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Free Content Spicule formation in the gorgonian coral Pseudoplexaura flagellosa. 2: Calcium localization by antimona te precipitation

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Abstract:

Experimentally induced deposits of calcium pyroantimonate are prominently associated with the extracellular space, epithelial microvilli and plasma membranes in the tissues of the gorgonian Pseudoplexaura flagellosa. Three types of cells are associated with internal deposits of antimonate: zooxanthellae, nematocytes and sclerocytes. Label in zooxanthellae is associated with the formation of oxalate crystals characteristic of aging cells. Precipitate in nematocytes is confined primarily to the nucleus and cytoplasm and is largely excluded from the nematocyst capsule, perhaps representing a translocation artifact. Of the two types of sclerocytes in this species, only the primary sc1erocytes are labelled internally, particularly within electron lucent vesicles and their membranes. Additional spicule growth is extracellular, and is associated with the pseudopodia of secondary sclerocytes. Antimonate precipitates confirm this pattern.

Document Type: Research Article

Publication date: 1987-03-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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