Arsenic hyperaccumulation and localization in the pinnule and stipe tissues of the gold-dust fern (Pityrogramma calomelanos (L.) Link var. austroamericana (Domin) Farw.) using quantitative micro-PIXE spectroscopy

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dc.contributor.authorKachenko, AGen_AU
dc.contributor.authorBhatia, NPen_AU
dc.contributor.authorSingh, Ben_AU
dc.contributor.authorSiegele, Ren_AU
dc.date.accessioned2008-04-23T06:47:43Zen_AU
dc.date.accessioned2010-04-30T05:02:21Zen_AU
dc.date.available2008-04-23T06:47:43Zen_AU
dc.date.available2010-04-30T05:02:21Zen_AU
dc.date.issued2007-11en_AU
dc.date.statistics2007-11en_AU
dc.description.abstractSpatial distribution patterns of arsenic (As) in the tissues of a lesser-known As hyperaccumulating fern Pityrogramma calomelanos (L.) Link var. austroamericana (Domin) Farw. (Pteridaceae) have been studied. Quantitative micro-proton-induced X-ray emission (micro-PIXE) spectroscopy was employed to examine As localization in pinnule and stipe cross-sections of this species. In addition, As hyperaccumulation status of P. calomelanos var. austroamericana was compared with the well-known As hyperaccumulating fern Pteris vittata L. Both species were grown in pots under controlled conditions and exposed to four levels of As (0-500 mg As kg(-1)) for 20 weeks. Pityrogramma calomelanos var. austroamericana accumulated up to 16 415 mg As kg(-1) dry weight (DW), however, phytotoxicity symptoms such as necrotic pinnule tips and margins, appeared in fronds with concentrations > 3,008 mg As kg(-1) DW. Arsenic was readilytranslocated to fronds, with concentrations up to 75 times greater in fronds than in roots. Quantitative elemental maps of As generated using micro-PIXE analysis revealed that As concentrations in pinnule cross-sections were higher than in stipe cross-sections with concentrations of 3.7 x 10(3) and 1.6 x 10(3) mg As kg(-1) DW, respectively (as determined by region selection analysis; RSA). In pinnules, RSA revealed variable concentrations of As, however did not resolve a clear pattern of compartmentalization across different anatomical regions. In stipe tissues, As concentrations followed the order vascular bundle > cortex > epidermis (as determined by RSA). Our results show that P. calomelanos var. austroamericana is an As hyperaccumulator and has the potential for use in phytoremediation of soils with low levels (up to 50 mg kg(-1)) of As contamination. © 2007, Springer.en_AU
dc.identifier.citationKachenko, A. G., Bhatia, N. P., Singh, B., & Siegele, R. (2007). Arsenic hyperaccumulation and localization in the pinnule and stipe tissues of the gold-dust fern (Pityrogramma calomelanos (L.) Link var. austroamericana (Domin) Farw.) using quantitative micro-PIXE spectroscopy. Plant and Soil, 300(1-2), 207-219. doi:10.1007/s11104-007-9406-2en_AU
dc.identifier.govdoc1144en_AU
dc.identifier.issn0032-079Xen_AU
dc.identifier.issue1-2en_AU
dc.identifier.journaltitlePlant and Soilen_AU
dc.identifier.pagination207-219en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s11104-007-9406-2en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1118en_AU
dc.identifier.volume300en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectArsenicen_AU
dc.subjectSpatial distributionen_AU
dc.subjectBuildupen_AU
dc.subjectCross sectionsen_AU
dc.subjectPIXE analysisen_AU
dc.subjectSpectroscopyen_AU
dc.titleArsenic hyperaccumulation and localization in the pinnule and stipe tissues of the gold-dust fern (Pityrogramma calomelanos (L.) Link var. austroamericana (Domin) Farw.) using quantitative micro-PIXE spectroscopyen_AU
dc.typeJournal Articleen_AU
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