Speciation and distribution of arsenic and localization of nutrients in rice grains
(2009) In New Phytologist 184(1). p.193-201- Abstract
- Arsenic (As) contamination of rice grains and the generally low concentration of micronutrients in rice have been recognized as a major concern for human health. Here, we investigated the speciation and localization of As and the distribution of (micro) nutrients in rice grains because these are key factors controlling bioavailability of nutrients and contaminants. Bulk total and speciation analyses using high-pressure liquid chromatography (HPLC)-inductively coupled plasma mass spectrometry (ICP-MS) and X-ray absorption near-edge spectroscopy (XANES) was complemented by spatially resolved microspectroscopic techniques (mu-XANES, mu-X-ray fluorescence (mu-XRF) and particle induced X-ray emission (PIXE)) to investigate both speciation and... (More)
- Arsenic (As) contamination of rice grains and the generally low concentration of micronutrients in rice have been recognized as a major concern for human health. Here, we investigated the speciation and localization of As and the distribution of (micro) nutrients in rice grains because these are key factors controlling bioavailability of nutrients and contaminants. Bulk total and speciation analyses using high-pressure liquid chromatography (HPLC)-inductively coupled plasma mass spectrometry (ICP-MS) and X-ray absorption near-edge spectroscopy (XANES) was complemented by spatially resolved microspectroscopic techniques (mu-XANES, mu-X-ray fluorescence (mu-XRF) and particle induced X-ray emission (PIXE)) to investigate both speciation and distribution of As and localization of nutrients in situ. The distribution of As and micronutrients varied between the various parts of the grains (husk, bran and endosperm) and was characterized by element-specific distribution patterns. The speciation of As in bran and endosperm was dominated by As(III)-thiol complexes. The results indicate that the translocation from the maternal to filial tissues may be a bottleneck for As accumulation in the grain. Strong similarities between the distribution of iron (Fe), manganese (Mn) and phosphorus (P) and between zinc (Zn) and sulphur (S) may be indicative of complexation mechanisms in rice grains. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1474995
- author
- Lombi, E. ; Scheckel, K. G. ; Pallon, Jan LU ; Carey, A. M. ; Zhu, Y. G. and Meharg, A. A.
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- particle induced X-ray emission (PIXE), arsenic (As), micronutrients, rice grain, synchrotron
- in
- New Phytologist
- volume
- 184
- issue
- 1
- pages
- 193 - 201
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000269541600019
- scopus:68049116620
- ISSN
- 1469-8137
- DOI
- 10.1111/j.1469-8137.2009.02912.x
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Nuclear Physics (Faculty of Technology) (011013007)
- id
- faff017f-d8d3-4365-afc3-d571b6849890 (old id 1474995)
- date added to LUP
- 2016-04-01 11:37:49
- date last changed
- 2022-04-28 17:33:21
@article{faff017f-d8d3-4365-afc3-d571b6849890,
abstract = {{Arsenic (As) contamination of rice grains and the generally low concentration of micronutrients in rice have been recognized as a major concern for human health. Here, we investigated the speciation and localization of As and the distribution of (micro) nutrients in rice grains because these are key factors controlling bioavailability of nutrients and contaminants. Bulk total and speciation analyses using high-pressure liquid chromatography (HPLC)-inductively coupled plasma mass spectrometry (ICP-MS) and X-ray absorption near-edge spectroscopy (XANES) was complemented by spatially resolved microspectroscopic techniques (mu-XANES, mu-X-ray fluorescence (mu-XRF) and particle induced X-ray emission (PIXE)) to investigate both speciation and distribution of As and localization of nutrients in situ. The distribution of As and micronutrients varied between the various parts of the grains (husk, bran and endosperm) and was characterized by element-specific distribution patterns. The speciation of As in bran and endosperm was dominated by As(III)-thiol complexes. The results indicate that the translocation from the maternal to filial tissues may be a bottleneck for As accumulation in the grain. Strong similarities between the distribution of iron (Fe), manganese (Mn) and phosphorus (P) and between zinc (Zn) and sulphur (S) may be indicative of complexation mechanisms in rice grains.}},
author = {{Lombi, E. and Scheckel, K. G. and Pallon, Jan and Carey, A. M. and Zhu, Y. G. and Meharg, A. A.}},
issn = {{1469-8137}},
keywords = {{particle induced X-ray emission (PIXE); arsenic (As); micronutrients; rice grain; synchrotron}},
language = {{eng}},
number = {{1}},
pages = {{193--201}},
publisher = {{Wiley-Blackwell}},
series = {{New Phytologist}},
title = {{Speciation and distribution of arsenic and localization of nutrients in rice grains}},
url = {{http://dx.doi.org/10.1111/j.1469-8137.2009.02912.x}},
doi = {{10.1111/j.1469-8137.2009.02912.x}},
volume = {{184}},
year = {{2009}},
}