Abstract

Entomophthora egressa protoplasts either exposed to or not exposed to trypsin were not attacked by either trypsinized or non-trypsinized larval spruce budworm granulocytes. Granulocytes adhered to protoplasts exposed to papain, and this adhesion could be prevented by papainizing the hemocytes. Differences were observed in the responses of two E. egressa isolates when exposed to papain or to the papain-control solutions. Exposure of hemocytes to trypsin did not reduce either the number of Absidia repens sporangiospores per granulocyte or the percentage of granulocytes with spores, whereas, exposure to papain did. The role of surface proteins, particularly glycoproteins, in hemocyte-fungal cell interactions is briefly discussed.

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