| Ca2+对水分胁迫条件下芒果叶片膜脂过氧化及膜保护系统的影响 |
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| 引用本文： | 潘秋红,赖杭桂,陈晓敏,蔡世英.Ca2+对水分胁迫条件下芒果叶片膜脂过氧化及膜保护系统的影响[J].热带作物学报,2000,21(2):30-36. |
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| 作者姓名： | 潘秋红 赖杭桂 陈晓敏 蔡世英 |
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| 作者单位： | 1. 华南热带农业大学农学院,海南,儋州,571737
2. 华南热带农业大学农学院,海南,儋州,571737;农业部热带作物栽培生理学重点开放实验室,海南,儋州,571737 |
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| 摘 要： | 以芒果幼苗为材料，研究Ｃａ＾２＋对水分胁迫条件下，叶片膜脂过氧化和膜保护系统的效应。结果表明：与对照叶片相比，涂施Ｃａ＾２＋后，叶片含水量、超氧化物歧化酶（ＳＯＤ）活性及Ｖｃ含量下降明显减慢；过氧化物酶（ＰＯＤ）活性上升加快且幅度加大，而下降延迟；丙二醛（ＭＤＡ）积累显减少。Ｃａ＾２＋专一性螯合剂ＥＧＴＡ可削弱Ｃａ＾２＋的效应。ＣａＭ拮抗剂氯丙嗪（ＣＰＺ）对叶片ＳＯＤ活性和ＰＯＤ活性有抑制作用，
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| 关 键 词： | Ca^2＋ 水分胁迫 芒果叶片 膜保护系统 |
Effect of Ca2+ on Membrane Lipid Peroxidation and Protective Systems in leaves of Mango Seedlings Under Water Stress |
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| Pan Quihong,Lai Hanggui,Chen Xiaoming,Cai Shiying.Effect of Ca2+ on Membrane Lipid Peroxidation and Protective Systems in leaves of Mango Seedlings Under Water Stress[J].Chinese Journal of Tropical Crops,2000,21(2):30-36. |
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| Authors: | Pan Quihong Lai Hanggui Chen Xiaoming Cai Shiying |
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| Abstract: | The effects of Ca2 on membrane lipid peroxidation and protective system were studied in leaves of intact mango seedlings under water stress and in detached leaves after 48 h of PEG osmotic stress. The results indicated that Ca2 sprayed upon the leaf surface of mango seedlings under water stress obviously slowed down the decreasing of leaves water content, of superoxidase dismutase (SOD) activity and of ascorbic acid (Vc) content. The peroxidase (POD) activity of the leaf surface was increased after spraying and its decreasing rate was hence lessened; the malondialdehyde (MDA) accumulation was reduced evidently. EGTA pretreatment could reduce the effect of Ca2 , and chlorpromazine (cpz) pretreatment inhibited the activities of SOD and POD. It is thought that Ca2 increased or activated cellular calmodulin (CaM) and then regulated the activities of some relative enzymes, thereby reducing the injury of water stress to the membrane of mango leaves. |
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| Keywords: | Ca2 water stress mango seedlings membrane protective system |
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