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American Zoologist 1966 6(1):75-87; doi:10.1093/icb/6.1.75
© 1966 by The Society for Integrative and Comparative Biology
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Immunobiological Studies of the Jelly-Coats of Anuran Eggs

JOHN R. SHAVER
Department of Zoology Zoology, Michigan Stale University

A review of some recent experiments in the imrhunobiology of fertilization in frogs is given, with especial emphasis on the role of the jelly-coats of eggs in the initiation of sperm-egg interactions. Data on physical/chemical and antigenic properties of egg-jellies are summarized. Experiments analyzing'the nature of the interaction between sperm and egg-jellies are described. The effects of antibodies against materials of the jelly coat on fertilizability of eggs are presented, as well as an analysis on double-diffusion plates of tissue- and species-specificity of the jelly components. The localization of regional differences between the secretions of different levels of the frog oviduct by means of immunodiffusion patterns, fluorescent-antibody staining and certain histochernical reactions for mucopolysaccharides, is reviewed. A model scheme suggesting the possible operation of various types of jelly antigens in the fertilization process is presented as a working hypothesis for further experimentation. Certain surgical manipulations whereby eggs may be transferred between females of the same or different species are described, and the results of some preliminary experiments made possible by these techniques are evaluated. The role of species-specific and shared jelly antigens in the origin of reproductive isolation among anuran amphibians is discussed.


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