| 铜胁迫对白茅根际和非根际土壤酶活性影响的研究 |
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| 引用本文： | 晋松,吴克,俞志敏,金杰,杨红,储玲.铜胁迫对白茅根际和非根际土壤酶活性影响的研究[J].土壤通报,2011(4):937-941. |
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| 作者姓名： | 晋松 吴克 俞志敏 金杰 杨红 储玲 |
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| 作者单位： | 合肥学院生物与环境工程系应用酶学与工程重点实验室;中德环境技术转化中心;生物环境与生态安全安徽省高校省级重点实验室; |
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| 基金项目： | 安徽省自然科学基金项目(090415218); 安徽高校省级自然科学研究重点项目(KJ2009A049Z); 合肥学院2011年度科研发展基金(11KY02ZR) |
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| 摘 要： | 通过盆栽实验研究了重金属Cu递进胁迫对白茅根际和非根际土壤酶活性的影响。结果表明,随着Cu浓度的增加,根际和非根际土壤的pH值下降、土壤酸化,而电导率呈持续上升,但根际土壤的pH值持续高于非根际土壤且更接近于中性。在梯度浓度的重金属Cu胁迫下,根际和非根际蔗糖酶活性随Cu浓度增加均表现出先升后降的趋势,但根际土壤的蔗糖酶活性在Cu浓度为1000 mg kg-1时达到峰值,而非根际土壤则在Cu浓度为500 mg kg-1时已到达峰值。白茅根际和非根际土壤中磷酸酶、脲酶和过氧化氢酶活性受Cu离子的影响均表现出持续下降的趋势,但各酶受抑制率各不相同。对梯度浓度Cu胁迫下的白茅根际和非根际土壤酶活性而言,四种酶在根际土壤中的活性普遍高于非根际土壤,且Cu2+对根际酶活性的抑制率也大于非根际土壤酶。对重金属单Cu污染敏感的土壤酶类依次为磷酸酶>蔗糖酶>脲酶>过氧化氢酶,其中磷酸酶可作为检测污染土壤的指示酶。
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| 关 键 词： | Cu胁迫 根际 非根际 土壤酶系统 |
Physiological Response of Imperata cylindrica var.majo Seedlings on Growth and Antioxidant Enzyme System under Cu Stress |
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| JIN Song ,WU Ke ,YU Zhi-min ,JIN Jie ,YANG Hong ,CHU Ling.Physiological Response of Imperata cylindrica var.majo Seedlings on Growth and Antioxidant Enzyme System under Cu Stress[J].Chinese Journal of Soil Science,2011(4):937-941. |
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| Authors: | JIN Song WU Ke YU Zhi-min JIN Jie YANG Hong CHU Ling |
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| Institution: | JIN Song 1,WU Ke 1,2,YU Zhi-min 1,JIN Jie 1,YANG Hong 1,CHU Ling 3(1.Department of Biological and Environmental Engineering,Key Laboratory of Applied Enzymology & Engineering,Hefei 230022,China,2.Chinese-German Transfer Center of Environmental Technology,Hefei University,3.Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui Higher Education,Wuhu 241000,China) |
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| Abstract: | The effects of copper(Cu) progressive stress on the soil enzymes system of I.cylindrica var.majo.were studied by pot experiments.The result showed that the values of electric conductivity increased and the pH values decreased gradually with the increase of concentration of Cu;however,the pH values in rhizosphere soils were higher than in non-rhizosphere soils.Under progressive stress treatments of Cu,the invertase activaties in rhizosphere and non-rhizosphere soils could be improved under low concentration ... |
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| Keywords: | Cu stress Rhizosphere Non-rhizosphere Soil enzymes |
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