Extracellular enzymes of some black aspergilli in Singapore

Abstract

Ten strains of Aspergillus niger and one strain of A. awamori showed proteolytic activity and amylolytic and cellulolytic activities were observed in all the strains except in A. niger isolated from rice grains. Aspergillus awamori was shown to be the best producer of amylolytic enzymes but poorest for cellulases. All the strains were shown to be good producers of proteolytic enzymes while the strain from rubber wood seemed to be the best cellulase-producing strain. Both single conidium and hyphal tip inoculation techniques gave similar results. Differences in the levels of extracellular enzymes produced by similar strains were also observed using the two different techniques. © 1985 Oxford University Press.