FN Archimer Export Format
PT J
TI Cultivation of an immobilized (hyper)thermophilic marine microbial community in a bioreactor
BT 
AF LANDREAU, M.
   DUTHOIT, Frederique
   ROUSSEL, Erwan
   SCHONHERR, S.
   GEORGES, Myriam
   GODFROY, Anne
   LE BLAY, G.
AS 1:1,2,3;2:1,2,3;3:1,2,3;4:1,2,3;5:1,2,3;6:1,2,3;7:1,2,3;
FF 1:;2:;3:PDG-REM-EEP-LMEE;4:;5:;6:PDG-REM-EEP-LMEE;7:;
C1 Univ Bretagne Occidentale, LMEE, UEB, IUEM,UMR 6197, Technopole Brest Iroise,Pl Nicolas Copernic, F-29280 Plouzane, France.
   CNRS, IUEM, LMEE, UMR 6197, Pl Nicolas Copernic, F-29280 Plouzane, France.
   IFREMER, LMEE, UMR 6197, Technopole Pointe Diable, F-29280 Plouzane, France.
C2 UBO, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-EEP-LMEE
UM BEEP-LM2E
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.765
TC 3
UR https://archimer.ifremer.fr/doc/00347/45851/45516.pdf
LA English
DT Article
DE ;immobilization;anaerobiosis;marine (hyper)thermophiles;continuous culture
AB Cultivation in a bioreactor of immobilized deep-sea hydrothermal microbial community was tested in order to assess the stability and reactivity of this new system. A community composed of 8 hydrothermal strains was entrapped in a polymer matrix that was used to inoculate a continuous culture in a gas-lift bioreactor. The continuous culture was performed for 41 days at successively 60°C, 55°C, 60°C, 85°C and 60°C, at pH 6.5, in anaerobic condition and constant dilution rate. Oxic stress and pH variations were tested at the beginning of the incubation. Despite these detrimental conditions, 3 strains including 2 strict anaerobes were maintained in the bioreactor. High cell concentrations (3 × 108 cells mL−1) and high ATP contents were measured in both liquid fractions and beads. Cloning-sequencing and qPCR revealed that Bacillus sp. dominated at the early stage, and was later replaced by Thermotoga maritima and Thermococcus sp.. Acetate, formate and propionate concentrations varied simultaneously in the liquid fractions. These results demonstrate that these immobilized cells were reactive to culture conditions. They were protected inside the beads during the stress period and released in the liquid fraction when conditions were more favorable. This confirms the advantage of immobilization that highlight the resilience capacity of certain hydrothermal microorganisms after a stress period.
PY 2016
PD SEP
SO Fems Microbiology Letters
SN 0378-1097
PU Oxford Univ Press
VL 363
IS 17
UT 000388377700014
DI 10.1093/femsle/fnw194
ID 45851
ER

EF