Evaluation of quantitative synchrotron radiation micro-X-ray fluorescence in rice grain
Journal Article
·
· Journal of Synchrotron Radiation (Online)
- Univ. of Delaware, Newark, DE (United States); SLAC
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- Univ. of Delaware, Newark, DE (United States)
Concentrations of nutrients and contaminants in rice grain affect human health, specifically through the localization and chemical form of elements. Methods to spatially quantify the concentration and speciation of elements are needed to protect human health and characterize elemental homeostasis in plants. Here, an evaluation was carried out using quantitative synchrotron radiation microprobe X-ray fluorescence (SR-µXRF) imaging by comparing average rice grain concentrations of As, Cu, K, Mn, P, S and Zn measured with rice grain concentrations from acid digestion and ICP-MS analysis for 50 grain samples. Better agreement was found between the two methods for high-Z elements. Regression fits between the two methods allowed quantitative concentration maps of the measured elements. These maps revealed that most elements were concentrated in the bran, although S and Zn permeated into the endosperm. Arsenic was highest in the ovular vascular trace (OVT), with concentrations approaching 100 mg kg–1 in the OVT of a grain from a rice plant grown in As-contaminated soil. Quantitative SR-µXRF is a useful approach for comparison across multiple studies but requires careful consideration of sample preparation and beamline characteristics.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 2004589
- Journal Information:
- Journal of Synchrotron Radiation (Online), Journal Name: Journal of Synchrotron Radiation (Online) Journal Issue: 2 Vol. 30; ISSN 1600-5775
- Publisher:
- International Union of CrystallographyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Altering the localization and toxicity of arsenic in rice grain
Speciation and distribution of arsenic and localization of nutrients in rice grains
Grain Unloading of Arsenic Species in Rice
Journal Article
·
Thu Mar 24 20:00:00 EDT 2022
· Scientific Reports
·
OSTI ID:1903974
Speciation and distribution of arsenic and localization of nutrients in rice grains
Journal Article
·
Wed Sep 05 00:00:00 EDT 2012
· New Phytol.
·
OSTI ID:1047325
Grain Unloading of Arsenic Species in Rice
Journal Article
·
Sun Jan 10 23:00:00 EST 2010
· Plant Physiol.
·
OSTI ID:1002242