Abstract
The production of a toxic complex of proteolytic enzymes by Metarhizium anisopliae was evaluated with 29 nitrogen sources in modified Czapek-Dox medium in submerged cultures. The proteolytic complex is more constitutive than that of Beauveria bassiana and its production is influenced by the quality of complex natural media. The highest activity was attained with Galleria mellonella proteins. The proteolytic complex manifests proteolytic activity of two pH optima, 5.5 and 8.0. The ratio of these two activities differs markedly with the nitrogen source used, but the major proteolytic activity occurs at pH 5.5.
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