Production of enzymes by five Pleurotus spp. developed in solid and liquid state fermentation using three agricultural wastes

Journal Title: Journal of Multidisciplinary Sciences - Year 2019, Vol 1, Issue 2

Abstract

Oyster mushrooms (Pleurotus spp.) can bioconvert lignocellulosic residues due to the secretion of extracellular enzymes. The production of hydrolytic and oxidative enzymes by five Pleurotus spp. (P. ostreatus, P. columbinus, P. pulmonarius, P. sajor-caju, and P. floridanus), developed in the solid and liquid state of fermentation using three argo-wastes (rice straw, sugarcane bagasse, and cotton waste), as substrate was evaluated in this work. The total nitrogen and potassium percentage were the highest in the case of rice straw, (0.96% and 0.60%). Also, the biological efficiency (BE), from these results, was the highest in the case of P. sajor-caju and P. columbinus recorded 64.4% on rice straw. It was observed that the submerged liquid fermentation (SmF) was suitable for the growth of all Pleurotus species. Also, the high value of enzymatic activity was determined through this study was, higher in the submerged liquid fermentation SmF, than those produced during solid-state culture (SSF). Among proteolytic enzymes, protease produced by the five Pleurotus spp. presenting the highest enzymatic activity (23.80 U/mL) on SmF and (22.56 U/mg) on SSF. Considering the oxidative enzymes, laccase produced, the highest value (1.99 U/mL) of laccase activity of filtrate was estimated from P. ostreatus cultivated on sugarcane bagasse of SmF. Low enzyme level (0.39 U/mg) was manganese peroxidase, obtained from P. floridanus cultivated on the cotton waste of SSF. The enzymatic levels of α-amylase, β-amylase, cellulose, cellobiohydrolase, laccase, and lignin peroxidase were from 2.9-0.50 U/mL.

Authors and Affiliations

Khayria Mohmed Abdel-Gawad, Mona Fatthy Dawood, Atef Abdel-Azeez, Mahmoud Ahmed Ahmed Rashwan

Keywords

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