NaHCO3胁迫下朝鲜接骨木膜脂过氧化和渗透调节物质含量的变化

采用盆栽试验的方法研究NaHCO₃不同浓度和不同胁迫时间对朝鲜接骨木（Sambucus coreana(Nakai)Kom.et Alis.）叶片的膜脂过氧化和渗透调节物质含量的影响。研究表明，随盐浓度的增加和胁迫时间的延长，MDA含量和相对电导率明显升高，可溶性蛋白含量整体均呈上升趋势；随盐浓度的增加，脯氨酸含量上升趋势明显，可溶性糖含量也呈上升趋势。研究结果显示，朝鲜接骨木在低浓度（1 g·kg^-1）盐胁迫下相关生理指标相对稳定，且随胁迫时间延长变化相对较小，可在轻度盐碱化地区应用。

Plasma-membrane Peroxidation and Osmotic Substances Changes of Sambucus coreana Seedlings Under NaHCO3 Stress

The effects of different concentrations of NaHCO₃ and different stress time on plasma-membrane peroxide-tion and contents of osmoregulation substances of Sambucus coreana(Nakai)Kom.et Alis. leaves were studied using plotted experimentation. Dramatic increasing of malondialdehyde contents and relative electrical conductivity was detected with the increasing of NaHCO₃ concentration and treatment time, as well as the soluble protein contents; Marked increasing of proline and soluble sugar contents was detected with the increasing of NaHCO₃ concentration. Results suggested that there were relative jarless physiological responses of S. coreana(Nakai)Kom.et Alis. under lower NaHCO₃ concentration (1 g·kg^-1), as well as relative slight changing with increasing treatment time, so it could be planted in mild saline-alkali area.