Cd Zn交互作用对金针菇富集重金属的影响

以金针菇为试验材料.在基质中分别单独添加和同时添加不同浓度的Cd、Zn,采用栽培袋接种培养法研究了食用菌富集Cd、Zn以及Cd、Zn交互作用对食用菌累积重金属的影响.结果表明,低浓度的Cd(<1mg·kg-1)、Zn(<600mg·kg-1)能够促进金针菇的生长,但是高浓度的Cd、Zn对金针菇生长会产生抑制作用.随着栽培基质中Cd、Zn处理浓度的增高,金针菇子实体中的Cd、Zn浓度也随之增加.Cd-Zn之间表现为瓦相拮扰作用,金针菇子实体内的Cd含量随着培养基质中Zn浓度的增加而显著降低(P<0.05),Cd浓度降低比例与Zn/Cd比值之间呈显著的正相关(P<0.01).在Zn处理浓度为600 mg·kg-1,Cd处理浓度分别为1 mg·kg-1和10时,与不加Zn相比,金针菇子实体Cd含量分别降低29%和11%.Cd对Zn也表现出一定的拮抗作用,但是除在Zn为0和Cd为10mg·kg-1处理时拮抗作用显品著(P<0.05)外,其余处理没有达到显著水平.而在10mg·kg-1Cd和600mg·kg-1Zn处理条件下,金针菇生物量显著下降,可能是由于Cd-Zn协同作用,造成毒害作用的结果.

Effects of Interactions Between Cd and Zn on Accumulation of Heavy Metals in the Flammulina velutipes

The edible fungi have been a very popular delicacy especially in China and some central European countries because they are a good source of carbohydrate,protein,fats,and minerals.However the edible fungi can also accumulate heavy metals from the environment.A substrate cultivating experiment was conducted to study the effect of Cd,Zn,and their interaction on the accumulation of heavy metals in the Flammulina velutipes.The results showed that the yield of Flammulina velutipes was improved at lower doses of ...