dc.contributor.author |
Minnis-Ndimba, Roya
|
|
dc.contributor.author |
Kruger, Johanita
|
|
dc.contributor.author |
Taylor, J.R.N. (John Reginald Nuttall)
|
|
dc.contributor.author |
Mtshali, C.
|
|
dc.contributor.author |
Pineda-Vargas, C.A.
|
|
dc.date.accessioned |
2015-10-13T06:26:02Z |
|
dc.date.issued |
2015-11 |
|
dc.description.abstract |
Micro-proton-induced X-ray emission (micro-PIXE) was used to map the distribution of several nutritionally
important minerals found in the grain tissue of two cultivars of pearl millet (Pennisetum glaucum
(L.) R. Br.). The distribution maps revealed that the predominant localisation of minerals was within the
germ (consisting of the scutellum and embryo) and the outer grain layers (specifically the pericarp and
aleurone); whilst the bulk of the endosperm tissue featured relatively low concentrations of the surveyed
minerals. Within the germ, the scutellum was revealed as a major storage tissue for P and K, whilst Ca,
Mn and Zn were more prominent within the embryo. Fe was revealed to have a distinctive distribution
pattern, confined to the dorsal end of the scutellum; but was also highly concentrated in the outer grain
layers. Interestingly, the hilar region was also revealed as a site of high accumulation of minerals, particularly
for S, Ca, Mn, Fe and Zn, which may be part of a defensive strategy against infection or damage.
Differences between the two cultivars, in terms of the bulk Fe and P content obtained via inductively
coupled plasma optical emission spectrometry (ICP-OES), concurred with the average concentration data
determined from the analysis of micro-PIXE spectra specifically extracted from the endosperm tissue. |
en_ZA |
dc.description.embargo |
2016-11-15 |
|
dc.description.librarian |
hb2015 |
en_ZA |
dc.description.sponsorship |
NRF : iThemba LABS and the University of Pretoria. |
en_ZA |
dc.description.uri |
http://www.elsevier.com/locate/nimb |
en_ZA |
dc.identifier.citation |
Minnis-Ndimba, R, Kruger, J, Taylor, JRN, Mtshali, C & Pineda-Vargas, CA 2015, 'Micro-PIXE mapping of mineral distribution in mature grain of two pearl millet cultivars', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 363, pp. 177-182. |
en_ZA |
dc.identifier.issn |
0168-583X (print) |
|
dc.identifier.issn |
1872-9584 (online) |
|
dc.identifier.other |
10.1016/j.nimb.2015.09.014 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/50212 |
|
dc.language.iso |
en |
en_ZA |
dc.publisher |
Elsevier |
en_ZA |
dc.rights |
© 2015 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, vol. 363, pp. 177-182, 2015. doi : 10.1016/j.nimb.2015.09.014. |
en_ZA |
dc.subject |
Pearl millet |
en_ZA |
dc.subject |
Scutellum |
en_ZA |
dc.subject |
Mineral distribution in grains |
en_ZA |
dc.subject |
Micro-proton-induced X-ray emission (micro-PIXE) |
en_ZA |
dc.title |
Micro-PIXE mapping of mineral distribution in mature grain of two pearl millet cultivars |
en_ZA |
dc.type |
Postprint Article |
en_ZA |