田头菇菌丝体对镉、铅及其复合胁迫的生长与富集响应  

Growth and Enrichment Responses of Agrocybe praecox Hyphae to Single and Combined Stress of Cd and Pb

作　　者：安鑫龙[1,2] 周启星[1,3] 李婷[1] 张宁[1] 

机构地区：[1]南开大学环境科学与工程学院,环境污染过程与基准教育部重点实验室,天津300071 [2]河北农业大学海洋学院,河北秦皇岛066003 [3]中国科学院沈阳应用生态研究所,中国科学院陆地生态过程重点实验室,辽宁沈阳110016

出　　处：《中山大学学报（自然科学版）》2008年第5期93-97,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：高等学校科技创新工程重大项目培育资金资助项目(707011);海外青年学者合作研究基金资助项目(20428707);中俄合作研究资助项目(20611120015)

摘　　要：在PDA平板培养条件下,研究了镉、铅及其复合污染对田头菇菌丝体生长的影响以及田头菇菌丝体对生长基质中镉、铅的生物富集作用。结果表明,在试验设置质量浓度范围内,菌丝生长势、菌落直径和菌丝体干质量等均随着重金属质量浓度的增大而减弱(小)或降低。田头菇菌丝体对Cd、Pb均具有生物富集作用,并且随着重金属质量浓度的增大菌丝体中重金属质量分数逐渐增大,初步认为Cd、Pb复合污染促进了菌丝体对Pb的吸收而抑制了对Cd的吸收。Under the condition of plate culture, the effects of Cd, Pb and their combined stress on the growth of hyphae of Agrocybe praecox as well as the Cd and Pb bioaccumulation in the solid potato dextrose agar medium was studied. The mycelial growth vigor, colony diameter and dry mycelial weight were reduced as responding to the inreasing Cd and Pb stress in the culture media. The results also showed that bioaccumulation of Cd and Pb in hyphae of Agrocybe praecox increased accompanying with the increments of the Cd and Pb concentrations in the media, and bioaccumulation of Pb in hyphae was promoted while that of Cd was inhibited under the combined stress of Cd and Pb.

关 键 词：田头菇 镉 铅 复合胁迫 生物富集 

分 类 号：S646[农业科学—蔬菜学] X131.2[农业科学—园艺学]