Soil minerals affect taxon-specific bacterial growth.

Autor: Finley BK; Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA. bkfinley@uci.edu.; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA. bkfinley@uci.edu.; Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, 92697, USA. bkfinley@uci.edu., Mau RL; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA., Hayer M; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA., Stone BW; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA.; Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA., Morrissey EM; Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, 26506, USA., Koch BJ; Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA.; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA., Rasmussen C; Department of Environmental Science, University of Arizona, Tucson, AZ, 85721, USA., Dijkstra P; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA., Schwartz E; Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA.; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA., Hungate BA; Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA.; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA.
Jazyk: angličtina
Zdroj: The ISME journal [ISME J] 2022 May; Vol. 16 (5), pp. 1318-1326. Date of Electronic Publication: 2021 Dec 20.
DOI: 10.1038/s41396-021-01162-y
Abstrakt: Secondary minerals (clays and metal oxides) are important components of the soil matrix. Clay minerals affect soil carbon persistence and cycling, and they also select for distinct microbial communities. Here we show that soil mineral assemblages-particularly short-range order minerals-affect both bacterial community composition and taxon-specific growth. Three soils with different parent material and presence of short-range order minerals were collected from ecosystems with similar vegetation and climate. These three soils were provided with 18 O-labeled water and incubated with or without artificial root exudates or pine needle litter. Quantitative stable isotope probing was used to determine taxon-specific growth. We found that the growth of bacteria varied among soils of different mineral assemblages but found the trend of growth suppression in the presence of short-range order minerals. Relative growth of bacteria declined with increasing concentration of short-range order minerals between 25-36% of taxa present in all soils. Carbon addition in the form of plant litter or root exudates weakly affected relative growth of taxa (p = 0.09) compared to the soil type (p < 0.01). However, both exudate and litter carbon stimulated growth for at least 34% of families in the soils with the most and least short-range order minerals. In the intermediate short-range order soil, fresh carbon reduced growth for more bacterial families than were stimulated. These results highlight how bacterial-mineral-substrate interactions are critical to soil organic carbon processing, and how growth variation in bacterial taxa in these interactions may contribute to soil carbon persistence and loss.
(© 2021. The Author(s).)
Databáze: MEDLINE
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