| 模拟酸雨对番木瓜不同成熟度叶片膜脂过氧化作用的影响 |
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| 引用本文： | 黄建昌,肖艳,周厚高,.模拟酸雨对番木瓜不同成熟度叶片膜脂过氧化作用的影响[J].广西植物,2005,25(6):562-565,575. |
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| 作者姓名： | 黄建昌 肖艳 周厚高 |
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| 作者单位： | 仲恺农业技术学院园艺系,广东,广州,510225;仲恺农业技术学院园艺系,广东,广州,510225;仲恺农业技术学院园艺系,广东,广州,510225 |
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| 基金项目： | 广东省自然科学基金资助项目（021917）. |
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| 摘 要： | 用不同pH值(4．5、3．5、3．0、2．5)的模拟酸雨处理,研究其对番木瓜不同成熟度叶片细胞膜透性和膜 脂脂防酸组分变化的影响。结果表明,酸雨处理导致番木瓜叶片细胞膜透性、MDA含量、脂氧合酶(LOX)活 性和K+、Ca2+、Mg2+渗出量显著上升,膜脂肪酸组分中饱和脂肪酸含量增加,不饱和脂肪酸含量及不饱和指 数(IUFA)下降,嫩叶比成熟叶对酸雨的反应更敏感。运用生理指标差异达0．05显著水平评价酸雨对番木瓜 的影响阈值,嫩叶在pH3．5,成熟叶在pH3．0。
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| 关 键 词： | 番木瓜 酸雨 膜脂过氧化 细胞膜透性 LOX活性 |
| 文章编号： | 1000-3142（2005）06-0562-04 |
| 收稿时间： | 2004-09-30 |
| 修稿时间： | 2004-09-302005-02-16 |
Impact of simulated acid rain on peroxidation of membrans lipids in leaves of papaya seedlings |
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| HUANG Jian-chang,XIAO Yan,ZHOU Hou-gao.Impact of simulated acid rain on peroxidation of membrans lipids in leaves of papaya seedlings[J].Guihaia,2005,25(6):562-565,575. |
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| Authors: | HUANG Jian-chang XIAO Yan ZHOU Hou-gao |
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| Institution: | Zhongkai Agrotechnical College, Guangzhou 510225, China |
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| Abstract: | Impact of simulated acid rain with various pH values(4. 5,3. 5,3. 0,2. 5)on leaf in different stages of papaya(Carica papaya L, )seedlings were studied. The results showed that permeability,MDA content,LOX activity,leakage amount of K+ ,Ca2+ and Mg2+ ,and saturated fatty acid increased with the decline of the pH value of simulated acid rain, unsaturated fatty acid and IUFA decreased with the decline of the pH value of simulated acid rain. The sensibility to acid rain of spire was higher than climax leaf. The injury threshold value of teneral leaf to simulated acid rain was pH≤3. 0 by the standard of the result using significance tested with L. S. D. at 0. 05 level,and that of adult leaf was pH≤3. 5. |
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| Keywords: | papaya simulated acid rainl peroxidation of membrans lipids permeability LOX activity |
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