论文部分内容阅读
以‘贵农五号’刺梨为材料,研究了刺梨果实对机械伤处理造成的氧化胁迫及其主要抗氧化系统的响应情况.结果表明,机械伤处理可诱导刺梨果实中O2.-和H2O2等活性氧的产生,促使膜脂过氧化水平加剧.在此过程中,抗氧化系统各组分的反应不尽相同:其中,抗坏血酸含量在处理2h内急剧降低,相应地其氧化态DHA的含量则持续增加;SOD活性在处理2h内急剧增强并一直保持较高水平,而抗氧化酶系统中的其它重要组分如APX、POD和CAT等却一直未能检测到活性.
The results showed that mechanical injury could induce the O2.- And H2O2 and other reactive oxygen species, promote the membrane lipid peroxidation level.In this process, the reaction of various components of the antioxidant system are different: Among them, ascorbic acid content decreased rapidly within 2h, correspondingly its oxidation state DHA While the activity of SOD increased sharply and maintained at a high level within 2 h. However, other important components of the antioxidant enzyme system such as APX, POD and CAT had not been able to detect the activity.