1时,大豆幼苗SOD、POD和CAT活性达到最高值.经过ABA和SA处理的大豆幼苗脯氨酸（Pro）含量均高于对照,丙二醛（MDA）含量均低于对照,当ABA浓度为0.15mg.L^-1和SA浓度为100mg.L^-1时,处理的大豆幼苗Pro含量最高,MDA含量最低;两种处理方式比较,根灌处理的效果比较明显.更多还原

【Abstract】 Soybeans were taken as experimental materials to study the inducing effects of abscisic acid( ABA) and salicylic acid( SA) on the cold resistance of plants. ABA and SA of different concentrations were used to soak seeds of soybeans and to irrigate the roots of soybean seedlings,and the growth condition and other physiological and biochemical indices of soybean seedlings were measured and analyzed. The results showed that root irrigation treatment was comparatively better than seed soaking treatment.更多还原