Philippe Constant
Associate Professor,INRS-Institut Armand-Frappier
E-mail: philippe.constant@iaf.inrs.ca
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ResearchOur research group is interested in the biogeochemical cycle of the trace gases that are either directly or indirectly constraining the Earth’s energy balance. The objective of our research includes the identification of the microorganisms controlling atmospheric trace gas budgets and the analysis of the impact of global change on microbial biogeochemistry. Microorganisms demonstrating the ability to oxidize atmospheric trace gases have evolved unusual metabolic pathways involving enzymes displaying high substrate affinity. In some bacteria, the scavenging of atmospheric trace gases provides an alternative energy source supplying maintenance energy requirements or secondary metabolites synthesis. An assessment of the potential biotechnological applications of these microorganisms is also part of the research agenda of our team. The research is organized to shed light on these questions of fundamental interest:
QCBS students Thibault BOURDINPh.D.  Anne de la PortePh.D.  Nejia LassouedPh.D.  Judith MogouongPh.D.  Josiann Normandeau-GuimondM.Sc. Previous students (since 2009) Sarah Piché-ChoquettePh.D.  Asma JabaM.Sc. Relevant QCBS research themesExamples of species studiedDendroctonus simplex Streptomycetes Publications38- Physiological traits and relative abundance of species as explanatory variables of co-occurrence pattern of cultivable bacteria associated with chia seeds Jaba A , Dagher F , Hamidi Oskouei A M , Guertin C , Constant P , 2019 Canadian Journal of Microbiology (Date Added: 2019-09-17) 37- Identification of factors affecting bacterial abundance and community structures in a full-scale chlorinated drinking water distribution system Dias V , Durand A , Constant P , Prévost M , Bédard E , 2019 Water (Switzerland) (Date Added: 2019-05-13) 36- Molecular Hydrogen, a Neglected Key Driver of Soil Biogeochemical Processes Piché-Choquette S , Constant P , 2019 Applied and environmental microbiology (Date Added: 2019-03-24) 35- The symbiotic complex of Dendroctonus simplex: Implications in the beetle attack and its life cycle Durand A , Constant P , Déziel E , Guertin C , 2019 Bulletin of Entomological Research (Date Added: 2019-03-08) 34- Soil bacterial community associated with high potato production and minimal water use Gumiere T , Gumiere S J , Matteau J , Constant P , Létourneau G , Rousseau A N , 2019 Frontiers in Environmental Science (Date Added: 2019-01-29) 33- Water stress history and wheat genotype modulate rhizosphere microbial response to drought Azarbad H , Constant P , Giard-Laliberté C , Bainard L D , Yergeau E , 2018 Soil Biology and Biochemistry (Date Added: 2018-10-22) 32- Meta-omics survey of [NiFe]-hydrogenase genes fails to capture drastic variations in H Khdhiri M , Piché-Choquette S , Tremblay J , Tringe S G , Constant P , 2018 Soil Biology and Biochemistry (Date Added: 2018-08-05) 31- Dose-response relationships between environmentally-relevant H Piché-Choquette S , Khdhiri M , Constant P , 2018 Soil Biology and Biochemistry (Date Added: 2018-05-28) 30- Strain-level genetic diversity of Methylophaga nitratireducenticrescens confers plasticity to denitrification capacity in a methylotrophic marine denitrifying biofilm Geoffroy V , Payette G , Mauffrey F , Lestin L , Constant P , Villemur R , 2018 PeerJ (Date Added: 2018-05-02) 29- Denitrifying metabolism of the methylotrophic marine bacterium Methylophaga nitratireducenticrescens strain JAM1 Mauffrey F , Cucaita A , Constant P , Villemur R , 2017 PeerJ (Date Added: 2017-12-13) 28- Survey of High-Affinity H Piché-Choquette S , Khdhiri M , Constant P , 2017 Microbial Ecology (Date Added: 2017-06-28) 27- The tale of a neglected energy source: Elevated hydrogen exposure affects both microbial diversity and function in soil Khdhiri M , Piché-Choquette S , Tremblay J , Tringe S G , Constant P , 2017 Applied and Environmental Microbiology (Date Added: 2017-06-12) 26- Detection and isolation of plant-associated bacteria scavenging atmospheric molecular hydrogen Kanno, M, Constant, P, Tamaki, H, Kamagata, Y 2016 Environmental Microbiology (Date Added: 2017-03-27) 25- H2-saturation of high affinity H2-oxidizing bacteria alters the ecological niche of soil microorganisms unevenly among taxonomic groups Piché-Choquette, S, Tremblay, J, Tringe, SG, Constant, P 2016 PeerJ (Date Added: 2017-03-27) 24- Towards the development of multifunctional molecular indicators combining soil biogeochemical and microbiological variables to predict the ecological integrity of silvicultural practices Peck, V, Quiza, L, Buffet, J-P, Khdhiri, M, Durand, A-A, Paquette, A, Thiffault, N, Messier, C, Beaulieu, N, Guertin, C, Constant, P 2016 Microbial Biotechnology (Date Added: 2017-03-27) 23- Identification of unknown carboxydovore bacteria dominant in deciduous forest soil via succession of bacterial communities, coxl genotypes, and carbon monoxide oxidation activity in soil microcosms Lalonde, I, Constant, P 2016 Applied and Environmental Microbiology (Date Added: 2017-03-27) 22- Breathing air to save energy - new insights into the ecophysiological role of high-affinity [NiFe]-hydrogenase in Streptomyces avermitilis Liot, Q, Constant, P 2016 MicrobiologyOpen (Date Added: 2017-03-27) 21- Surveying the endomicrobiome and ectomicrobiome of bark beetles: The case of Dendroctonus simplex Durand, A-A, Bergeron, A, Constant, P, Buffet, J-P, Déziel, E, Guertin, C 2015 Scientific Reports (Date Added: 2017-03-29) 20- Soil carbon content and relative abundance of high affinity H2-oxidizing bacteria predict atmospheric H2 soil uptake activity better than soil microbial community composition Khdhiri, M, Hesse, L, Popa, ME, Quiza, L, Lalonde, I, Meredith, LK, Röckmann, T, Constant, P 2015 Soil Biology and Biochemistry (Date Added: 2017-03-29) 19- Atmospheric hydrogen scavenging: From enzymes to ecosystems Greening, C, Constant, P, Hards, K, Morales, SE, Oakeshott, JG, Russell, RJ, Taylor, MC, Berney, M, Conrad, R, Cookb, GM 2015 Applied and Environmental Microbiology (Date Added: 2017-03-29) 18- Land-use influences the distribution and activity of high affinity CO-oxidizing bacteria associated to type I-coxL genotype in soil Quiza, L, Lalonde, I, Guertin, C, Constant, P 2014 Frontiers in Microbiology (Date Added: 2017-03-29) 17- Toxicity survey of Canadian Arctic marine sediments Canário, J, Poissant, L, Pilote, M, Blaise, C, Constant, P, Férard, J-F, Gagné, F 2014 Journal of Soils and Sediments (Date Added: 2017-03-29) 15- The fate of mercury in Arctic terrestrial and aquatic ecosystems, a review Douglas, TA, Loseto, LL, MacDonald, RW, Outridge, P, Dommergue, A, Poulain, A, Amyot, M, Barkay, T, Berg, T, Chetelat, J, Constant, P, Evans, M, Ferrari, C, Gantner, N, Johnson, MS, Kirk, J, Kroer, N, Larose, C, Lean, D, Nielsen, TG, Poissant, L, Rognerud, S, Skov, H, Sørensen, S, Wang, F, Wilson, S, Zdanowicz, CM 2012 Environmental Chemistry (Date Added: 2017-03-29) 14- Co-localization of atmospheric H2 oxidation activity and high affinity H2-oxidizing bacteria in non-axenic soil and sterile soil amended with Streptomyces sp. PCB7 Constant, P, Chowdhury, SP, Hesse, L, Conrad, R 2011 Soil Biology and Biochemistry (Date Added: 2017-03-29) 13- Genome data mining and soil survey for the novel group 5 [NiFe]-hydrogenase to explore the diversity and ecological importance of presumptive high-affinity H 2-oxidizing bacteria Constant, P, Chowdhury, SP, Hesse, L, Pratscher, J, Conrad, R 2011 Applied and Environmental Microbiology (Date Added: 2017-03-29) 12- Streptomycetes contributing to atmospheric molecular hydrogen soil uptake are widespread and encode a putative high-affinity [NiFe]-hydrogenase Constant, P, Chowdhury, SP, Pratscher, J, Conrad, R 2010 Environmental Microbiology (Date Added: 2017-03-29) 11- Tropospheric H2 budget and the response of its soil uptake under the changing environment Constant, P, Poissant, L, Villemur, R 2009 Science of the Total Environment (Date Added: 2017-03-29) 10- Isolation of Streptomyces sp. PCB7, the first microorganism demonstrating high-affinity uptake of tropospheric H2 Constant, P, Poissant, L, Villemur, R 2008 ISME Journal (Date Added: 2017-03-29) 9- Critical review of mercury fates and contamination in the arctic tundra ecosystem Poissant, L, Zhang, HH, Canário, J, Constant, P 2008 Science of the Total Environment (Date Added: 2017-03-29) 8- Annual hydrogen, carbon monoxide and carbon dioxide concentrations and surface to air exchanges in a rural area (Québec, Canada) Constant, P, Poissant, L, Villemur, R 2008 Atmospheric Environment (Date Added: 2017-03-29) 7- The ebullition of hydrogen, carbon monoxide, methane, carbon dioxide and total gaseous mercury from the Cornwall Area of Concern Poissant, L, Constant, P, Pilote, M, Canário, J, O'Driscoll, N, Ridal, J, Lean, D 2007 Science of the Total Environment (Date Added: 2017-03-29) 6- Fate of inorganic mercury and methyl mercury within the snow cover in the low arctic tundra on the shore of Hudson Bay (Québec, Canada) Constant, P, Poissant, L, Villemur, R, Yumvihoze, E, Lean, D 2007 Journal of Geophysical Research Atmospheres (Date Added: 2017-03-29) 5- Heterogeneity between 16S ribosomal RNA gene copies borne by one Desulfitobacterium strain is caused by different 100-200 bp insertions in the 5′ region Villemur, R, Constant, P, Gauthier, A, Shareck, M, Beaudet, R 2007 Canadian Journal of Microbiology (Date Added: 2017-03-29) 4- Abiotic source of reactive organic halogens in the sub-arctic atmosphere? Carpenter, LJ, Hopkins, JR, Jones, CE, Lewis, AC, Parthipan, R, Wevill, DJ, Poissant, L, Pilote, M, Constant, P 2005 Environmental Science and Technology (Date Added: 2017-03-29) 3- Water level fluctuations of a Lake Saint-Pierre wetland's (Québec, Canada) and their impact on hydrogen, carbon monoxide, methane and carbon dioxide tropospheric concentrations and fluxes Constant, P, Poissant, L, Villemur, R 2005 Revue des Sciences de l'Eau (Date Added: 2017-03-29) 2- A year of continuous measurements of three atmospheric mercury species (GEM, RGM and Hgp) in southern Québec, Canada Poissant, L, Pilote, M, Beauvais, C, Constant, P, Zhang, HH 2005 Atmospheric Environment (Date Added: 2017-03-29) 1- Mercury gas exchanges over selected bare soil and flooded sites in the bay St. François wetlands (Québec, Canada) Poissant, L, Pilote, M, Constant, P, Beauvais, C, Zhang, HH, Xu, X 2004 Atmospheric Environment (Date Added: 2017-03-29) |
