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大白菜耐热性的生理研究 Ⅲ.酶性和非酶性活性氧清除能力与耐热性
引用本文:叶陈亮,柯玉琴,陈伟.大白菜耐热性的生理研究 Ⅲ.酶性和非酶性活性氧清除能力与耐热性[J].福建农林大学学报(自然科学版),1997(4).
作者姓名:叶陈亮  柯玉琴  陈伟
作者单位:福建农业大学基础部
摘    要:耐热性不同的2个大白菜品种经38℃高温胁迫后O-2含量明显增加,但耐热的亚蔬1号增幅远小于不耐热的“106”品种.高温胁迫使亚蔬1号的超氧物歧化酶(SOD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(ASP)活性提高,“106”品种除CAT活性稍有提高外,SOD和ASP活性均下降.2个品种还原型谷胱甘肽(GSH)含量增加不明显,但亚蔬1号仍稍高于“106”品种;抗坏血酸(AsA)含量均减少,亚蔬1号降幅小于“106”品种.结果显示,在高温胁迫下,亚蔬1号较“106”品种具有较高的酶性和非酶性活性氧清除能力

关 键 词:大白菜  高温胁迫  耐热性  活性氧  清除能力

A study on the physiology of heat tolerance in Chinese cabbage Ⅲ.Ability to scavenge active oxygen of emzyme and non emzyme system and heat tolerance
Abstract:After 2 Chinese cabbage cultivars with different heat tolerance were stressed at 38℃,the O-2 content increased obviously, but much less in heat tolerant Yashu No.1 than in heat sensitive “106”.Under high temperature stress,the activities of superoxide dismutase (SOD), catalase (CAT) and ascorbic acid peroxidase (ASP) increased in Yashu No.1,while the activities of SOD and ASP decreased in “106”, though CAT activity slightly increased.The content of glutathione reduced form (GSH) in 2 cultivars did not increase much,but the increase in Yashu No.1 was a little more than that in “106”. Ascorbic acid (AsA) content decreased in both cultivars,but the decrease in Yashu No.1 was less than that in “106”. The results showed that the ability to scavenge the active oxygen of emzyme and non emzyme system in Yashu No.1 was greater than that in “106” under high temperature stress.
Keywords:Chinese cabbage  high temperature stress  heat tolerance  active oxygen  ability to scavenge
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