Quantitative elemental localisation in leaves and stems of nickel hyperaccumulating shrub Hybanthus floribundus subsp floribundus using micro-PIXE spectroscopy

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dc.contributor.authorKachenko, AGen_AU
dc.contributor.authorSingh, Ben_AU
dc.contributor.authorBhatia, NPen_AU
dc.contributor.authorSiegele, Ren_AU
dc.date.accessioned2009-06-12T06:36:44Zen_AU
dc.date.accessioned2010-04-30T05:07:08Zen_AU
dc.date.available2009-06-12T06:36:44Zen_AU
dc.date.available2010-04-30T05:07:08Zen_AU
dc.date.issued2008-02en_AU
dc.date.statistics2008-02en_AU
dc.description.abstractHybanthus floribundus (Lindl.) F.Muell. subsp. floribundus is a native Australian nickel (Ni) hyperaccumulating shrub and a promising species for rehabilitation and phytoremediation of Ni tailings. Spatial localisation and quantification of Ni in leaf and stem tissues of H. floribundus subsp.,floribundus was studied using micro-proton-induced X-ray emission (micro-PIXE) spectroscopy. Young plants, grown in a potting mix under controlled glasshouse conditions were exposed to Ni concentrations of 0 and 26 mM kg(-1) for 20 weeks. Leaf and stem samples were hand-sectioned and freeze-dried prior to micro-PIXE analysis. Elemental distribution maps of leaves revealed Ni concentration of 7800 mg kg(-1) dry weight (DW) in whole leaf sections, which was identical to the bulk tissue analysis. Elemental maps showed that Ni was preferentially localised in the adaxial epidermis (10,000 mg kg(-1) DW) and reached a maximum of up to 10,000 mg kg(-1) DW in the leaf margin. Freeze-dried stem sections from the same plants contained lower Ni than leaf tissues (1800 mg kg(-1) versus 7800 mg kg(-1) DW, respectively), however did not resolve a clear pattern of compartmentalisation across different anatomical regions. Our results suggest localisation in epidermal cells is an important physiological mechanism involved in Ni accumulation and tolerance in leaves of H. floribundus subsp. floribundus. © 2007, Elsevier Ltd.en_AU
dc.identifier.citationKachenko, A. G., Singh, B., Bhatia, N. P., & Siegele, R. (2008). Quantitative elemental localisation in leaves and stems of nickel hyperaccumulating shrub Hybanthus floribundus subsp floribundus using micro-PIXE spectroscopy. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 266(4), 667-676. doi:10.1016/j.nimb.2007.11.053en_AU
dc.identifier.govdoc1456en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination667-676en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2007.11.053en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1351en_AU
dc.identifier.volume266en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPIXE analysisen_AU
dc.subjectLeavesen_AU
dc.subjectPlant stemsen_AU
dc.subjectShrubsen_AU
dc.subjectBiological localizationen_AU
dc.subjectNickelen_AU
dc.titleQuantitative elemental localisation in leaves and stems of nickel hyperaccumulating shrub Hybanthus floribundus subsp floribundus using micro-PIXE spectroscopyen_AU
dc.typeJournal Articleen_AU
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