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dc.contributor.author杨盛昌
dc.contributor.author谢潮添
dc.contributor.author张平
dc.contributor.author陈德海
dc.contributor.author丁印龙
dc.contributor.author廖启炓
dc.date.accessioned2017-11-14T02:44:36Z
dc.date.available2017-11-14T02:44:36Z
dc.date.issued2003-04-30
dc.identifier.citation园艺学报,2003,(01):106-108
dc.identifier.issn0513-353X
dc.identifier.otherYYXB200301028
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/153518
dc.description.abstract低温胁迫下弓葵 (ButiacapitataBecc)幼苗叶片的MDA含量逐渐增加 ,膜脂过氧化作用增强。- 8℃条件下的膜脂过氧化作用明显强于 2℃。细胞膜透性在 2℃条件下变化不大 ,- 8℃时则随低温胁迫时间延长而急剧上升 ,细胞膜受到伤害。 - 8℃胁迫下细胞保护酶SOD、POD和CAT活性短期 (6h)内升高 ,然后下降 ,2 4h以后 3种保护酶受到低温胁迫的严重抑制。在 2℃胁迫下 ,SOD活性在 6h内变化不大 ,随后下降 ;CAT活性变化趋势与 - 8℃时相似 ,但变化幅度较小 ;POD虽也呈现先升后降的趋势 ,但降幅明显小于升幅 ,至 4 8h时POD活性仍维持较高水平。 2℃低温胁迫不是抑制而是促进POD活性的提高
dc.description.abstractUnder low temperature stress,as a product of membrane liquid peroxidation,malondialdehyde(MDA)content in leaves of Butia capitata seedling gradually increased with elongation of stress time and stress intensity. Membrane lipid peroxidation raised more quickly under -8℃ than that under 2℃.As for membrane permeability,there was only a little change under 2℃,but it showed a sharp increase under -8℃,indicating that cell membrane suffered severe damage after 24h of -8℃.Cell defense enzymes SOD,POD and CAT activity raised immediately in 6h and then decreased under -8℃.They were severely inhibited by low temperature stress.Under 2℃,SOD activity had little change in 6h,and then decreased.CAT activity had a similar trend with that under -8℃,but it changed by a lower ranger.Though POD activity also took a trend of increasing firstly and then decreasing,POD activity maintained a high level until 48h,it gave us a hint that 2℃ low temperature stress probably could not inhibit,but promote POD activity in 48h for leaves of Butia capitata seedling.
dc.description.sponsorship国家建设部和厦门市建委资助项目
dc.language.isozh_CN
dc.subject弓葵
dc.subject低温胁迫
dc.subject膜脂过氧化
dc.subject保护酶
dc.subjectButia capitata Becc seedling
dc.subjectLow temperature stress
dc.subjectMembrane lipid peroxidation
dc.subjectCell defense enzyme
dc.title低温胁迫下弓葵幼苗膜脂过氧化及保护酶活性的变化
dc.title.alternativeChanges in Membrane Lipid Peroxidation and Activities of Cell Defense Enzyme in Leaves of Butia capitata Becc Seedling under Low Temperature Stress
dc.typeArticle


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