The formation and growth of the prismatic layer ofPinctada radiata

Nakahara, Hiroyuki; Bevelander, Gerrit

doi:10.1007/bf02062591

Cited by 81 publications

(47 citation statements)

References 12 publications

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“…The pearls consist mostly of aragonite with minor proportions of vaterite (see below), but no calcite. Bivalves do not mineralize their shells directly from the ambient water mass, but in a fluid-filled space between the epithelial tissue of the mantle lobe and the innermost shell surface (the extrapallial space; Nakahara and Bevelander, 1971). The outer epithelial cells of the mantle lobe that lines the inner shell surface (Fig.…”

Section: Samples and Techniques Of Pearl Culturingmentioning

confidence: 99%

Nanostructure, composition and mechanisms of bivalve shell growth

Jacob

Soldati

Wirth

et al. 2008

Geochimica et Cosmochimica Acta

144

109

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Section: Samples and Techniques Of Pearl Culturingmentioning

confidence: 99%

Nanostructure, composition and mechanisms of bivalve shell growth

Jacob

Soldati

Wirth

et al. 2008

Geochimica et Cosmochimica Acta

144

109

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“…The aragonite layer is crossed-lamellar. Crossed-lamellar is undoubtedly the microstructure most commonly found in both gastropods and bivalves shells (Bøggild, 1930;Taylor et al, 1969), although many studies on biocrystallization mechanisms have been focused on taxa presenting nacreous and/or prismatic layers (Travis, 1968;Nakahara and Bevelander, 1971;Nudelman et al, 2006;Dauphin et al, 2008). It presents a complex three dimensional architecture, composed of interlaced units at several distinct orders of magnitude.…”

Section: Specimen Nerita Undatamentioning

confidence: 99%

Confocal Raman microscope mapping as a tool to describe different mineral and organic phases at high spatial resolution within marine biogenic carbonates: case study on <i>Nerita undata</i> (Gastropoda, Neritopsina)

Nehrke

Nouet

2011

Biogeosciences

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Abstract. Marine biogenic carbonates formed by invertebrates (e.g. corals and mollusks) represent complex composites of one or more mineral phases and organic molecules. This complexity ranges from the macroscopic structures observed with the naked eye down to sub micrometric structures only revealed by micro analytical techniques. Understanding to what extent and how organisms can control the formation of these structures requires that the mineral and organic phases can be identified and their spatial distribution related. Here we demonstrate the capability of confocal Raman microscopy applied to cross sections of a shell of Nerita undata to describe the distribution of calcite and aragonite including their crystallographic orientation with high lateral resolution (∼300 nm). Moreover, spatial distribution of functional groups of organic compounds can be simultaneously acquired, allowing to specifically relate them to the observed microstructures. The data presented in this case study highlights the possible new contributions of this method to the description of modalities of Nerita undata shell formation, and what could be expected of its application to other marine biogenic carbonates. Localization of areas of interest would also allow further investigations using more localized methods, such as TEM that would provide complementary information on the relation between organic molecules and crystal lattice.

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“…The mantle cells of the pearl oyster Pinctada radiata are in close proximity with the forming mineral prisms and the organic membranes [32]; that is, the extrapallial space thickness is nanometric. Let us perform some order-of-magnitude calculations to see how long it would take calcium and carbonate to diffuse across the extrapallial space, on the one hand, compared to how long it would take an initial homogeneous mixture of two immiscible phases to self-organize into structures of prism size, on the other.…”

Section: Resultsmentioning

confidence: 99%

“…Another possibility is that crystals and membranes are formed by direct deposition from the mantle cells. Given the relative sizes of prisms (tens of micrometres), membranes (1-3 mm) and mantle cells (5-10 mm) [32], every mantle cell must be secreting both organic and inorganic materials, rspb.royalsocietypublishing.org Proc. R. Soc.…”

Section: Resultsmentioning

confidence: 99%

Organic membranes determine the pattern of the columnar prismatic layer of mollusc shells

et al. 2016

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The degree to which biological control is exercised compared to physical control of the organization of biogenic materials is a central theme in biomineralization. We show that the outlines of biogenic calcite domains with organic membranes are always of simple geometries, while without they are much more complex. Moreover, the mineral prisms enclosed within the organic membranes are frequently polycrystalline. In the prismatic layer of the mollusc shell, organic membranes display a dynamics in accordance with the von Neumann-Mullins and Lewis Laws for two-dimensional foam, emulsion and grain growth. Taken together with the facts that we found instances in which the crystals do not obey such laws, and that the same organic membrane pattern can be found even without the mineral infilling, our work indicates that it is the membranes, not the mineral prisms, that control the pattern, and the mineral enclosed within the organic membranes passively adjusts to the dynamics dictated by the latter.

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The formation and growth of the prismatic layer ofPinctada radiata

Cited by 81 publications

References 12 publications

Nanostructure, composition and mechanisms of bivalve shell growth

Nanostructure, composition and mechanisms of bivalve shell growth

Confocal Raman microscope mapping as a tool to describe different mineral and organic phases at high spatial resolution within marine biogenic carbonates: case study on <i>Nerita undata</i> (Gastropoda, Neritopsina)

Organic membranes determine the pattern of the columnar prismatic layer of mollusc shells

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The formation and growth of the prismatic layer ofPinctada radiata

Cited by 81 publications

References 12 publications

Nanostructure, composition and mechanisms of bivalve shell growth

Nanostructure, composition and mechanisms of bivalve shell growth

Confocal Raman microscope mapping as a tool to describe different mineral and organic phases at high spatial resolution within marine biogenic carbonates: case study on &lt;i&gt;Nerita undata&lt;/i&gt; (Gastropoda, Neritopsina)

Organic membranes determine the pattern of the columnar prismatic layer of mollusc shells

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Confocal Raman microscope mapping as a tool to describe different mineral and organic phases at high spatial resolution within marine biogenic carbonates: case study on <i>Nerita undata</i> (Gastropoda, Neritopsina)