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供职机构:安徽农业大学生命科学学院更多>>
发文基金:博士科研启动基金安徽省高校省级自然科学研究项目国家自然科学基金更多>>
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根生长法测定柳树对重金属的耐性研究被引量:8
2010年
[目的]探讨柳树对单一或复合重金属的耐性大小,为木本植物修复重金属污染土壤提供理论依据。[方法]采用根生长法研究重金属Cu2+、Pb2+、Zn2+及3者混合液对柳树枝条不定根生长的影响。[结果]不同浓度的重金属溶液对柳树枝条不定根的生长存在显著影响。当Cu2+浓度高于15 mg/L、混合溶液浓度高于20 mg/L、Zn2+浓度高于30 mg/L时,柳树枝条均无不定根生成;溶液浓度达到40mg/L时,只有Pb2+处理组能长出不定根;随着溶液浓度的升高,柳树枝条不定根的数目逐渐下降;浓度为5 mg/L的Zn2+处理组柳树枝条不定根数目最多。其他浓度中,Pb2+处理组不定根数目最多、根长及平均根长最长、生根率最高。[结论]柳树枝条对Pb2+的耐受性最强,对Cu2+的耐受性最弱。柳树对3种重金属及3者混合液的耐受性大小依次为:Pb2+>Zn2+>Cu2++Pb2++Zn2+>Cu2+。
周疆丽田胜尼张玉琼占明
关键词:柳树重金属耐性
Tolerance of Salix matsudana to Heavy Metals Determined by Root Elongation Method
2010年
[Objective]The research aimed to discuss the tolerance of Salix matsudana to single or compound heavy metals and provide theoretical basis for renovating polluted soil by heavy metals with woody plants.[Method]Using root elongation method,the effects of heavy metal Cu^2+,Pb^2+,Zn^2+ and their mixed solution on the adventitious roots growth of S.matsudana cuttings were studied.[Result]The adventitious roots growth of S.matsudana cuttings was obviously affected by different concentrations of heavy metals solution.Adventitious roots of S.matsudana cuttings could not grow while the concentration of Cu^2+ was higher than 15 mg/L,the mixture solution concentration was higher than 20 mg/L and Zn^2+ concentration was higher than 30 mg/L.When the solution concentration reached 40 mg/L,adventitious roots of S.matsudana cuttings could grow only in Pb^2+ treatment group.With the increasing of the solution concentration,the number of adventitious roots of S.matsudana cuttings gradually decreased.In 5 mg/L Zn^2+ treatment group,the number of adventitious roots of S.matsudana cuttings was the most,the longest root length and average root length were the longest and the rooting rate was the highest.[Conclusion]The tolerance of S.matsudana to Pb^2+ was strongest and its tolerance to Cu^2+ was the weakest.The tolerance order of S.matsudana to three kinds of heavy metals and their mixed solution was as following:Pb^2+〉Zn^2+〉Cu^2++Pb^2++Zn^2+〉Cu^2+.
田胜尼周疆丽张玉琼占明
关键词:TOLERANCE
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