FN Archimer Export Format PT J TI Continuous selection pressure to improve temperature acclimation of Tisochrysis lutea BT AF BONNEFOND, Hubert GRIMAUD, Ghjuvan RUMIN, Judith BOUGARAN, Gael TALEC, Amelie GACHELIN, Manon BOUTOUTE, Marc PRUVOST, Eric BERNARD, Olivier SCIANDRA, Antoine AS 1:1;2:2;3:3;4:3;5:1;6:1;7:1;8:1;9:2;10:1; FF 1:;2:;3:PDG-RBE-BRM-PBA;4:PDG-RBE-BRM-PBA;5:;6:;7:;8:;9:;10:; C1 UPMC Univ Paris 06, Sorbonne Univ, CNRS, INSU,LOV, Villefranche Sur Mer, France. INRIA, BIOCORE, Sophia Antipolis, France. PBA, IFREMER, Nantes, France. C2 UNIV PARIS 06, FRANCE INRIA, FRANCE IFREMER, FRANCE SI NANTES SE PDG-RBE-BRM-PBA IN WOS Ifremer jusqu'en 2018 DOAJ copubli-france copubli-univ-france IF 2.766 TC 22 UR https://archimer.ifremer.fr/doc/00404/51506/52107.pdf LA English DT Article AB Temperature plays a key role in outdoor industrial cultivation of microalgae. Improving the thermal tolerance of microalgae to both daily and seasonal temperature fluctuations can thus contribute to increase their annual productivity. A long term selection experiment was carried out to increase the thermal niche (temperature range for which the growth is possible) of a neutral lipid overproducing strain of Tisochrysis lutea. The experimental protocol consisted to submit cells to daily variations of temperature for 7 months. The stress intensity, defined as the amplitude of daily temperature variations, was progressively increased along successive selection cycles. Only the amplitude of the temperature variations were increased, the daily average temperature was kept constant along the experiment. This protocol resulted in a thermal niche increase by 3 degrees C (+16.5%), with an enhancement by 9% of the maximal growth rate. The selection process also affected T. lutea physiology, with a feature generally observed for 'cold-temperature' type of adaptation. The amount of total and neutral lipids was significantly increased, and eventually productivity was increased by 34%. This seven month selection experiment, carried out in a highly dynamic environment, challenges some of the hypotheses classically advanced to explain the temperature response of microalgae. PY 2017 PD SEP SO Plos One SN 1932-6203 PU Public Library Science VL 12 IS 9 UT 000410669200013 DI 10.1371/journal.pone.0183547 ID 51506 ER EF