Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc

Stable isotope signature of Zn have shown great promise in elucidating changes in uptake and translocation mechanisms of this metal in plants during environmental changes. Here we tested this potential by investigating the effect of high Zn concentrations on the isotopic fractionation patterns of Ph...

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Autores: Caldelas, Cristina, Dong, S., Araus Ortega, José Luis, Weiss, Dominik Jakob
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2010
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/120522
Acceso en línea:https://hdl.handle.net/2445/120522
Access Level:acceso abierto
Palabra clave:Isòtops
Plantes
Zinc
Isotopes
Plants
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spelling Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zincCaldelas, CristinaDong, S.Araus Ortega, José LuisWeiss, Dominik JakobIsòtopsPlantesZincIsotopesPlantsZincStable isotope signature of Zn have shown great promise in elucidating changes in uptake and translocation mechanisms of this metal in plants during environmental changes. Here we tested this potential by investigating the effect of high Zn concentrations on the isotopic fractionation patterns of Phragmites australis (Cav.) Trin. ex Steud. Plants were grown for 40 d in a nutritive solution containing 3.2 µM (sufficient) or 2 mM (toxic) Zn. The Zn isotopic composition of roots, rhizomes, shoots and leaves was analysed. Stems and leaves were sampled at different heights to evaluate the effect of long-distance transport on Zn fractionation. During Zn sufficiency, roots, rhizomes and shoots were isotopically heavy (δ66ZnJMC Lyon = 0.2¿) while the youngest leaves were isotopically light (-0.5 ¿). During Zn excess, roots were still isotopically heavier (δ66Zn = 0.5 ¿) and the rest of the plant was isotopically light (up to -0.5 ¿). The enrichment of heavy isotopes at the roots was attributed to Zn uptake mediated by transporter proteins under Zn sufficient conditions and to chelation and compartmentation in Zn excess. The isotopically lighter Zn in shoots and leaves is consistent with long distance root to shoot transport. The tolerance response of P. australis increased the range of Zn fractionation within the plant and with respect to the environment.Oxford University Press2018201820102018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion10 p.application/pdfhttps://hdl.handle.net/2445/120522Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1093/jxb/erq414Journal of Experimental Botany, 2010, vol. 62, num. 6, p. 2169-2178https://doi.org/10.1093/jxb/erq414(c) Caldelas Molina, Cristina et al., 2010info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1205222026-05-29T05:05:01Z
dc.title.none.fl_str_mv Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
title Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
spellingShingle Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
Caldelas, Cristina
Isòtops
Plantes
Zinc
Isotopes
Plants
Zinc
title_short Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
title_full Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
title_fullStr Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
title_full_unstemmed Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
title_sort Zinc isotopic fractionation in Phragmites australis in response to toxic levels of zinc
dc.creator.none.fl_str_mv Caldelas, Cristina
Dong, S.
Araus Ortega, José Luis
Weiss, Dominik Jakob
author Caldelas, Cristina
author_facet Caldelas, Cristina
Dong, S.
Araus Ortega, José Luis
Weiss, Dominik Jakob
author_role author
author2 Dong, S.
Araus Ortega, José Luis
Weiss, Dominik Jakob
author2_role author
author
author
dc.subject.none.fl_str_mv Isòtops
Plantes
Zinc
Isotopes
Plants
Zinc
topic Isòtops
Plantes
Zinc
Isotopes
Plants
Zinc
description Stable isotope signature of Zn have shown great promise in elucidating changes in uptake and translocation mechanisms of this metal in plants during environmental changes. Here we tested this potential by investigating the effect of high Zn concentrations on the isotopic fractionation patterns of Phragmites australis (Cav.) Trin. ex Steud. Plants were grown for 40 d in a nutritive solution containing 3.2 µM (sufficient) or 2 mM (toxic) Zn. The Zn isotopic composition of roots, rhizomes, shoots and leaves was analysed. Stems and leaves were sampled at different heights to evaluate the effect of long-distance transport on Zn fractionation. During Zn sufficiency, roots, rhizomes and shoots were isotopically heavy (δ66ZnJMC Lyon = 0.2¿) while the youngest leaves were isotopically light (-0.5 ¿). During Zn excess, roots were still isotopically heavier (δ66Zn = 0.5 ¿) and the rest of the plant was isotopically light (up to -0.5 ¿). The enrichment of heavy isotopes at the roots was attributed to Zn uptake mediated by transporter proteins under Zn sufficient conditions and to chelation and compartmentation in Zn excess. The isotopically lighter Zn in shoots and leaves is consistent with long distance root to shoot transport. The tolerance response of P. australis increased the range of Zn fractionation within the plant and with respect to the environment.
publishDate 2010
dc.date.none.fl_str_mv 2010
2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/120522
url https://hdl.handle.net/2445/120522
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1093/jxb/erq414
Journal of Experimental Botany, 2010, vol. 62, num. 6, p. 2169-2178
https://doi.org/10.1093/jxb/erq414
dc.rights.none.fl_str_mv (c) Caldelas Molina, Cristina et al., 2010
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Caldelas Molina, Cristina et al., 2010
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 10 p.
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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