Altering the localization and toxicity of arsenic in rice grain
Journal Article
·
· Scientific Reports
- Univ. of Delaware, Newark, DE (United States). Dept. of Plant and Soil Sciences; OSTI
- Univ. of Delaware, Newark, DE (United States). Dept. of Plant and Soil Sciences
Previous work has shown that inorganic As localizes in rice bran whereas DMA localizes in the endosperm, but less is known about co-localization of As and S species and how they are affected by growing conditions. We used high-resolution synchrotron X-ray fluorescence imaging to image As and S species in rice grain from plants grown to maturity in soil (field and pot) and hydroponically (DMA or arsenite dosed) at field-relevant As concentrations. In hydroponics, arsenite was localized in the ovular vascular trace (OVT) and the bran while DMA permeated the endosperm and was absent from the OVT in all grains analyzed, and As species had no affect on S species. In pot studies, soil amended with Si-rich rice husk with higher DMA shifted grain As into the endosperm for both japonica and indica ecotypes. In field-grown rice from low-As soil, As localized in the OVT as arsenite glutathione, arsenite, and DMA. Results support a circumferential model of grain filling for arsenite and DMA and show Si-rich soil amendments alter grain As localization, potentially lessening risk to rice consumers.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- Sponsoring Organization:
- National Institutes of Health (NIH); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1903974
- Journal Information:
- Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 12; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Grain Unloading of Arsenic Species in Rice
Evaluation of quantitative synchrotron radiation micro-X-ray fluorescence in rice grain
Phloem Transport of Arsenic Species from Flag Leaf to Grain During Grain Filling
Journal Article
·
Sun Jan 10 23:00:00 EST 2010
· Plant Physiol.
·
OSTI ID:1002242
Evaluation of quantitative synchrotron radiation micro-X-ray fluorescence in rice grain
Journal Article
·
Tue Feb 14 19:00:00 EST 2023
· Journal of Synchrotron Radiation (Online)
·
OSTI ID:2004589
Phloem Transport of Arsenic Species from Flag Leaf to Grain During Grain Filling
Journal Article
·
Fri Dec 30 23:00:00 EST 2011
· New Phytologist
·
OSTI ID:1042289