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Nat Microbiol

Title:		Drought re-routes soil microbial carbon metabolism towards emission of volatile metabolites in an artificial tropical rainforest
Author(s):		Honeker LK; Pugliese G; Ingrisch J; Fudyma J; Gil-Loaiza J; Carpenter E; Singer E; Hildebrand G; Shi L; Hoyt DW; Chu RK; Toyoda J; Krechmer JE; Claflin MS; Ayala-Ortiz C; Freire-Zapata V; Pfannerstill EY; Daber LE; Meeran K; Dippold MA; Kreuzwieser J; Williams J; Ladd SN; Werner C; Tfaily MM; Meredith LK;
Address:		"Biosphere 2, University of Arizona, Tucson, AZ, USA. School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, USA. Ecosystem Physiology, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany. Max Planck Institute for Chemistry, Atmospheric Chemistry Department, Mainz, Germany. Department of Ecology, Universitat Innsbruck, Innsbruck, Austria. Department of Environmental Sciences, University of Arizona, Tucson, AZ, USA. Department of Plant Pathology, University of California, Davis, CA, USA. Joint Genome Institute, Walnut Creek, CA, USA. Geo-Biosphere Interactions, Department of Geosciences, University of Tuebingen, Tuebingen, Germany. Environmental Molecular Science Laboratory (EMSL), Earth and Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA. Aerodyne Research, Inc., Billerica, MA, USA. Bruker Daltonics Inc., Billerica, MA, USA. Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, USA. Department of Environmental Sciences, University of Basel, Basel, Switzerland. Biosphere 2, University of Arizona, Tucson, AZ, USA. laurameredith@arizona.edu. School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, USA. laurameredith@arizona.edu"
Journal Title:		Nat Microbiol
Year:		2023
Volume:		20230731
Issue:		8
Page Number:		1480 - 1494
DOI:		10.1038/s41564-023-01432-9
ISSN/ISBN:		2058-5276 (Electronic) 2058-5276 (Linking)
Abstract:		"Drought impacts on microbial activity can alter soil carbon fate and lead to the loss of stored carbon to the atmosphere as CO(2) and volatile organic compounds (VOCs). Here we examined drought impacts on carbon allocation by soil microbes in the Biosphere 2 artificial tropical rainforest by tracking (13)C from position-specific (13)C-pyruvate into CO(2) and VOCs in parallel with multi-omics. During drought, efflux of (13)C-enriched acetate, acetone and C(4)H(6)O(2) (diacetyl) increased. These changes represent increased production and buildup of intermediate metabolites driven by decreased carbon cycling efficiency. Simultaneously,(13)C-CO(2) efflux decreased, driven by a decrease in microbial activity. However, the microbial carbon allocation to energy gain relative to biosynthesis was unchanged, signifying maintained energy demand for biosynthesis of VOCs and other drought-stress-induced pathways. Overall, while carbon loss to the atmosphere via CO(2) decreased during drought, carbon loss via efflux of VOCs increased, indicating microbially induced shifts in soil carbon fate"
Keywords:		*Carbon/metabolism *Rainforest Soil Droughts Carbon Dioxide/metabolism Soil Microbiology;
Notes:		"MedlineHoneker, Linnea K Pugliese, Giovanni Ingrisch, Johannes Fudyma, Jane Gil-Loaiza, Juliana Carpenter, Elizabeth Singer, Esther Hildebrand, Gina Shi, Lingling Hoyt, David W Chu, Rosalie K Toyoda, Jason Krechmer, Jordan E Claflin, Megan S Ayala-Ortiz, Christian Freire-Zapata, Viviana Pfannerstill, Eva Y Daber, L Erik Meeran, Kathiravan Dippold, Michaela A Kreuzwieser, Jurgen Williams, Jonathan Ladd, S Nemiah Werner, Christiane Tfaily, Malak M Meredith, Laura K eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2023/08/01 Nat Microbiol. 2023 Aug; 8(8):1480-1494. doi: 10.1038/s41564-023-01432-9. Epub 2023 Jul 31"