Effects of certain lipid compounds on growth and asexual multiplication of Mesocestoides corti (Cestoda) tetrathyridia |
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Authors: | JC Kowalski RE Thorson |
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Institution: | Department of Biology, University of Notre Dame, Notre Dame, IN 46556, U.S.A. |
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Abstract: | The effects of Williams and Law mixture (W-L), farnesol (juvenile hormone mimics), ecdysterone (molting hormone analog), cholesterol, and stigmasterol on growth and asexual reproduction of Mesocestoides corti larvae in vivo and in vitro were studied. W-L and ecdysterone stimulated an increase in larval asexual reproduction under in vivo conditions, however, cholesterol had no effect on the larvae in vivo. In vitro, cholesterol stimulated a slight increase in reproduction but had no effect on growth; stigmasterol appeared to be somewhat detrimental to the larvae. In vitro, W-L, farnesol, and ecdysterone stimulated by varying amounts an increase in growth (as measured by larval size) and asexual reproduction. Lipid extraction of M. corti larvae and Hymenolepis diminuta adults, followed by a series of thin-layer chromatograms, yielded 2 compounds (I-B and I-D) which affected M. corti larvae in vitro. These 2 compounds stimulated increased growth of the M. corti larvae and to some extent an increase in asexual reproduction. |
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Keywords: | tetrathyridia cestode growth reproduction lipids insect juvenile hormone mimic insect molting hormone analog |
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