关键词: 臭椿, 半同胞家系, 耐盐性, 隶属函数, 生理生化指标

Abstract: [Objective] The purpose of this study was to provide a reference for the development and utilization of saline-alkali land by comparing the salt tolerance of 3 half-sib families of Ailanthus. [Method] The growth and physiological characteristics of three half-sib A. altissima under different salt stress were studied in order to clarify the effect of salt stress and the different salt tolerance ability among these three A. altissima. [Results] Seedling height and biomass were reduced by salt stress. The inhibition effect of growth increased with increasing salt concentration. The contents of relative con-ductivity, manlon-dialdehyde(MDA), free proline and soluble sugar of leaves were stimulated under salt stress but soluble protein content was reduced. In addition, the peroxidase and superoxide dismu-tase activities were also increased. [Conclusion] With membership function method, the order of salt tolerance ability of these three A. altissima was Tianchang Anhui > Lincheng Hebei > Shanshan Xinjiang.

Key words: Ailanthus altissima, half-sib families, salt tolerance, membership function, physiological and biochemical indexes