香菇对培养料中镉的富集作用研究  

Accumulation of Cadmium in Lentinula edodes from Its Compost

作　　者：何旭孔[1,2] 白冰[1] 邢增涛[1] 赵晓燕[1] 邵毅[1] 赵明文[2] 

机构地区：[1]上海市农业科学院农产品质量标准与检测技术研究所,上海201403 [2]南京农业大学生命科学学院,江苏南京210095

出　　处：《食品科学》2013年第21期183-187,共5页Food Science

基　　金："十一五"国家科技支撑计划项目(2009BADB7B06)

摘　　要：目的：研究影响香菇中镉富集的潜在因素，为控制香菇中的镉含量提供相关依据。方法：通过在培养料中添加不同水平的外源镉，研究镉对香菇形态与生理的影响，并考察武香、208和808品种菌株香菇和香菇子实体不同组织部位对镉的富集特性。结果：培养料中镉水平在0.068～7.87mg/kg范围内增加时，香菇子实体中的镉、乙酸和柠檬酸含量逐渐增加；武香和208菌株香菇的生物学效率先增加，后降低，而808菌株香菇的生物学效率一直低于对照组。不同菌株香菇对镉的富集能力强弱随培养料中镉含量的变化而变化；香菇不同组织部位对镉的富集能力差异很大，菌褶对镉的富集倍数是菌盖的1.40～2.17倍，是菌柄的1.92～5.89倍。根据各菌株的镉富集规律得培养料中镉限量参考值分别为：武香菌株0.062mg/kg；208菌株0.040mg/kg；808菌株0.061mg/kg。结论：高含量镉能影响香菇子实体的形态和生理；菌株种类、培养料中镉含量、子实体组织部位均与香菇镉富集有关。Objective： To study the potential factors affecting cadmium （Cd） accumulation and to provide a basis for controllingCd content in Lentinula edodes. Methods： By adding exogenous Cd to at different levels, we studied the major source of Cd andthe impact of Cd on the morphology and physiology of Lentinula edodes, and examined Cd accumulation in different parts fruitbody of strains Wuxiang, 208 and 808. Results： With increasing Cd concentration between 0.068 mg/kg and 7.87 mg/kg in thecompost, Cd, acetic acid and citric acid contents indicated a gradual increase. Biological efficiency of strains Wuxiang and 208exhibited an initial increase followed by a decrease, but strain 208 presented lower biological efficiency than the control group. Theaccumulation capability of Cd in different strains and their different parts varied depending on Cd concentration. The accumulatedCd content in gill was 1.40 to 2.17 times more than that in gap, and 1.92 to 5.89 times more than that in stipe. According to Cdaccumulation patterns in different strains, the limited Cd concentrations in the compost were 0.062, 0.040 mg/kg and0.061 mg/kg for cultivating Lentinula edodes from Strains Wuxiang, 208 and 808, respectively. Conclusion： High concentrationsof Cd can affect the morphology and physiology of Lentinula edodes fruit body. Cd accumulation in Lentinula edodes is correlatedwith the strain species, and Cd concentration in the compost and tissues.

关 键 词：香菇 镉富集 因素 

分 类 号：S646[农业科学—蔬菜学]