Simon Gwénola auteur aut IRD Walther J. auteur aut IRD Zabeti Nathalie auteur aut IRD Combet-Blanc Yannick auteur aut IRD Auria Richard auteur aut IRD van der Oost J. auteur aut IRD Casalot Laurence auteur aut IRD text journalArticle eng text/pdf born digital access Sulfolobus solfataricus P2 was grown aerobically at various O-2 concentrations. Based on growth parameters in microcosms, four types of behavior could be distinguished. At 35% O-2 (v/v; gas phase), the cultures did not grow, indicating a lethal dose of oxygen. For 26-32% O-2, the growth was significantly affected compared with the reference (21%), suggesting a moderate toxicity by O-2. For 16-24% O-2, standard growth was observed. For 1.5-15% O-2, growth was comparable with the reference, but the yield on O-2 indicated a more efficient use of oxygen. These results indicate that S. solfataricus P2 grows optimally in the range of 1.5-24% O-2, most likely by adjusting its energy-transducing machinery. To gain some insight into control of the respiratory system, transcriptomes of the strain cultivated at different O-2 concentrations, corresponding to each behavior (1.5%, 21% and 26%), were compared using a DNA microarray approach. It showed differential expression of several genes encoding terminal oxidases, indicating an adaptation of the strain's respiratory system in response to fluctuating oxygen concentrations. specialized archaea Sulfolobus solfataricus oxygen physiology regulation of transcription 020 084 299 2 255-260 2009 0378-1097 https://www.documentation.ird.fr/hor/fdi:010048227 10.1111/j.1574-6968.2009.01759.x 0378-1097 [F B010048227] https://www.documentation.ird.fr/hor/fdi:010048227 https://www.documentation.ird.fr/intranet/publi/2009/10/010048227.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-11-09 2017-08-23 fdi:010048227 fre