Caesium Uptake in Mushroom—Comparison with Coexisting Elements and Effect of Ammonium Ion as a Competitor, by Laboratory Experiments Using Hebeloma vinosophyllum—

Abstract

An ectomycorrhizal ammonia fungus Hebeloma vinosophyllum was cultivated in the Ohta's liquid medium with Cs and different concentrations of NH₄⁺. This fungus absorbed caesium and coexisting elements(K, Ca, Mg, Zn, Cu, Fe and P) with the highly transfer factors. The highest translocation from mycelium to fruit body was observed in Cs among 8 analysed elements. The uptake of Cs might have a similar pattern to those of K and P. However, the high concentration of NH₄⁺ might affect as the competitor to the uptake of both Cs and K, but not to the uptake of P. The addition of NH₄⁺ affected more the uptake of Cs than that of K.