山梨醇浸种对盐胁迫下无花果发芽及幼苗生长的影响

摘要

以布兰瑞克无花果种子为试材，经过200μg/mL山梨醇浸种预处理，置于不同盐分梯度下进行种子萌发试验，并测定幼苗生长、抗氧化酶活性、可溶性糖、脯氨酸及MDA、H2O2含量，以阐明盐胁迫下山梨醇处理对无花果种子萌发和幼苗生理特性的影响。结果表明，山梨醇浸种及0.05%NaCl盐胁迫能够促进无花果种子萌发，使幼苗生长健壮；山梨醇处理能够有效提高无花果幼苗叶片SOD、CAT的活性，促进可溶性糖和脯氨酸积累，增强无花果幼苗渗透调节，减少MDA和H2O2的积累，提高幼苗的耐盐性。%The seedling growrh, call protective enzyme activities, soluble sugar, protein, MDA and H2O2 content of Brunswick figs treated with sorbitol under different salinity gradient (0, 0.05%, 0.15%, 0.25%) were stydied in order to clarify the effects of sorbitol treatment on seed germination and seedling physiological and biochemical characteristics. The results showed that:sorbitol and 0.05%NaCl salinity stress can increase seed germination and the seedling growrh;sorbitol can increase the SOD, CAT activities, the content of soluble sugar and protein, decrease the content of MDA and H2O2, improve the salt tolerance of Brunswick figs.