Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

A chemical view of the most ancient metazoa – biomarker chemotaxonomy of hexactinellid sponges

A chemical view of the most ancient metazoa – biomarker chemotaxonomy of hexactinellid sponges Hexactinellid sponges are often considered to be the most ancient metazoans. Lipid biomarkers from 23 species were studied for information on their phylogenetic properties, particularly their disputed relation to the two other sponge classes (Demospongiae, Calcarea). The most prominent lipid compounds in the Hexactinellida comprise C28 to C32 polyenoic fatty acids. Their structures parallel the unique patterns found in demosponge membrane fatty acids ('demospongic acids') and strongly support a close phylogenetic association of the Demospongiae and the Hexactinellida. Both taxa also show unusual mid-chain methylated fatty acids (C15–C25) and irregular C25- and C40-isoprenoid hydrocarbons, tracers for specific eubacteria and Archaea, respectively. These biomarkers indicate a similar, highly conservative symbiont community, although some shift in the abundance of the associated microbiota was observed. The lack of these features in calcareous sponges further contradicts the still common view that Calcarea and Demospongiae are more closely related to each other than either is to the Hexactinellida. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Naturwissenschaften Springer Journals

A chemical view of the most ancient metazoa – biomarker chemotaxonomy of hexactinellid sponges

Loading next page...
 
/lp/springer-journals/a-chemical-view-of-the-most-ancient-metazoa-biomarker-chemotaxonomy-of-tscC38WdSs

References (29)

Publisher
Springer Journals
Copyright
Copyright © 2002 by Springer-Verlag
Subject
Life Sciences; Life Sciences, general; Environment, general
ISSN
0028-1042
eISSN
1432-1904
DOI
10.1007/s00114-001-0284-9
Publisher site
See Article on Publisher Site

Abstract

Hexactinellid sponges are often considered to be the most ancient metazoans. Lipid biomarkers from 23 species were studied for information on their phylogenetic properties, particularly their disputed relation to the two other sponge classes (Demospongiae, Calcarea). The most prominent lipid compounds in the Hexactinellida comprise C28 to C32 polyenoic fatty acids. Their structures parallel the unique patterns found in demosponge membrane fatty acids ('demospongic acids') and strongly support a close phylogenetic association of the Demospongiae and the Hexactinellida. Both taxa also show unusual mid-chain methylated fatty acids (C15–C25) and irregular C25- and C40-isoprenoid hydrocarbons, tracers for specific eubacteria and Archaea, respectively. These biomarkers indicate a similar, highly conservative symbiont community, although some shift in the abundance of the associated microbiota was observed. The lack of these features in calcareous sponges further contradicts the still common view that Calcarea and Demospongiae are more closely related to each other than either is to the Hexactinellida.

Journal

NaturwissenschaftenSpringer Journals

Published: Jan 10, 2002

There are no references for this article.