FN Archimer Export Format
PT J
TI Photoacclimation of the polar diatom Chaetoceros neogracilis at low temperature
BT 
AF Lacour, Thomas
   Larivière, Jade
   Ferland, Joannie
   Morin, Philippe-Israël
   Grondin, Pierre-Luc
   Donaher, Natalie
   Cockshutt, Amanda
   Campbell, Douglas A.
   Babin, Marcel
AS 1:1,2,3;2:2,3;3:2,3;4:2,3;5:2,3;6:4;7:4;8:4;9:2,3;
FF 1:PDG-ODE-PHYTOX-PHYSALG;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Ifremer, PHYTOX, PHYSALG, Brest, France
   Département de Biologie, Takuvik International Research Laboratory (IRL-3376, CNRS, France
   ULaval (Canada), Université Laval, Québec, Canada
   Department of Chemistry and Biochemistry, Mount Allison University, Sackville, Canada
C2 IFREMER, FRANCE
   CNRS, FRANCE
   UNIV LAVAL, CANADA
   UNIV MOUNT ALLISON, CANADA
SI NANTES
SE PDG-ODE-PHYTOX-PHYSALG
IN WOS Ifremer UPR
   DOAJ
   copubli-france
   copubli-int-hors-europe
IF 3.7
TC 2
UR https://archimer.ifremer.fr/doc/00794/90563/96135.pdf
   https://archimer.ifremer.fr/doc/00794/90563/96136.docx
   https://archimer.ifremer.fr/doc/00794/90563/96137.docx
   https://archimer.ifremer.fr/doc/00794/90563/96138.docx
   https://archimer.ifremer.fr/doc/00794/90563/96139.docx
   https://archimer.ifremer.fr/doc/00794/90563/96140.docx
   https://archimer.ifremer.fr/doc/00794/90563/96141.docx
   https://archimer.ifremer.fr/doc/00794/90563/96142.docx
   https://archimer.ifremer.fr/doc/00794/90563/96143.docx
   https://archimer.ifremer.fr/doc/00794/90563/96144.docx
   https://archimer.ifremer.fr/doc/00794/90563/96145.docx
LA English
DT Article
AB Polar microalgae face two major challenges: 1- growing at temperatures (-1.7 to 5°C) that limit enzyme kinetics; and 2- surviving and exploiting a wide range of irradiance. The objective of this study is to understand the adaptation of an Arctic diatom to its environment by studying its ability to acclimate to changes in light and temperature. We acclimated the polar diatom Chaetoceros neogracilis to various light levels at two different temperatures and studied its growth and photosynthetic properties using semi-continuous cultures. Rubisco content was high, to compensate for low catalytic rates, but did not change detectably with growth temperature. Contrary to what is observed in temperate species, in C. neogracilis, carbon fixation rate (20 min 14C incorporation) equaled net growth rate (μ) suggesting very low or very rapid (<20 min) re-oxidation of the newly fixed carbon. The comparison of saturation irradiances for electron transport, oxygen net production and carbon fixation revealed alternative electron pathways that could provide energy and reducing power to the cell without consuming organic carbon which is a very limiting product at low temperatures. High protein contents, low re-oxidation of newly fixed carbon and the use of electron pathways alternative to carbon fixation may be important characteristics allowing efficient growth under those extreme environmental conditions. 
PY 2022
PD SEP
SO Plos One
SN 1932-6203
PU Public Library of Science (PLoS)
VL 17
IS 9
UT 000930298200001
DI 10.1371/journal.pone.0272822
ID 90563
ER

EF