Effects of Some Metals on Laccase, MnP Enzym Activities and Dye Decolorization of Pleurotus species

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This study searches the influence of distinct metals (HgCl2, Pb(NO3)2, Ni(NO3)2.6H2O, ZnSO4.7H2O, CoCl2.6H2O, Cd(NO3)2.4H2O, CuSO4.5H2O) on decolorization and extracelluler enzym activities by using Pleurotus ostreatus, Pleurotus sajor-caju ve Pleurotus florida. The study has found the inhibition of P. sajor caju’s development statistically meaningful (p≤0.05) in Pb and Ni’s 0,001 mM≤; Hg, Pb and Cd’s 0.005 mM≤ and Co’s 0.05 mM≤ concentrations. In side of P. florida, while 0.001 mM≤ concentration in all tested metals except for Ni an Cd is significant, the inhibition in Ni’s 0.005 mM≤ and Cd’s 0.01 mM≤ concentrations has been found statistically meaningful. In P. ostreatus, the inhibition has been determined statistically significant following Hg and Pb 0,01 mM ≤ concentration. Inhibition of development in 0,001 mM ≤ concentration has been found considerable in other metals. Enzym assays showed that metals did not make a significant change in enzyme activity of laccase. In P. sajor-caju all metal concentrations which were 20% inhibition have increased MnP activities compared with control groups In Pleurotus florida, Co 42% has increased MnP activity which is followed by Pb with 32%. MnP activities of Pleurotus ostreatus were increased with Hg and Ni but were decreased with Zn and Cd.

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Decolorization , Laccase , Manganase peroxidase , Pleurotus sp

Afyon Kocatepe University Journal Of Science an‎d Engineering

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Afyon Kocatepe University Journal Of Science an‎d Engineering