| Sterol composition of freshwater algivorous ciliates does not resemble dietary composition. | |
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MedLine Citation:
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PMID: 17186159 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Algivorous ciliates represent an important link in freshwater food webs, as they transfer energy and biochemical matter from their algal prey to mesozooplankton predators. However, it is still unknown how dietary composition influences the biochemical composition of ciliates. We analyzed the sterol composition of the algivorous ciliates Balanion planctonicum and Urotricha farcta and compared it to the sterol composition of their diet--the cryptomonad Cryptomonas phaseolus. The sterol composition of the ciliates did not resemble that of their algal diet. Ergosterol [(22E)-ergosta-5,7,22-trien-3beta-ol] was the sterol in highest concentration in C. phaseolus, whereas stigmasterol [(24S)-24-ethylcholesta-5,22E-dien-3beta-ol] was dominant in both B. planctonicum and U. farcta. Moreover, the occasionally higher sterol concentrations in the ciliates than in their algal diet suggest sterol accumulation by the ciliates. We conclude that dietary sterol composition influences the composition of the two algivorous ciliates studied, but species-specific differences in metabolism probably determine the ultimate sterol composition of the ciliates. |
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Authors:
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I G Boëchat; A Krüger; R Adrian |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-12-22 |
Journal Detail:
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Title: Microbial ecology Volume: 53 ISSN: 0095-3628 ISO Abbreviation: Microb. Ecol. Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2007-01-31 Completed Date: 2007-04-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7500663 Medline TA: Microb Ecol Country: United States |
Other Details:
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Languages: eng Pagination: 74-81 Citation Subset: IM |
Affiliation:
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Leibniz-Institut für Gewässerökologie und Binnenfischerei, Müggelseedamm 301, D-12587, Berlin, Germany. iboechat@gmx.net |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Ciliophora / chemistry*, classification, physiology Cryptophyta / chemistry* Culture Media Ergosterol / analysis, metabolism Food Chain* Fresh Water / parasitology* Species Specificity Sterols / analysis*, metabolism Stigmasterol / analysis, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Culture Media; 0/Sterols; 57-87-4/Ergosterol; 83-48-7/Stigmasterol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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