外源GA_3对盐胁迫下草莓试管苗生长的影响

Effectsof Exogenous GA_3 on Growth of Strawberry Plantlets in Salt Stress

研究了外源GA3对盐胁迫下草莓试管苗生理生化指标的影响。结果表明:试管苗生长15 d后,处理MS+0.3%NaCl+0.5mg.L-1GA3和处理MS+0.3%NaCl相比,试管苗体内叶绿素、脯氨酸、可溶性蛋白含量均增加,丙二醛含量降低,保护酶SOD、POD和CAT活性增强,试管苗生长趋于正常。

The effect of mitigative exogenous GA3 on growth of strawberry plantlets under certain salt stress in vitro by comparing some physiological indexes was studied. The results were as follows., after 15 days in vitro culture,compared with those which grew under salt stress, the treatment with 0.5 mg·L^-1 GA3 which strawberry plantlets were inoculated in medium with 0.3 percent NaC1 could relatively increase the contents of chlorophyll, praline and soluble protein. The accumulation of malondialdehy （MDA） was comparatively delayed,and the activity of membrane protective enzymes such as superoxide dismutase （SOD）,peroxidase （POD） and catalase （CAT） were relatively promoted.