| Chemosensory response of marine flagellate towards L- and D- dissolved free amino acids generated during heavy grazing on bacteria. | |
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MedLine Citation:
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PMID: 20890849 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated the generation of dissolved free amino acids (DFAA) by the bacterivorous flagellate Rhynchomonas nasuta when feeding on abundant prey. Specifically, it examined whether this flagellate protist exhibits a chemosensory response towards those amino acids. The concentrations of glycine and the L- and D-enantiomers of glutamate, serine, threonine, alanine, and leucine were determined in co-cultures of the flagellate and bacteria. Glycine, L- and D-alanine, and L-serine were found to accumulate under these conditions in amounts that correlated positively with flagellate abundance, suggesting that protists are involved in their generation. Investigations of the chemotactic response of young and old foraging protists to the same amino acids, offered in concentrations similar to those previously generated, showed that glycine elicited the strongest attraction in both age groups. Young protists were strongly attracted to all the assayed amino acids, whereas older protists maintained a high level of attraction only for glycine. These results suggest that glycine generated by protists actively grazing in bacterially enriched patches functions as an infochemical, signaling to foraging protists the presence of available prey in the aquatic environment. |
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Authors:
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Begoña Ayo; Aitziber Txakartegi; Zuriñe Baña; Itxaso Artolozaga; Juan Iriberri |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International microbiology : the official journal of the Spanish Society for Microbiology Volume: 13 ISSN: 1618-1905 ISO Abbreviation: Int. Microbiol. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-10-04 Completed Date: 2011-01-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9816585 Medline TA: Int Microbiol Country: Spain |
Other Details:
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Languages: eng Pagination: 151-8 Citation Subset: IM |
Affiliation:
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Department of Immunology, Microbiology and Parasitology, Faculty of Science and Technology, University of the Basque Country, Bilbao, Spain. begona.ayo@ehu.es |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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metabolism* Bacteria / growth & development Chemotaxis* Kinetoplastida / growth & development, metabolism, physiology* |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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