Response of Total (DNA) and Metabolically Active (RNA) Microbial Communities in Miscanthus × Giganteus Cultivated Soil to Different Nitrogen Fertilization Rates
Journal Article
·
· Microbiology Spectrum
- Iowa State Univ., Ames, IA (United States); Center for Advanced Bioenergy and Bioproducts Innovation, Urbana, IL (United States); CABBI
- Iowa State Univ., Ames, IA (United States); Center for Advanced Bioenergy and Bioproducts Innovation, Urbana, IL (United States)
- Iowa State Univ., Ames, IA (United States); Center for Advanced Bioenergy and Bioproducts Innovation, Urbana, IL (United States); Second Genome Inc., Brisbane, CA (United States)
- Iowa State Univ., Ames, IA (United States); Center for Advanced Bioenergy and Bioproducts Innovation, Urbana, IL (United States); VastBiome Inc., Millbrae, CA (United States)
- Center for Advanced Bioenergy and Bioproducts Innovation, Urbana, IL (United States); Iowa State Univ., Ames, IA (United States)
Miscanthus × giganteus is a promising high-yielding perennial plant to meet growing bioenergy demands; however, the degree to which the soil microbiome affects its nitrogen cycling and subsequently, biomass yield remains unclear. In this study, we hypothesize that contributions of metabolically active soil microbial membership may be underestimated with DNA-based approaches. We assessed the response of the soil microbiome to nitrogen availability in terms of both DNA and RNA soil microbial communities from the Long-term Assessment of Miscanthus Productivity and Sustainability (LAMPS) field trial. DNA and RNA were extracted from 271 samples, and 16S small subunit (SSU) rRNA amplicon sequencing was performed to characterize microbial community structure. Significant differences were observed in the resulting soil microbiomes and were best explained by the sequencing library of origin, either DNA or RNA. Similar numbers of membership were detected in DNA and RNA microbial communities, with more than 90% of membership shared. However, the profile of dominant membership within DNA and RNA differed, with varying proportions of Actinobacteria and Proteobacteria and Firmicutes and Proteobacteria. Only RNA microbial communities showed seasonal responses to nitrogen fertilization, and these differences were associated with nitrogen-cycling bacteria. The relative abundance of bacteria associated with nitrogen cycling was 7-fold higher in RNA than in DNA, and genes associated with denitrifying bacteria were significantly enriched in RNA, suggesting that these bacteria may be underestimated with DNA-only approaches. Our findings indicate that RNA-based SSU characterization can be a significant and complementing resource for understanding the role of soil microbiomes in bioenergy crop production.
- Research Organization:
- Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0018420
- OSTI ID:
- 1860636
- Journal Information:
- Microbiology Spectrum, Journal Name: Microbiology Spectrum Journal Issue: 1 Vol. 10; ISSN 2165-0497
- Publisher:
- American Society for MicrobiologyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
The Impact of Stand Age and Fertilization on the Soil Microbiome of Miscanthus × giganteus
Plant and soil effects on bacterial communities associated with Miscanthus × giganteus rhizosphere and rhizomes
Journal Article
·
Thu Feb 11 19:00:00 EST 2021
· Phytobiomes Journal
·
OSTI ID:1782469
Plant and soil effects on bacterial communities associated with Miscanthus × giganteus rhizosphere and rhizomes
Journal Article
·
Wed Apr 29 20:00:00 EDT 2015
· Global Change Biology. Bioenergy
·
OSTI ID:1361197