ISSN:
1437-3262
Keywords:
Key words Scleractinia
;
Fibre growth patterns
;
Mineralizing matrix compositions
;
Centres of calcification
;
Septal development
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract In contrast to the purely crystalline model of the coral fibre, a transversal zonation is made visible within fibres by specific preparations (enzymatic or light acidic etchings). This growth zonation that corresponds to the successive positions of the secretory ectoderm during septal development shows that crystallization of coral fibre is controlled not only by an external organic coating of fibres, but also includes intra-fibrous organic components. This results in a micron-scaled internal structure of fibres, with a noticeable diversity depending on species. In parallel, soluble matrices also exhibit significant differences, although the global high content in acidic amino acids is always observed. Gathering these two sets of data allows the current ideas concerning structures and growth modalities of coral septa to be discussed. Basically, the respective role of centres of calcification and fibres during septal development appears clearly different from the current ideas, resulting in significant change in interpretation of coral structures, with concerns in both skeleton formation and understanding of diagenetic processes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s005310050286
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