Prokaryotic Aminopeptidase Activity along a Continuous Salinity Gradient in a Hypersaline Coastal Lagoon (the Coorong, South Australia)

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dc.contributor.author Pollet, Thomas en_US
dc.contributor.author Schapira, Mathilde en_US
dc.contributor.author Buscot, Marie-Jeanne en_US
dc.contributor.author Leterme, Sophie C en_US
dc.contributor.author Mitchell, James G en_US
dc.contributor.author Seuront, Laurent en_US
dc.date.accessioned 2012-01-11T23:21:00Z
dc.date.available 2012-01-11T23:21:00Z
dc.date.copyright 2010 en_US
dc.date.issued 2010-4-30 en_US
dc.identifier.citation Pollet, Thomas, Mathilde Schapira, Marie-Jeanne Buscot, Sophie C Leterme, James G Mitchell, Laurent Seuront. "Prokaryotic aminopeptidase activity along a continuous salinity gradient in a hypersaline coastal lagoon (the Coorong, South Australia)" Saline Systems 6:5. (2010) en_US
dc.identifier.issn 1746-1448 en_US
dc.identifier.uri http://hdl.handle.net/2144/3344
dc.description.abstract The distribution and aminopeptidase activity of prokaryotes were investigated along a natural continuous salinity gradient in a hypersaline coastal lagoon, the Coorong, South Australia. The abundance of prokaryotes significantly increased from brackish to hypersaline waters and different sub-populations, defined by flow cytometry, were observed along the salinity gradient. While four sub-populations were found at each station, three additional ones were observed for 8.3% and 13.4%, suggesting a potential modification in the composition of the prokaryotic communities and/or a variation of their activity level along the salinity gradient. The aminopeptidase activity highly increased along the gradient and salinity appeared as the main factor favouring this enzymatic activity. However, while the aminopeptidase activity was dominated by free enzymes for salinities ranging from 2.6% to 13.4%, cell-attached aminopeptidase activity was predominant in more saline waters (i.e. 15.4%). Changes in substrate structure and availability, strongly related to salinity, might (i) modify patterns of both aminopeptidase activities (free and cell-associated enzymes) and (ii) obligate the prokaryotic communities to modulate rapidly their aminopeptidase activity according to the nutritive conditions available along the gradient. en_US
dc.description.sponsorship Australian Research Council (DP0664681, DP0666420, DP0988554); Flinders University en_US
dc.language.iso en en_US
dc.publisher BioMed Central en_US
dc.rights Copyright 2010 Pollet et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. en_US
dc.rights.uri http://creativecommons.org/licenses/by/2.0 en_US
dc.title Prokaryotic Aminopeptidase Activity along a Continuous Salinity Gradient in a Hypersaline Coastal Lagoon (the Coorong, South Australia) en_US
dc.type article en_US
dc.identifier.doi 10.1186/1746-1448-6-5 en_US
dc.identifier.pubmedid 20433731 en_US
dc.identifier.pmcid 2882902 en_US

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