Engineering soil organic matter quality: Biodiesel Co-Product (BCP) stimulates exudation of nitrogenous microbial biopolymers

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dc.contributor.authorRedmile-Gordon, Marc A.
dc.contributor.authorEvershed, Richard P.
dc.contributor.authorKuhl, Alison
dc.contributor.authorArmenise, Elena
dc.contributor.authorWhite, Rodger P.
dc.contributor.authorHirsch, Penny R.
dc.contributor.authorGoulding, Keith W.T.
dc.contributor.authorBrookes, Philip C.
dc.date.accessioned2016-03-08T14:32:30Z
dc.date.available2016-03-08T14:32:30Z
dc.date.issued2015-06-19
dc.description.abstractBiodiesel Co-Product (BCP) is a complex organic material formed during the transesterification of lipids. We investigated the effect of BCP on the extracellular microbial matrix or ‘extracellular polymeric substance’ (EPS) in soil which is suspected to be a highly influential fraction of soil organic matter (SOM). It was hypothesised that more N would be transferred to EPS in soil given BCP compared to soil given glycerol. An arable soil was amended with BCP produced from either 1) waste vegetable oils or 2) pure oilseed rape oil, and compared with soil amended with 99% pure glycerol; all were provided with 15N labelled KNO3. We compared transfer of microbially assimilated 15N into the extracellular amino acid pool, and measured concomitant production of exopolysaccharide. Following incubation, the 15N enrichment of total hydrolysable amino acids (THAAs) indicated that intracellular anabolic products had incorporated the labelled N primarily as glutamine and glutamate. A greater proportion of the amino acids in EPS were found to contain 15N than those in the THAA pool, indicating that the increase in EPS was comprised of bioproducts synthesised de novo. Moreover, BCP had increased the EPS production efficiency of the soil microbial community (μg EPS per unit ATP) up to approximately double that of glycerol, and caused transfer of 21% more 15N from soil solution into EPS-amino acids. Given the suspected value of EPS in agricultural soils, the use of BCP to stimulate exudation is an interesting tool to consider in the theme of delivering sustainable intensification.en_UK
dc.identifier.citationMarc A. Redmile-Gordon, Richard P. Evershed, Alison Kuhl, Elena Armenise, Rodger P. White, Penny R. Hirsch, Keith W.T. Goulding, Philip C. Brookes, Engineering soil organic matter quality: Biodiesel Co-Product (BCP) stimulates exudation of nitrogenous microbial biopolymers, Geoderma, Volumes 259–260, December 2015, pp205-212en_UK
dc.identifier.issn0016-7061
dc.identifier.urihttp://dx.doi.org/10.1016/j.geoderma.2015.06.006
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/9754
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subjectExtracellular polymeric substancesen_UK
dc.subjectEPS matrixen_UK
dc.subjectExocellular amino acidsen_UK
dc.subjectExopolysaccharideen_UK
dc.subjectExopeptideen_UK
dc.subjectProtein dynamicsen_UK
dc.subjectNitrateen_UK
dc.subjectGlycerolen_UK
dc.titleEngineering soil organic matter quality: Biodiesel Co-Product (BCP) stimulates exudation of nitrogenous microbial biopolymersen_UK
dc.typeArticleen_UK

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