中文摘要：

为给开发和选育耐盐植物资源提供科学依据,以温室内盆栽1年生欧李幼苗为试材,研究欧李在盐胁迫下其抗氧化酶、呼吸参数及离子含量的变化,探究欧李对盐处理的耐受性。结果表明：盐胁迫下,欧李植株根部抗氧化酶活性、MDA含量和电解质渗透率均随时间的延长呈上升趋势;总呼吸速率随处理时间的延长而增强,而交替呼吸（alternative,Alt）和细胞色素（cytochrome,Cyt）呼吸出现拮抗效应,交替呼吸比率上升,细胞色素途径呼吸下降。欧李根部和叶片K＋含量随处理时间的延长而降低,Na＋含量逐渐积累;根部Ca2＋含量没有显著变化,但叶片中含量下降;根部Mg2＋含量呈下降趋势,叶片中含量上升;Zn2＋和Cu2＋含量在叶组织中均无显著变化,根部中含量略微升高。根部和叶片中K＋/Na＋随盐胁迫时间的延长而降低,说明根部对K＋的吸收受到了盐胁迫的影响。

英文摘要：

In order to provide a scientific basis for developing and breeding salt tolerant plant resources, taking potting one-year old Cerasus humilis seedlings in greenhouse as materials, changes of antioxidant enzyme activities, respiration parameters, ion contents were determined, and resistance to salt stress in C. humilis were explained. The results showed that antioxidant enzyme activities, MDA content and electrolytic leakage rate in roots of C. humilis seedling were significantly increased with stress time extended. Total respiration rate was increased with stress time extended. But the antagonism from alternative respiration and cytochrome respiration occurred, namely altern~itive respiration was enhanced and cytochrome respiration was decreased. K＋ content in both leaves and roots was decreased with stress time extended, and Na＋ content accumulated gradually. Ca2＋ content in roots had no significant change, but it declined in leaves. Mg2＋ content in roots showed a declining pattern, but it was opposite in leaves. Both Zn2＋ and Cu1＋ contents in leaves had no significant change, and they were increased slightly in roots. Ratio of K＋ to Na＋ in roots and leaves was decreased with salt stress time extended, indicating that the absorption selectivity ofK＋ in root was affected by salt stress.