盐胁迫对旋覆花幼苗生长和生理指标的影响

Influence of Salt Stress on Growth and Physiological Indicators of Inula japonica Seedling

研究盐胁迫对旋覆花(Inula japonica)幼苗生长和生理指标的影响,为以后旋覆花的推广和应用提供理论依据,并为盐碱地区城市的景观建设和生态绿化提供更为优质的植物种类。以旋覆花幼苗作为试验材料,分别用浓度为0.2%、0.4%、0.6%、0.8%、1.0%的Na Cl、Na2SO4对旋覆花的幼苗进行胁迫处理,结果显示:盐处理使旋覆花叶片中蛋白质含量、光合色素含量显著降低,可溶性糖、脯氨酸含量显著升高;较高盐浓度处理POD活性升高,SOD活性降低;盐胁迫下丙二醛含量变化不显著。旋覆花对Na Cl、Na2SO4抗盐阈值分别为0.75%和1.08%,存活阈值分别为0.85%和2.33%。

The aim was to study the effects of salt stress on growth and physiology of Inula japonica, and provide theoretical basis for the promotion and application of Inula japonica, and provide suitable planning materials for saline soil and city landscape construction and ecological green. The seedling of Inula japonica were treated by Na Cl and Na_2SO_4 respectively at the concentration of 0.2%, 0.4%, 0.6%, 0.8%, 1.0%. The results showed that the salt treatment in Inula japonica made the protein content and photosynthetic pigments reduce significantly in leaves, meanwhile the soluble sugar, proline content increased significantly, POD activity increased salinity and SOD activity reduced in higher salt concentration treatment; MDA changes in salt stress is not significant. The salt threshold to NaCl and Na_2SO_4 of Inula japonica is 0.75% and 1.08%, respectively. The survival threshold to NaCl and Na_2SO_4 of Inula japonica is 0.85% and 2.33%, respectively.