Format

Send to

Choose Destination
Plant Physiol Biochem. 2017 Jan;110:185-193. doi: 10.1016/j.plaphy.2015.12.013. Epub 2015 Dec 25.

Bioavailability of cerium oxide nanoparticles to Raphanus sativus L. in two soils.

Author information

1
Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843, USA.
2
Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, 123 Huntington Street, New Haven, CT 06504, USA.
3
Department of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA.
4
Department of Civil and Environmental Engineering, Southern Illinois University, Carbondale, IL 62901, USA.
5
Department of Plant Biology and Center for Ecology, Southern Illinois University, Carbondale, IL 62901, USA.
6
Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843, USA. Electronic address: xma@civil.tamu.edu.

Abstract

Cerium oxide nanoparticles (CeO2 NP) are a common component of many commercial products. Due to the general concerns over the potential toxicity of engineered nanoparticles (ENPs), the phytotoxicity and in planta accumulation of CeO2 NPs have been broadly investigated. However, most previous studies were conducted in hydroponic systems and with grain crops. For a few studies performed with soil grown plants, the impact of soil properties on the fate and transport of CeO2 NPs was generally ignored even though numerous previous studies indicate that soil properties play a critical role in the fate and transport of environmental pollutants. The objectives of this study were to evaluate the soil fractionation and bioavailability of CeO2 NPs to Raphanus sativus L (radish) in two soil types. Our results showed that the silty loam contained slightly higher exchangeable fraction (F1) of cerium element than did loamy sand soil, but significantly lower reducible (F2) and oxidizable (F3) fractions as CeO2 NPs concentration increased. CeO2 NPs associated with silicate minerals or the residue fraction (F4) dominated in both soils. The cerium concentration in radish storage root showed linear correlation with the sum of the first three fractions (r2 = 0.98 and 0.78 for loamy sand and silty loam respectively). However, the cerium content in radish shoots only exhibited strong correlations with F1 (r2 = 0.97 and 0.89 for loamy sand and silty loam respectively). Overall, the results demonstrated that soil properties are important factors governing the distribution of CeO2 NPs in soil and subsequent bioavailability to plants.

KEYWORDS:

Bioavailability; Cerium oxide nanoparticles; Radish; Soil fractionation

PMID:
26754029
DOI:
10.1016/j.plaphy.2015.12.013
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center