摘要
[目的]探讨牧草耐盐碱机理及筛选耐盐碱品种。[方法]利用不同浓度盐碱处理,研究了盐碱胁迫下细胞膜透性及保护酶活性变化规律。[结果]随着NaHCO3和Na2SO4浓度增加,牧草细胞膜透性与丙二醛含量(MDA)变化密切相关,过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性均呈规律性变化。细胞膜透性的增加是由于膜的过氧化造成的,各种保护酶活性均呈先升后降的趋势,保护酶活性强的牧草品种耐盐碱能力强。[结论]5种牧草耐盐碱能力强弱的排列顺序为:细茎冰草>北冰草>披碱草>黑麦草>扁穗冰草。
[Objective] The reserch amied to discuss the forage salt tolerance mechanisms and select the forage provided with the high ability of salt tolerance [Method] With the different salt concentrations treated, the biomembrane permeability and the changing rule of protective enzyme activity were studied. [Result] As the salt concentration increased, the forage biomembrane permeability was close interrelated with the MDA content, and the activicty of the catalase and the superoxide dismutase enzyme ascended firstly and then descended. The forage species that the protective enzyme activity was strong had the high ability of salt tolerance. [Conclusion] The sequence of the forage salt tolerance ability according to strong and weak were A gropyron trachycaulum〉A gropyron dasyetac hyum〉Elymus dah uric us 〉Loium p ere nne 〉A gropyron cristatum.
出处
《安徽农业科学》
CAS
北大核心
2008年第8期3101-3102,3133,共3页
Journal of Anhui Agricultural Sciences
基金
吉林省林业厅资助项目(200305)
关键词
牧草
盐碱胁迫
保护酶
Forage
Salt-alkali stress
Protective enzyme
