AN ULTRASTRUCTURAL AND MICROANALYTICAL STUDY OF METAL-ION CONTENT IN GRANULAR CONCRETIONS OF THE FRESH-WATER MUSSEL HYRIDELLA-DEPRESSA

Citation
Sm. Adams et al., AN ULTRASTRUCTURAL AND MICROANALYTICAL STUDY OF METAL-ION CONTENT IN GRANULAR CONCRETIONS OF THE FRESH-WATER MUSSEL HYRIDELLA-DEPRESSA, Micron, 28(1), 1997, pp. 1-11
Citations number
39
Categorie Soggetti
Microscopy
Journal title
MicronACNP
ISSN journal
09684328
Volume
28
Issue
1
Year of publication
1997
Pages
1 - 11
Database
ISI
SICI code
0968-4328(1997)28:1<1:AUAMSO>2.0.ZU;2-#
Abstract
Intracellular and extracellular granules in the gonad and mantle of th e Australian freshwater mussel Hyridella depressa were examined and an alysed using SERI, TEM and STEM techniques. As is characteristic of fr eshwater mussels, this species has extensive aggregations of granular concretions in the extracellular matrix. Energy Dispersive Spectroscop y (EDS) was used to characterise the metal-ion content of these granul es and three X-ray microanalytical techniques were investigated to det ermine the most efficient method of analysis. The granule types were f ound to differ in their metal-ion composition and concentration, size and degree of annulation with the most abundant granule type having a high calcium phosphate content. Secondary Ion Mass Spectroscopy (SIMS) was also investigated as a comparative technique to characterise the metal-ion profile of these granules, but was found to have limitations in imaging and resolution. The potential for using granular concretio ns in H. Depressa as a method for detecting aquatic toxicants was esta blished. (C) 1997 Elsevier Science Ltd.