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Quantification of hydroxamate siderophores in soil solutions of podzolic soil profiles in Sweden
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0002-3646-294X
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Uppsala University.
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2006 (English)In: Biometals, ISSN 0966-0844, E-ISSN 1572-8773, Vol. 19, no 3, 269-282 p.Article in journal (Refereed) Published
Abstract [en]

Concentrations up to 2 and 12 nM of the hydroxamate siderophores ferrichrome and ferricrocin, respectively, were identified in soil solutions of podzolic forest soils at four sites in both northern and southern Sweden. No ferrichrysin was detected. As with the dissolved organic carbon and low molecular mass organic acids, the highest concentrations of the siderophores were found in the upper layers i.e. the mor layer, the eluvial and upper illuvial horizons. At the southern sites, the concentrations of ferrichrome and ferricrocin were both of similar magnitude and did not differ between the two sites. In contrast, soil solutions at the two northern sites contained more ferricrocin than ferrichrome; the ferricrocin concentrations were also higher at the northern sites than at the southern sites. Analyses were performed by high performance liquid chromatography with a porous graphitic carbon column on which ferrichrome, ferricrocin and ferrichrysin were separated. Detection by electrospray ionization mass spectrometry (ESI-MS) combined with on-line sample pre-concentration, by means of column-switching, enabled detection limits of 0.1-0.2 nM for ferrichrome, ferrichrysin and ferricrocin. The structural identities of the siderophores were further verified by MS/MS fragmentation. Fragmentation of ferrichrome, ferricrocin and ferrichrysin occured mainly via peptide cleavage. The most intense fragments were typified by the loss of one of the three iron(III) chelating hydroxamate residues, i.e N5-acyl-N5-hydroxy ornithine.

Place, publisher, year, edition, pages
2006. Vol. 19, no 3, 269-282 p.
Keyword [en]
ferrichrome, siderophores, chromatography, mass spectrometry, soil
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-3240DOI: 10.1007/s10534-005-8418-8ISI: 000238531400006PubMedID: 16799865Scopus ID: 2-s2.0-33745380720Local ID: 3193OAI: oai:DiVA.org:miun-3240DiVA: diva2:28272
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VR-Environmental Health

Available from: 2008-09-30 Created: 2009-05-07 Last updated: 2016-09-28Bibliographically approved

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Essén, SofiaBylund, DanHolmström, SaraLundström, Ulla
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