Studies on uptake of cesium by mycelium of the mushroom ( Pleurotus ostreatus) by133Cs-NMR.

Sufficient information on the mechanisms of radiocesium translation from substrate to mushroom and long-term radiocesium accumulation is still not available, though high concentrations of radiocesium were reported in the fruiting bodies of various species of mushrooms especially after the Chernobyl accident. We studied the concentration and existing state of Cs in the cultured mycelium of the edible mushroom ( Pleurotus ostreatus (Fr.) Kummer Y-1) using NMR. The¹³³Cs NMR resulting spectra exhibited two resonance signals arising from the mycelium whereas one resonance signal from the external medium and CsCl standard solution. The chemical form of the signal in the downfield found in the only mycelium might be concerned with Cs accumulation in the mycelium. [ABSTRACT FROM AUTHOR]