Abstract: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.