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Appl Environ Microbiol. 1983 November; 46(5): 1093-1096
Copyright © 1983, American Society for Microbiology. All Rights Reserved.

Binding Characteristics of Lectins Involved in the Trapping of Nematodes by Fungi

Microbial Ecology Laboratory, Department of Biological Sciences, Drexel University, Philadelphia, Pennsylvania 19104

ABSTRACT

Seventeen saccharides were tested for their ability to bind to the trap lectins of three species of nematode-trapping fungi and prevent nematode capture. The lectin of Arthrobotrys conoides was found to be inhibited by -D-glucose/D-mannose and similar saccharides. The lectins of Monacrosporium eudermatum and Monacrosporium rutgeriensis were inhibited by -L-fucose and 2-deoxy-D-glucose, respectively. Human group O(H) erythrocytes agglutinated to traps of M. eudermatum but not A. conoides or M. rutgeriensis. There was no agglutination of group A or B to traps formed by all three fungi. Exposure of the traps to trypsin eliminated the ability to capture nematodes. The presence of D-glucose/D-mannose and L-fucose residues on the nematode cuticle was suggested through the use of commercially prepared lectin-peroxidase conjugates.