Electron and ion microprobe analysis of calcium distribution and transport in coral tissues

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dc.contributor.authorMarshall, ATen_AU
dc.contributor.authorClode, PLen_AU
dc.contributor.authorRussell, RAen_AU
dc.contributor.authorPrince, KEen_AU
dc.contributor.authorStern, Ren_AU
dc.date.accessioned2009-11-11T04:42:10Zen_AU
dc.date.accessioned2010-04-30T05:02:17Zen_AU
dc.date.available2009-11-11T04:42:10Zen_AU
dc.date.available2010-04-30T05:02:17Zen_AU
dc.date.issued2007-07-15en_AU
dc.date.statistics2007-07-15en_AU
dc.description.abstractIt is shown by x-ray microanalysis that a gradient of total intracellular Ca concentration exists from the outer oral ectoderm to the inner skeletogenic calicoblastic ectoderm in the coral Galaxea fascicularis. This suggests an increase in intracellular Ca stores in relation to calcification. Furthermore, Ca concentration in the fluid-filled space of the extrathecal coelenteron is approximately twice as high as in the surrounding seawater and higher than in the mucus-containing seawater layer on the exterior of the oral ectoderm. This is indicative of active Ca2+ transport across the oral epithelium. Polyps were incubated in artificial seawater in which all 40Ca was replaced by 44Ca. Imaging Ca2+ transport across the epithelia by secondary ion mass spectroscopy (SIMS) using 44Ca as a tracer showed that Ca2+ rapidly entered the cells of the oral epithelium and that 44Ca reached higher concentrations in the mesogloea and extrathecal coelenteron than in the external seawater layer. Very little Ca2+ was exchanged in the mucocytes, cnidocytes or zooxanthellae. These observations again suggest that Ca2+ transport is active and transcellular and also indicate a hitherto unsuspected role in Ca2+ transport for the mesogloea. © 2007, Company of Biologistsen_AU
dc.identifier.citationMarshall, A. T., Clode, P. L., Russell, R., Prince, K., & Stern, R. (2007). Electron and ion microprobe analysis of calcium distribution and transport in coral tissues. Journal of Experimental Biology, 210(14), 2453-2463. doi:10.1242/jeb.003343en_AU
dc.identifier.govdoc1140en_AU
dc.identifier.issn0022-0949en_AU
dc.identifier.issue14en_AU
dc.identifier.journaltitleJournal of Experimental Biologyen_AU
dc.identifier.pagination2453-2463en_AU
dc.identifier.urihttp://dx.doi.org/10.1242/jeb.003343en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2273en_AU
dc.identifier.volume210en_AU
dc.language.isoenen_AU
dc.publisherCompany of Biologistsen_AU
dc.subjectCalciumen_AU
dc.subjectCoralsen_AU
dc.subjectIon microprobe analysisen_AU
dc.subjectMass spectroscopyen_AU
dc.subjectTransporten_AU
dc.subjectDistributionen_AU
dc.titleElectron and ion microprobe analysis of calcium distribution and transport in coral tissuesen_AU
dc.typeJournal Articleen_AU
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