盐胁迫对黄瓜不同耐盐品种膜脂过氧化及脯氨酸含量的影响

 用浓度为225mmol·L-1的NaCl溶液对黄瓜不同耐盐品种进行处理,研究NaCl胁迫对黄瓜不同耐盐品种叶片膜脂过氧化及脯氨酸含量的影响。结果初步表明,在一定盐浓度下,随着处理天数的延长,耐盐品种和盐敏感品种的膜脂过氧化明显加剧,丙二醛含量和质膜透性明显升高并且差异显著,变化趋势稳定;而脯氨酸含量呈波动式变化,且变化趋势不稳定。因此,丙二醛含量和质膜透性可作为鉴定本试验黄瓜品种耐盐性的生理指标,脯氨酸含量则不宜作为鉴定本试验黄瓜品种耐盐性的生理指标。

Effects of Salt Stress on Membrane Lipjd Peroxidation and Proline Content in Cucumber Cultivars

Effect of salt stress on membrane lipid peroxidation,proline content in cucumber cultivars was carried out at NaCl concentration of 225 mmol·L-1.The results showed that under salt stress,with treatment days prolongation,membrane lipid peroxidation of different cucumber cultivars increased gradually,malonyldialdehyde(MDA)content and membrane permeability increased obviously and difference among cucumber cultivars was significant,the change trend was stable;while the change of proline content showed fluctuati...