FN Archimer Export Format
PT J
TI Prokaryotic aminopeptidase activity along a continuous salinity gradient in a hypersaline coastal lagoon (the Coorong, South Australia)
BT 
AF POLLET, Thoams
   SCHAPIRA, MATHILDE
   BUSCOT, Marie-Jeanne
   LETERME, Sophie
   MITCHELL, James G
   SEURONT, Laurent
AS 1:1,2;2:1,3;3:1;4:1,4;5:1;6:1,4,5,6;
FF 1:;2:;3:;4:;5:;6:;
C1 School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia
   MR CARRTEL, Centre Alpin de Recherche sur les Réseaux Trophiques des Ecosystèmes Limniques, Station d'Hydrobiologie Lacustre, Université de Savoie, 75 avenue de Corzent, BP 511, Thonon les Bains Cedex, 74203, France
   Southern Ocean Group, Dept. of Zoology & Entomology, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa
   South Australian Research and Development Institute, Aquatic Sciences, West Beach, SA, 5022, Australia
   Center for Polymer Studies, Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA
   Centre National de la Recherche Scientifique, France
C2 UNIV FLINDERS, AUSTRALIA
   UNIV SAVOIE, FRANCE
   UNIV RHODES, SOUTH AFRICA
   SARDI, AUSTRALIA
   UNIV BOSTON, USA
   CNRS, FRANCE
TC 0
UR https://archimer.ifremer.fr/doc/00174/28549/26933.pdf
LA English
DT Article
AB he 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.
PY 2010
PD APR
SO Saline Systems
SN 1746-1448
PU BioMed Central Ltd
VL 6
IS 5
BP 1
EP 6
DI 10.1186/1746-1448-6-5
ID 28549
ER

EF