双孢蘑菇对Pb^(2+)·Cd^(2+)的耐受与富集  

Tolerance and Bioaccumulation of Agaricus bisporus to Lead and Cadmium

作　　者：刘敏[1,2] 吴小建[1,2] 李明娟[1] 黎金锋[1] 刘斌[1] 

机构地区：[1]广西大学应用微生物研究所,广西南宁530005 [2]广西大学生命科学与技术学院,广西南宁530005

出　　处：《安徽农业科学》2011年第23期14230-14232,14269,共4页Journal of Anhui Agricultural Sciences

基　　金：广西自然科学基金(桂科自0991039);广西研究生教育创新计划项目(105930903063)

摘　　要：[目的]研究双孢蘑菇对Pb2+、Cd2+的耐受与富集效应。[方法]在双孢蘑菇培养基中添加不同浓度的Pb2+、Cd2+,采用原子吸收法测定其子实体和菌丝体的Pb2+、Cd2+含量。[结果]在试验浓度范围内,双孢蘑菇对Pb2+、Cd2+的富集量随Pb2+、Cd2+浓度的增加而增加,子实体不同部位富集量由高到低依次为菌褶>菌盖>菌柄,其中Pb2+含量分别为19.42、16.42、15.30 mg/kg,Cd2+含量分别为38.56、35.73、11.80 mg/kg。复合胁迫下,Pb2+的富集量高于单一Pb2+胁迫而Cd2+的富集量低于单一Cd2+胁迫。[结论]双孢蘑菇对Pb2+、Cd2+具有较强的耐受与富集作用。[Objective]The research aimed to explore the tolerance and accumulation of Agaricus bisporus to lead and cadmium.[Method]A.bisporus was cultivated in medium with different concn.of lead and cadmium,and the lead and the cadmium contents in fruiting body and mycelia of A.bisporus were measured by the flame atomic absorption spectrophotometry.[Result]In the tested concn.range,the bioaccumulation of lead and cadmium in A.bisporus were increased with increasing lead and cadmium concn.in the medium,the contents of lead and cadmium were different in different parts of fruiting body and they were in the order of lamellae pileus stipe,being 19.42,16.42 and 15.30 mg/kg for the lead content,and 38.56,35.73 and 11.80 mg/kg for the cadmium content resp.The bioaccumulation amount of lead in A.bisporus was generally higher under the combined stress than under the single lead stress,but the bioaccumulation amount of cadmium was lower than that under the single cadmium stress.[Conclusion]A.bisporus had a high tolerance and accumulation to the lead and cadmium.

关 键 词：双孢蘑菇 PB2+ Cd2+ 生物富集 

分 类 号：S181[农业科学—农业基础科学]