Document Detail

The sterols of calcareous sponges (Calcarea, Porifera).
MedLine Citation:
PMID:  18671957     Owner:  NLM     Status:  MEDLINE    
Sponges are sessile suspension-feeding organisms whose internal phylogenetic relationships are still the subject of intense debate. Sterols may have the potential to be used as independent markers to test phylogenetic hypotheses. Twenty representative specimens of calcareous sponges (class Calcarea, phylum Porifera) with a broad coverage within both subclasses Calcinea and Calcaronea were analysed for their sterol content. Two major pseudohomologous series were found, accompanied by some additional sterols. The first series encompassing conventional C(27) to C(29)Delta(5,7,22) sterols represented the major sterols, with ergosterol (ergosta-5,7,22-trien-3beta-ol, C(28)Delta(5,7,22)) being most prominent in many species. The second series consisted of unusual C(27) to C(29)Delta(5,7,9(11),22) sterols. Cholesterol occurred sporadically, mostly in trace amounts. The sterol patterns did not resolve intraclass phylogenetic relationships, namely the distinction between the subclasses, Calcinea and Calcaronea. This pointed towards major calcarean lipid traits being established prior to the separation of subclasses. Furthermore, calcarean sterol patterns clearly differ from those found in Hexactinellida, whereas partial overlap occurred with some Demospongiae. Hence, sterols only partly reflect the phylogenetic separation of Calcarea from both of the other poriferan classes that was proposed by recent molecular work and fatty acid analyses.
Andrea Hagemann; Oliver Voigt; Gert Wörheide; Volker Thiel
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-07-10
Journal Detail:
Title:  Chemistry and physics of lipids     Volume:  156     ISSN:  1873-2941     ISO Abbreviation:  Chem. Phys. Lipids     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-10     Completed Date:  2009-01-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0067206     Medline TA:  Chem Phys Lipids     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  26-32     Citation Subset:  IM    
Centre for Geoscience, University of Göttingen, Göttingen, Germany.
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MeSH Terms
Ergosterol / analysis,  chemistry
Porifera / chemistry*,  classification
Sterols / analysis,  chemistry*
Reg. No./Substance:
0/Sterols; 57-87-4/Ergosterol

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