Abstract:
:Respiration by soil bacteria and fungi is one of the largest fluxes of carbon (C) from the land surface. Although this flux is a direct product of microbial metabolism, controls over metabolism and their responses to global change are a major uncertainty in the global C cycle. Here, we explore an in silico approach to predict bacterial C-use efficiency (CUE) for over 200 species using genome-specific constraint-based metabolic modeling. We find that potential CUE averages 0.62 ± 0.17 with a range of 0.22 to 0.98 across taxa and phylogenetic structuring at the subphylum levels. Potential CUE is negatively correlated with genome size, while taxa with larger genomes are able to access a wider variety of C substrates. Incorporating the range of CUE values reported here into a next-generation model of soil biogeochemistry suggests that these differences in physiology across microbial taxa can feed back on soil-C cycling.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Saifuddin M,Bhatnagar JM,Segrè D,Finzi ACdoi
10.1038/s41467-019-11488-zsubject
Has Abstractpub_date
2019-08-08 00:00:00pages
3568issue
1issn
2041-1723pii
10.1038/s41467-019-11488-zjournal_volume
10pub_type
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