Abnormal periostracum secretion during the mineralization process of the pearl in the blacklip pearl oyster Pinctada margaritifera |
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| Institution: | 1. School of Basic Courses of Guangdong Pharmaceutical University, Guangzhou 510006, China;2. State Key Laboratory Breeding Base of Marine Genetic Resources, Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;3. Institute for Integrative Genomic Biology, University of California, Riverside, CA 92521, USA;1. Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, 515063, China;2. Marine Biology Institute, Shantou University, Shantou, 515063, China |
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| Abstract: | Whitish parasite-like bodies (PLBs), 0.5–2 μm in size, were detected within the pearl bag of some grafted pearl oysters, Pinctada margaritifera, from Takapoto island (French Polynesia). Histological and ultrastructural investigations have revealed that these bodies consisted of lamellar organic material locally secreted by some epithelial cells of the pearl bag. The fine structure and the formation of these bodies are described. The causes of this abnormal secretion of organic mater, which actually corresponds to periostracum, are not presently known. No parasite nor infectious micro-organism was found associated with the PLBs. |
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