PMID- 25381572 OWN - NLM STAT- MEDLINE DCOM- 20150305 LR - 20220409 IS - 1432-072X (Electronic) IS - 0302-8933 (Linking) VI - 197 IP - 1 DP - 2015 Jan TI - Isolation and characterization of oxalotrophic bacteria from tropical soils. PG - 65-77 LID - 10.1007/s00203-014-1055-2 [doi] AB - The oxalate-carbonate pathway (OCP) is a biogeochemical set of reactions that involves the conversion of atmospheric CO2 fixed by plants into biomass and, after the biological recycling of calcium oxalate by fungi and bacteria, into calcium carbonate in terrestrial environments. Oxalotrophic bacteria are a key element of this process because of their ability to oxidize calcium oxalate. However, the diversity and alternative carbon sources of oxalotrophs participating to this pathway are unknown. Therefore, the aim of this study was to characterize oxalotrophic bacteria in tropical OCP systems from Bolivia, India, and Cameroon. Ninety-five oxalotrophic strains were isolated and identified by sequencing of the 16S rRNA gene. Four genera corresponded to newly reported oxalotrophs (Afipia, Polaromonas, Humihabitans, and Psychrobacillus). Ten strains were selected to perform a more detailed characterization. Kinetic curves and microcalorimetry analyses showed that Variovorax soli C18 has the highest oxalate consumption rate with 0.240 microM h(-1). Moreover, Streptomyces achromogenes A9 displays the highest metabolic plasticity. This study highlights the phylogenetic and physiological diversity of oxalotrophic bacteria in tropical soils under the influence of the oxalate-carbonate pathway. FAU - Bravo, Daniel AU - Bravo D AD - Laboratory of Microbiology, Institute of Biology, University of Neuchatel, Rue Emile-Argand 11, 2000, Neuchatel, Switzerland. FAU - Braissant, Olivier AU - Braissant O FAU - Cailleau, Guillaume AU - Cailleau G FAU - Verrecchia, Eric AU - Verrecchia E FAU - Junier, Pilar AU - Junier P LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141109 PL - Germany TA - Arch Microbiol JT - Archives of microbiology JID - 0410427 RN - 0 (Oxalates) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Soil) RN - 2612HC57YE (Calcium Oxalate) RN - 7440-44-0 (Carbon) RN - 9E7R5L6H31 (Oxalic Acid) SB - IM MH - Biomass MH - Bolivia MH - Calcium Oxalate/metabolism MH - Cameroon MH - Carbon/metabolism MH - *Ecosystem MH - Genes, rRNA MH - Gram-Negative Bacteria/classification/genetics/*isolation & purification/physiology MH - Gram-Positive Bacteria/classification/genetics/*isolation & purification/physiology MH - India MH - Kinetics MH - Oxalates/*metabolism MH - Oxalic Acid/metabolism MH - Phylogeny MH - Plants/metabolism MH - RNA, Ribosomal, 16S/genetics MH - Soil/chemistry MH - *Soil Microbiology MH - Streptomyces/genetics MH - Tropical Climate EDAT- 2014/11/10 06:00 MHDA- 2015/03/07 06:00 CRDT- 2014/11/10 06:00 PHST- 2014/02/28 00:00 [received] PHST- 2014/10/24 00:00 [accepted] PHST- 2014/08/12 00:00 [revised] PHST- 2014/11/10 06:00 [entrez] PHST- 2014/11/10 06:00 [pubmed] PHST- 2015/03/07 06:00 [medline] AID - 10.1007/s00203-014-1055-2 [doi] PST - ppublish SO - Arch Microbiol. 2015 Jan;197(1):65-77. doi: 10.1007/s00203-014-1055-2. Epub 2014 Nov 9.