Elevated CO2 shifts the functional structure and metabolic potentials of soil microbial communities in a C4 agroecosystem
- Ningbo Univ. (China). Faculty of Marine Sciences; Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics and Dept. of Microbiology and Plant Biology; DOE/OSTI
- Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics and Dept. of Microbiology and Plant Biology
- Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics and Dept. of Microbiology and Plant Biology; Univ. of California, Berkeley, CA (United States). Dept. of Environmental Science
- Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Natural Resources and Environmental Sciences
- Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics and Dept. of Microbiology and Plant Biology; Chinese Academy of Sciences (CAS), Beijing (China). Key Lab. of Environmental Biotechnology. Research Center for Eco-Environmental Sciences
- Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics and Dept. of Microbiology and Plant Biology; Tsinghua Univ., Beijing (China). Beijing Key Lab. of Environmental Simulation and Pollution Control. School of Environment; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division
Atmospheric CO2 concentration is continuously increasing, and previous studies have shown that elevated CO2 (eCO2) significantly impacts C3 plants and their soil microbial communities. However, little is known about effects of eCO2 on the compositional and functional structure, and metabolic potential of soil microbial communities under C4 plants. Here we showed that a C4 maize agroecosystem exposed to eCO2 for eight years shifted the functional and phylogenetic structure of soil microbial communities at both soil depths (0–5 cm and 5–15 cm) using EcoPlate and functional gene array (GeoChip 3.0) analyses. The abundances of key genes involved in carbon (C), nitrogen (N) and phosphorus (P) cycling were significantly stimulated under eCO2 at both soil depths, although some differences in carbon utilization patterns were observed between the two soil depths. Consistently, CO2 was found to be the dominant factor explaining 11.9% of the structural variation of functional genes, while depth and the interaction of depth and CO2 explained 5.2% and 3.8%, respectively. This study implies that eCO2 has profound effects on the functional structure and metabolic potential/activity of soil microbial communities associated with C4 plants, possibly leading to changes in ecosystem functioning and feedbacks to global change in C4 agroecosystems.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1624765
- Journal Information:
- Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 5; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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