Selective carbon sources influence the end products of microbial nitrate respiration
العنوان: | Selective carbon sources influence the end products of microbial nitrate respiration |
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المؤلفون: | Hans K. Carlson, Torben Nielsen, Jennifer V. Kuehl, Adam P. Arkin, Morgan N. Price, Alex V. Carr, Alexey E. Kazakov, Trenton K. Owens, Lauren M. Lui, Adam M. Deutschbauer |
المصدر: | The ISME Journal The ISME journal, vol 14, iss 8 |
بيانات النشر: | Nature Publishing Group UK, 2020. |
سنة النشر: | 2020 |
مصطلحات موضوعية: | Technology, Denitrification, chemistry.chemical_element, 010501 environmental sciences, Biology, 01 natural sciences, Microbiology, Enrichment culture, Article, Microbial ecology, 03 medical and health sciences, chemistry.chemical_compound, Nitrate, Ammonium Compounds, Genetics, Ammonium, Nitrite, Lung, Nitrogen cycle, Ecology, Evolution, Behavior and Systematics, Nitrites, 030304 developmental biology, 0105 earth and related environmental sciences, 0303 health sciences, Nitrates, Environmental microbiology, Respiration, Biological Sciences, Carbon, Microbial population biology, chemistry, Environmental chemistry, Environmental Sciences, Biotechnology |
الوصف: | Respiratory and catabolic genes are differentially distributed across microbial genomes. Thus, specific carbon sources may favor different respiratory processes. We profiled the influence of 94 carbon sources on the end products of nitrate respiration in microbial enrichment cultures from diverse terrestrial environments. We found that some carbon sources consistently favor dissimilatory nitrate reduction to ammonium (DNRA/nitrate ammonification) while other carbon sources favor nitrite accumulation or denitrification. For an enrichment culture from aquatic sediment, we sequenced the genomes of the most abundant strains, matched these genomes to 16S rDNA exact sequence variants (ESVs), and used 16S rDNA amplicon sequencing to track the differential enrichment of functionally distinct ESVs on different carbon sources. We found that changes in the abundances of strains with different genetic potentials for nitrite accumulation, DNRA or denitrification were correlated with the nitrite or ammonium concentrations in the enrichment cultures recovered on different carbon sources. Specifically, we found that either L-sorbose or D-cellobiose enriched for a Klebsiella nitrite accumulator, other sugars enriched for an Escherichia nitrate ammonifier, and citrate or formate enriched for a Pseudomonas denitrifier and a Sulfurospirillum nitrate ammonifier. Our results add important nuance to the current paradigm that higher concentrations of carbon will always favor DNRA over denitrification or nitrite accumulation, and we propose that, in some cases, carbon composition can be as important as carbon concentration in determining nitrate respiratory end products. Furthermore, our approach can be extended to other environments and metabolisms to characterize how selective parameters influence microbial community composition, gene content, and function. |
وصف الملف: | application/pdf |
اللغة: | English |
تدمد: | 1751-7370 1751-7362 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa4770607e3f130c30998a63297b961d http://europepmc.org/articles/PMC7368043 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....fa4770607e3f130c30998a63297b961d |
قاعدة البيانات: | OpenAIRE |
تدمد: | 17517370 17517362 |
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