Studies on spatial distribution of nickel in leaves and stems of the metal hyperaccumulator Stackhousia tryonii Bailey using nuclear microprobe (micro-PIXE) and EDXS techniques

Functional Plant Biology : FPB
Naveen P BhatiaAlan J M Baker

Abstract

Stackhousia tryonii Bailey is one of the three nickel hyperaccumulators reported from Australia. It is a rare, herbaceous plant that accumulates (Ni) both in leaf and stem tissues. Localisation of Ni in leaf and stem tissues of S. tryonii was studied using two micro-analytical techniques, energy dispersive X-ray spectrometry (EDXS) and micro-proton-induced X-ray emission spectrometry (micro-PIXE). Dimethylglyoxime complexation of Ni was also visualised by bright- and dark-field microscopy, but this technique was considered to create artefacts in the distribution of Ni. Energy dispersive X-ray spectrometric analysis indicated that guard cells possessed a lower Ni concentration than epidermal cells, and that epidermal cells and vascular tissue contained higher levels of Ni than mesophyll, as reported for other Ni hyperaccumulators. The highest Ni concentration was recorded (PIXE quantitative point analysis) in the epidermal cells and vascular tissue (5400 μg g-1 DW), approximately double that recorded in palisade cells (2500 μg g-1 DW). However, concentrations were variable within these tissues, explaining, in part, the similarity between average Ni concentrations of these tissues (as estimated by region selection mode). Stem tis...Continue Reading

Citations

Feb 17, 2017·Scientific Reports·Antony van der EntHugh H Harris
Oct 5, 2015·Environmental Monitoring and Assessment·Paula MadejónJosé M Murillo
May 17, 2017·Botanical Studies·M L GaleyN Rajakaruna
Apr 8, 2020·Metallomics : Integrated Biometal Science·Antony van der EntJolanta Mesjasz-Przybyłowicz
Jul 1, 2005·Functional Plant Biology : FPB·Priscila L GratãoRicardo A Azevedo
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Oct 29, 2015·The New Phytologist·Jolanta Mesjasz-PrzybylowiczAntony van der Ent
Feb 26, 2021·Metallomics : Integrated Biometal Science·Farida AbubakariAntony van der Ent
Mar 30, 2010·Environmental Science & Technology·Richard N CollinsBarbara Gouget

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