Phagocytic and humoral immunity of the adult cotton boll weevil, Anthonomus grandis (Coleoptera: Curculionidae), to Serratia marcescens |
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Authors: | Donald D Ourth David L Smalley |
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Institution: | Department of Biology, Memphis State University, Memphis, Tennessee 38152 USA |
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Abstract: | This investigation determined phagocytic, lysozymal, and bactericidal defensive responses of adult laboratory-reared cotton boll weevils, Anthonomus grandis. Phagocytosis was first demonstrated in boll weevils at 3 hr following injection of live Serratia marcescens. Maximum phagocytosis was found in 16.4% of plasmatocytes at the end of 16 hr postinjection. Lysozyme activity was demonstrated in both inoculated and uninoculated boll weevils. Peak lysozyme activity of 6.9 μg/ml was found at 48 hr following inoculation of heat-killed Serratia marcescens. Bactericidal activity was demonstrated in inoculated boll weevils but not in uninoculated boll weevils. Peak bactericidal activity occurred at 24 hr following inoculation of heat-killed Serratia marcescens. Lysozymal and bactericidal activities were shown to be separate functions. |
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Keywords: | cotton boll weevil immunity phagocytosis lysozyme bactericide |
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