MeredithOgeeBoyeEtAl2019

Référence

Meredith, L.K., Ogée, J., Boye, K., Singer, E., Wingate, L., von Sperber, C., Sengupta, A., Whelan, M., Pang, E., Keiluweit, M., Brüggemann, N., Berry, J.A., Welander, P.V. (2019) Soil exchange rates of COS and CO 18 O differ with the diversity of microbial communities and their carbonic anhydrase enzymes. ISME Journal, 13(2):290-300. (Scopus )

Résumé

Differentiating the contributions of photosynthesis and respiration to the global carbon cycle is critical for improving predictive climate models. Carbonic anhydrase (CA) activity in leaves is responsible for the largest biosphere-atmosphere trace gas fluxes of carbonyl sulfide (COS) and the oxygen-18 isotopologue of carbon dioxide (CO 18 O) that both reflect gross photosynthetic rates. However, CA activity also occurs in soils and will be a source of uncertainty in the use of COS and CO 18 O as carbon cycle tracers until process-based constraints are improved. In this study, we measured COS and CO 18 O exchange rates and estimated the corresponding CA activity in soils from a range of biomes and land use types. Soil CA activity was not uniform for COS and CO 2 , and patterns of divergence were related to microbial community composition and CA gene expression patterns. In some cases, the same microbial taxa and CA classes catalyzed both COS and CO 2 reactions in soil, but in other cases the specificity towards the two substrates differed markedly. CA activity for COS was related to fungal taxa and β-D-CA expression, whereas CA activity for CO 2 was related to algal and bacterial taxa and α-CA expression. This study integrates gas exchange measurements, enzyme activity models, and characterization of soil taxonomic and genetic diversity to build connections between CA activity and the soil microbiome. Importantly, our results identify kinetic parameters to represent soil CA activity during application of COS and CO 18 O as carbon cycle tracers. © 2018, International Society for Microbial Ecology.

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@ARTICLE { MeredithOgeeBoyeEtAl2019,
    AUTHOR = { Meredith, L.K. and Ogée, J. and Boye, K. and Singer, E. and Wingate, L. and von Sperber, C. and Sengupta, A. and Whelan, M. and Pang, E. and Keiluweit, M. and Brüggemann, N. and Berry, J.A. and Welander, P.V. },
    TITLE = { Soil exchange rates of COS and CO 18 O differ with the diversity of microbial communities and their carbonic anhydrase enzymes },
    JOURNAL = { ISME Journal },
    YEAR = { 2019 },
    VOLUME = { 13 },
    NUMBER = { 2 },
    PAGES = { 290-300 },
    NOTE = { cited By 2 },
    ABSTRACT = { Differentiating the contributions of photosynthesis and respiration to the global carbon cycle is critical for improving predictive climate models. Carbonic anhydrase (CA) activity in leaves is responsible for the largest biosphere-atmosphere trace gas fluxes of carbonyl sulfide (COS) and the oxygen-18 isotopologue of carbon dioxide (CO 18 O) that both reflect gross photosynthetic rates. However, CA activity also occurs in soils and will be a source of uncertainty in the use of COS and CO 18 O as carbon cycle tracers until process-based constraints are improved. In this study, we measured COS and CO 18 O exchange rates and estimated the corresponding CA activity in soils from a range of biomes and land use types. Soil CA activity was not uniform for COS and CO 2 , and patterns of divergence were related to microbial community composition and CA gene expression patterns. In some cases, the same microbial taxa and CA classes catalyzed both COS and CO 2 reactions in soil, but in other cases the specificity towards the two substrates differed markedly. CA activity for COS was related to fungal taxa and β-D-CA expression, whereas CA activity for CO 2 was related to algal and bacterial taxa and α-CA expression. This study integrates gas exchange measurements, enzyme activity models, and characterization of soil taxonomic and genetic diversity to build connections between CA activity and the soil microbiome. Importantly, our results identify kinetic parameters to represent soil CA activity during application of COS and CO 18 O as carbon cycle tracers. © 2018, International Society for Microbial Ecology. },
    AFFILIATION = { Department of Earth System Science, Stanford University, Stanford, CA 94305, United States; School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 85721, United States; INRA/Bordeaux Science Agro, UMR 1391 ISPA, Bordeaux Science Agro, Villenave d’Ornon, Bordeaux, 33140, France; SLAC National Laboratory, Stanford Synchrotron Radiation Lightsource, Menlo Park, CA 94025, United States; Department of Energy Joint Genome Institute, Walnut Creek, CA 94598, United States; Institute for Crop Science and Resource Conservation (INRES), Soil Science and Soil Ecology, University of Bonn, Bonn, 53115, Germany; Department of Geography, McGill University, 805 Sherbrooke St. W., Montreal, QC H3A 0B9, Canada; University of Arizona, Biosphere 2, Tucson, AZ 85721, United States; Department of Global Change Ecology, Carnegie Institution for Science, Stanford, CA 94305, United States; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States; Forschungszentrum Jülich, Institute of Bio- and Geosciences, Agrosphere (IBG-3), Wilhelm-Johnen-Strasse, Jülich, 52428, Germany },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1038/s41396-018-0270-2 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053594773&doi=10.1038%2fs41396-018-0270-2&partnerID=40&md5=5bc1844ccd1338729c91cfdfd530b217 },
}

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