Abstract
The egg cortical reaction in Limulus polyphemus is described in four events. Approximately 10 min after insemination, small “pits” are visible in the cortex of the inseminated Limulus egg. These pits progressively enlarge, eventually coalesce, and finally disappear, leaving a smooth-appearing surface approximately 60–90 min after insemination. Based on these visible changes, the following four events comprise the cortical reaction: (I) uninseminated egg—smooth surface, (II) inseminated egg—appearance and growth of pits, (III) inseminated egg—coalescence of pits, and (IV) inseminated egg—appearance of smooth surface. Preparation of these events for SEM studies demonstrated morphological characteristics and sequential development of the pits. Also numerous microvilli are found on the surface of uninseminated and inseminated eggs during the cortical reaction. An increase in their diameter during the reaction is particularly unique.
Published Version
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