盐胁迫对航天诱变向日葵生理生化指标的影响

摘要

[Objective] To study the changes of physiological and biochemical indices of sunflower induced by space flight under salt stress.[Method] Taking sunflower induced by space flight as test materials,they were treated with different concentrations of NaCl (0,0.3％,0.6％,0.9％ and 1.2％).SOD activity,POD activity,MDA content,soluble protein content and proline content were determined.The effects of salt stress on physiological and biochemical indices of sunflower induced by space flight were analyzed.[Result] SOD activity increased with the increase of salt concentration.When salt concentration was 0.6％,SOD activity declined.POD activity increased with the increase of salt concentration.The contents of MDA,soluble protein and proline decreased with the rise of salt concentration.When salt concentration was 0.9％,they increased.[Conclusion] Sunflower induced by space flight can grow normally at salt concentration of 0.9％.These results can provide theoretical support for screening out new sunflower material against salt stress.%[目的]探究盐胁迫下航天诱变向日葵生理生化指标的变化.[方法]选用航天诱变向日葵作为试验材料,用不同浓度(0、0.3％、0.6％、0.9％、1.2％) NaCl进行处理,分别测定其SOD活性、POD活性、MDA含量、可溶性蛋白含量、脯氨酸含量,分析盐胁迫对航天诱变向日葵生理生化指标的影响.[结果]随着盐浓度的增加,SOD活性随之上升,当盐浓度为0.6％时,SOD活性下降;POD活性随盐浓度的升高而上升;MDA、可溶性蛋白、Pro的含量随盐浓度的上升而下降,当盐浓度为0.9％时其含量呈增加趋势.[结论]航天诱变向日葵能在0.9％的盐浓度下正常生长.该研究结果可为筛选抗盐的向日葵新材料提供理论支持.