| 低温胁迫下弓葵幼苗膜脂过氧化及保护酶活性的变化 |
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| 引用本文： | 杨盛昌,谢潮添,张平,陈德海,丁印龙,廖启炓.低温胁迫下弓葵幼苗膜脂过氧化及保护酶活性的变化[J].园艺学报,2003,30(1):104-106. |
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| 作者姓名： | 杨盛昌 谢潮添 张平 陈德海 丁印龙 廖启炓 |
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| 作者单位： | ( 厦门大学生命科学学院, 厦门361005 ; 厦门园林植物园, 厦门361003) |
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| 基金项目： | 国家建设部和厦门市建委资助项目 |
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| 摘 要： | 低温胁迫下弓葵( Butia capitata Becc) 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(6 h) 内升高,然后下降, 24 h 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6 h 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48 h 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。
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| 关 键 词： | 弓葵 低温胁迫 膜脂过氧化 保护酶 |
| 文章编号： | 0513-353X(2003)01-0104-03 |
| 收稿时间： | 2002-4-3 |
| 修稿时间： | 2002年4月3日 |
Changes in Membrane Lipid Peroxidation and Activities of Cell Defense Enzyme in Leaves of Butia capitata Becc Seedling under Low Temperature Stress |
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| Yang Shengchang ,Xie Chaotian ,Zhang Ping ,Chen Dehai ,Ding Yinlong ,and Liao Qiliao.Changes in Membrane Lipid Peroxidation and Activities of Cell Defense Enzyme in Leaves of Butia capitata Becc Seedling under Low Temperature Stress[J].Acta Horticulturae Sinica,2003,30(1):104-106. |
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| Authors: | Yang Shengchang Xie Chaotian Zhang Ping Chen Dehai Ding Yinlong and Liao Qiliao |
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| Institution: | Department of Respiratory Medicine,The Second Clinical Hospital of Jilin University,Changchun 130041,China |
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| Abstract: | Under 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 24 h of - 8 ℃. Cell defense enzymes SOD , POD and CAT activity raised immediately in 6 h and then decreased under - 8 ℃. They were severely inhibited by low temperature stress. Under 2 ℃, SOD activity had little change in 6 h , 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 48 h , it gave us a hint that 2 ℃ low temperature stress probably could not inhibit , but promote POD activity in 48 h for leaves of Butia capitataseedling. |
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| Keywords: | Butia capitata Becc seedling Low temperature stress Membrane lipid peroxidation Cell defense enzyme |
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