FN Archimer Export Format
PT J
TI Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
BT 
AF Rontani, Jean-François
   Amiraux, Rémi
   Smik, Lukas
   Wakeham Stuart, G.
   Paulmier, Aurélien
   Vaultier, Frédéric
   HA, Sun-Yong
   MIN, Jun-oh
   Belt Simon, T.
AS 1:1;2:1,2,3;3:4;4:5;5:6;6:1;7:7;8:7,8;9:4;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Aix Marseille Université, Université de Toulon, CNRS/INSU/IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 13288 Marseille, France
   Takuvik Joint International Laboratory, Laval University (Canada) - CNRS, Département de biologie, Université Laval, Québec G1V 0A6, Québec, Canada
   UMR 6539 Laboratoire des Sciences de l’Environnement Marin (CNRS, UBO, IRD, Ifremer) Institut Universitaire Européen de la Mer (IUEM) Plouzané, France
   Biogeochemistry Research Centre, School of Geography, Earth and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK
   Skidaway Institute of Oceanography, Savannah, Georgia, USA
   Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS), IRD/CNRS/UPS/CNES, Université de Toulouse, 31401 Toulouse Cedex, 9, France
   Division of Ocean Sciences, Korea Polar Research Institute, 26 Songdomirae-ro, Incheon, 21990, Republic of Korea
   Department of Marine Science and Convergence Technology, Hanyang University, 55 Hanyangdaehak-ro, Ansan, 15588, Republic of Korea
C2 UNIV AIX MARSEILLE, FRANCE
   UNIV LAVAL, CANADA
   UBO, FRANCE
   UNIV PLYMOUTH, UK
   SKIDAWAY INST OCEANOG, USA
   UNIV TOULOUSE, FRANCE
   KOPRI, SOUTH KOREA
   UNIV HANYANG, SOUTH KOREA
UM LEMAR
IN WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 10.754
TC 6
UR https://archimer.ifremer.fr/doc/00685/79659/82423.pdf
LA English
DT Article
CR AMOP
BO L'Atalante
DE ;Photodynamic effect;Senescent phytoplankton;Latitude;Polar regions;Solar irradiance
AB Comparison of Type II photosensitized oxidation of lipids (the photodynamic effect) and photodegradation of chlorophyll (sensitizer photobleaching) in samples of particulate matter collected previously from locations representing a diverse range of latitudes reveals an enhancement of the photooxidation of lipids at the expense of chlorophyll photodegradation in the polar regions. The efficiency of the photodynamic effect appears to be particularly high in sinking particles collected under sea ice and is attributed to the rapid settling of highly aggregated sympagic algae to depths of low light transmission favouring the photodynamic effect at the expense of photobleaching of the sensitizer. Paradoxically, the low efficiency of Type II photosensitized oxidation of lipids observed in temperate and equatorial regions is associated with high solar irradiances in these regions. Type II photosensitized oxidation of lipids in senescent phytoplankton seems thus to be strongly dependent of the intensity of solar irradiance. 
PY 2021
PD JUN
SO Science Of The Total Environment
SN 0048-9697
PU Elsevier BV
VL 779
UT 000655683800004
DI 10.1016/j.scitotenv.2021.146363
ID 79659
ER

EF