Uptake and toxicological effects of some heavy metals on Pleurotus sajor-caju (Fr.) singer.
The uptake of heavy metals at sublethal concentrations by the mycelia and sporocarps of an edible fungus Pleurotus sajor-caju was measured by an atomic absorption spectrophotometer, and their impact on growth, productivity, and cellular proteins was also studied. Mycelia demonstrated the lowest uptake of Co2+ (11 micrograms ml-1) and Hg2+ (12 micrograms ml-1) and the highest uptake of Cu2+ (182 micrograms ml-1) and Cd2+ (178 micrograms ml-1). Sporocarps obtained from the substrate treated separately with Pb2+ (100 micrograms ml-1) and CD2+ (6 micrograms ml-1) indicated a minimum and maximum uptake of Pb2+ (7 micrograms g-1) and Cd2+ (33 micrograms g-1), respectively. Although Cu2+ and Cd2+ at 6 micrograms ml-1 indicated 41 and 93% growth reduction, Pb2+ and Hg2+ also caused more than 85% reduction of growth at 15 and 6 micrograms ml-1, respectively. Pb2+ reduced mycelial protein significantly (36%), but Hg2+ caused maximum reduction (30%) of proteins in sporocarps. Separate treatment of spawned substrate with test heavy metals reduced biological efficiency of sporocarp production, but markedly with Pb2+.
Purkayastha
R P
RP
Department of Botany, University of Calcutta, India.
Mitra
A K
AK
Bhattacharyya
B
B
D005656:Fungal Proteins / Q000096:biosynthesis; D008670:Metals / Q000032:analysis / Q000493:pharmacokinetics* / Q000633:toxicity*; D011124:Polyporaceae / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D013054:Spectrophotometry, Atomic
D005656:Fungal Proteins; D008670:Metals