First characterization report of natural pearl of Pinctada fucata from Gulf of Mannar
C.P. Suja, S. Lakshmana Senthil, Bridget Jeyatha, Jensi Ponmalar, Koncies Mary
Abstract
The present study is aimed to characterize the natural pearl of Pinctada fucata from Gulf of Mannar by Scanning Electron Microscope (SEM) and Energy Dispersive Studies (EDS). Pearl oysters (P. fucata) from Kayalpattinam, Gulf of Mannar, were landed as a by-catch in the bottom set gill net at a depth of 4 m and collected for tissue culture studies. During mantle tissue dissection, a good lustrous, round pearl of 1.5 mm size was found in the mantle fold of pearl oyster P. fucata. This evidenced the existence of natural pearl oyster beds and natural pearls in this region. It was analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) to find out the composition of nacre. Parallel orientation of crystals to form the lamellar formation of nacre is clearly visible in SEM. Pseudo-hexagonal aragonite crystals arranged in a uniform layer and joined together to form a lamella with inter-lamellar matrix. Two forms of calcium (CaO and CaCO3) obtained in EDS analysis. Calcium content in the natural pearl is 66.05% which is clearly reveals the aragonite form. Niobium (Nb) was attained at 6% in natural pearl which is the first report in its kind and it may also play a role in the formation of lustrous layer. There are so many characterization reports available about mother of pearl in shell of different species, but this is the first report of natural pearl from P. fucata.
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References
Addadi et al., 2006
L. Addadi, D. Joester, F. Nudelman, S. Weiner
Mollusk shell formation: A source of new concepts for understanding biomineralization processes
Chemistry – A European Journal, 12 (2006), pp. 980-987
Belcher et al., 1996
A.M. Belcher, X.H. Wu, R.J. Christensen, P.K. Hansma, G.D. Stucky, D.E. Morse
Control of crystal phase switching and orientation by soluble mollusc-shell proteins
Nature, 381 (1996), pp. 56-58
Bouchet, 2013
P. Bouchet
Pinctada fucata (Gould 1850), world register of marine species
(2013)
15.02.14
Checca et al., 2006
A.G. Checca, T. Okamoto, J. Ramirez
Organization pattern of nacre in Pteridae (Bivalvia: Mollusca) explained by crystal competition
Proceedings of the Royal Society B, 273 (2006), pp. 1329-1337
Checa and Rodriguez-Navarro, 2005
A.G. Checa, A.B. Rodriguez-Navarro
Self-organization of nacre in the shells of Pterioida (Bivalvia: Mollusca)
Biomaterials, 26 (2005), pp. 1071-1079
FAO, 2014
FAO
Pearl culture in India: Taxonomy and distribution, pearl oyster farming and pearl culture
(2014)
15.02.14
Gupta and Suri, 1994
C.K. Gupta, A.K. Suri
Extractive metallurgy of niobium
CRC Press (1994), pp. 1-16
John Daintith, 2008
A. John Daintith
Dictionary of chemistry
Oxford University Press (2008)
Liu et al., 2012
X. Liu, J. Li, L. Xiang, J. Sun, G. Zheng, G. Zhang, et al.
The role of matrix proteins in the control of nacreous layer deposition during pearl formation
Proceedings of the Royal Society B: Biological Sciences, 279 (2012), pp. 1000-1007
Miyazaki et al., 2010
Y. Miyazaki, T. Nishida, H. Aoki, T. Samata
Expression of genes responsible for biomineralization of Pinctada fucata during development
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 155 (2010), pp. 241-248
Wada, 1961
K. Wada
Crystal growth of molluscan shells
Bulletin of the National Pearl Research Laboratory, 7 (1961), pp. 703-828
Watabe, 1952
N. Watabe
Relation between water temperature and nacre-secreting activity of pearl-oyster Pinctada martensii
Journal of Fuji Pearl Institute, 2 (1952), pp. 21-26
Xiang et al., 2014
L. Xiang, W. Kong, J. Su, J. Liang, G. Zhang, L. Xie, et al.
Amorphous calcium carbonate precipitation by cellular biomineralization in mantle cell cultures of P. fucata
PLOS ONE, 9 (11) (2014), p. e113150
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