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Developmental Biology of Marine Organisms

Published online by Cambridge University Press:  11 May 2009

C. Brownlee
C. Brownlee
Affiliation:
Marine Biological Association
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In contrast to the situation found in the bivalves Barnea Candida and Spisula solidissima prophase arrested oocytes of Ruditapes philippinarum cannot be fertilized when extracted from the ovary. They must first undergo germinal vesicle breakdown (GVBD) under the influence of the neurohormone serotonin (5-HT) which drives them to a second block occurring in metaphase of the first maturation division. We used Fluo-3 to investigate the possibility that calcium was involved as a second messenger in controlling this first step in meiosis reinitiation. Our data showed that, in addition to 5-HT, ionophore, thapsigargin and the weak bases ammonia and procaine could induce prophase-arrested oocytes of Ruditapes to resume meiosis.

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Abstract
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 73 , Issue 3 , August 1993 , pp. 703 - 718
Copyright
Copyright © Marine Biological Association of the United Kingdom 1993