Welkom op het expertplatform!
Dit platform verschaft informatie en kennis omtrent de WL expertisedomeinen 'hydraulica en sediment', 'havens en waterwegen', 'waterbouwkundige constructies', 'waterbeheer' en 'kustbescherming' - gaande van WL medewerkers met hun expertise, het curriculum van deze instelling, tot publicaties, projecten, data (op termijn) en evenementen waarin het WL betrokken is.
Het WL onderschrijft het belang van "open access" voor de ontsluiting van haar onderzoeksresultaten. Lees er meer over in ons openaccessbeleid.
Biomineralization in living hypercalcified demosponges: toward a shared mechanism?
Gilis, M.; Grauby, O.; Willenz, P.; Dubois, P.; Heresanu, V.; Baronnet, A. (2013). Biomineralization in living hypercalcified demosponges: toward a shared mechanism? J. Struct. Biol. 183(3): 441-454. dx.doi.org/10.1016/j.jsb.2013.05.018
In: Journal of structural biology. ACADEMIC PRESS INC ELSEVIER SCIENCE: San Diego, Calif.. ISSN 1047-8477; e-ISSN 1095-8657
|  |
| Trefwoorden |
|
| Author keywords |
Hypercalcified sponges; Biomineral; Calcification; Porifera; Calciumcarbonate; Demospongiae |
| Auteurs | | Top |
- Gilis, M.
- Grauby, O.
- Willenz, P.
|
- Dubois, P.
- Heresanu, V.
- Baronnet, A.
|
|
| Abstract |
Massive skeletons of living hypercalcified sponges, representative organisms of basal Metazoa, are uncommon models to improve our knowledge on biomineralization mechanisms and their possible evolution through time. Eight living species belonging to various orders of Demospongiae were selected for a comparative mineralogical characterization of their aragonitic or calcitic massive basal skeleton. The latter was prepared for scanning and transmission electron microscopy (SEM and TEM), selected-area electron diffraction (SAED) and X-ray diffraction (XRD) analyses. SEM results indicated distinctive macro- and micro-structural organizations of the skeleton for each species, likely resulting from a genetically dictated variation in the control exerted on their formation. However, most skeletons investigated shared submicron to nano-scale morphological and crystallographical patterns: (1) single-crystal fibers and bundles were composed of 20 to 100 nm large submicronic grains, the smallest structural units, (2) nano-scale likely organic material occurred both within and between these structural units, (3) {1 1 0} micro-twin planes were observed along aragonitic fibers, and (4) individual fibers or small bundles protruded from the external growing surface of skeletons. This comparative mineralogical study of phylogenetically distant species brings further evidence to recent biomineralization models already proposed for sponges, corals, mollusks, brachiopods and echinoderms and to the hypothesis of the universal and ancestral character of such mechanisms in Metazoa. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
