Accumulation and translocation of lead and cadmium in Lyophyllum decastes

Lyophyllum decastes (L. decastes) is a very precious edible mushroom. With simple structure, mushrooms have been proved to have the phenomenon of accumulating heavy metals. To investigate the accumulation and transfer of L. decastes to heavy metals and the effects of heavy metals on agronomic traits and yield, we used lead (Pb) and cadmium (Cd) inhibitory test for L. decastes. The results indicated that the addition of Pb and Cd affected the growth of aerial mycelium, and thus decreased the growth rate of mycelia. At a Cd concentration of 50 mg L^-1, the mycelium reached its maximum tolerance concentration, but the maximum tolerance concentration of the mycelium had exceeded 1500 mg L^-1. The addition of Pb and Cd led to the deterioration of agronomic traits and the decrease of yield. At the same concentration (20 mg kg^-1), the negative effects of Cd on agronomic traits and yield were greater than that of Pb. The BAF values of the pileus and stipes under Pb treatments were < 1, which indicated that L. decastes was the bioexcluders of the elements Pb. The TF values were all greater than 1 under Cd treatments, indicated that the transfer ability of Cd was strong. This advancement has enhanced our knowledge of how heavy metals accumulate and distribute in mushrooms. The transfer ability of Cd was strong.