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The role of bacterial consortium and organic amendment in Cu and Fe isotope fractionation in plants on a polluted mine site
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-9389-0289
Institute for Microbiology, Friedrich-Schiller-University, Jena.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-4505-4590
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
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2014 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 21, no 11, p. 6836-6844Article in journal (Refereed) Published
Abstract [en]

Copper and iron isotope fractionation by plant uptake and translocation is a matter of current research. As a way to apply the use of Cu and Fe stable isotopes in the phytoremediation of contaminated sites, the effects of organic amendment and microbial addition in a mine spoiled soil seeded with Helianthus annuus in pot experiments and field trials were studied. Results show that the addition of a microbial consortium of ten bacterial strains has an influence on Cu and Fe isotope fractionation by the uptake and translocation in pot experiments, with an increase in average of 0.99‰ for the δ65Cu values from soil to roots. In the field trial, the amendment with the addition of bacteria and mycorrhiza as single and double inoculation enriches the leaves in 65Cu compared to the soil. As a result of the same trial, the δ56Fe values in the leaves are lower than those from the bulk soil, although some differences are seen according to the amendment used. Siderophores, possibly released by the bacterial consortium, can be responsible for this change in the Cu and Fe fractionation. The overall isotopic fractionation trend for Cu and Fe does not vary for pots and field experiments with or without bacteria. However variations in specific metabolic pathways related to metal-organic complexation and weathering can modify particular isotopic signatures.

Place, publisher, year, edition, pages
2014. Vol. 21, no 11, p. 6836-6844
Keywords [en]
Cu isotopes, Fe isotopes, mine sites, phytoremediation, organic amendments, higher plants, PGPR (plant growth promoting bacteria), metal uptake, Earth sciences - Exogenous eart sciences
Keywords [sv]
Geovetenskap - Exogen geovetenskap
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-11594DOI: 10.1007/s11356-013-2156-1ISI: 000336371000008PubMedID: 24057964Scopus ID: 2-s2.0-84901238232Local ID: a9995b28-bd8d-4e8d-8754-1ddb884bc4f4OAI: oai:DiVA.org:ltu-11594DiVA, id: diva2:984544
Projects
Using MicroBes for the REgulation of heavy metaL mobiLity at ecosystem and landscape scAle: an integrative approach for soil remediation by geobiological processes
Note
Validerad; 2014; 20130910 (natper)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-11-22Bibliographically approved

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Rodríguez, Nathalie PérezRodushkin, IlyaEngström, EmmaAlakangas, LenaÖhlander, Björn

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