| Content Provider |
World Health Organization (WHO)-Global Index Medicus |
| Author |
Stewart, Jacob Hansen, Trevor McLean, Joan E. McManus, Paul Das, Siddhartha Britt, David W. Anderson, Anne J. Dimkpa, Christian O. |
| Description |
Country affiliation: United States Author Affiliation: Stewart J ( Department of Biology, Utah State University, Logan, Utah, USA.); Hansen T ( Department of Biology, Utah State University, Logan, Utah, USA.); McLean JE ( Utah Water Research Laboratory, Utah State University, Logan, Utah, USA.); McManus P ( Utah Water Research Laboratory, Utah State University, Logan, Utah, USA.); Das S ( Chemistry and Biochemistry Department, Utah State University, Logan, Utah, USA.); Britt DW ( Biological Engineering Department, Utah State University, Logan, Utah, USA.); Anderson AJ ( Department of Biology, Utah State University, Logan, Utah, USA.); Dimkpa CO ( Department of Biology, Utah State University, Logan, Utah, USA.) |
| Abstract |
Exposure to nanoparticles (NPs) that release metals with potential phytotoxicity could pose problems in agriculture. The authors of the present study used growth in a model growth matrix, sand, to examine the influence of 5 mmol/kg of Na, K, or Ca (added as Cl salts) and root exudates on transformation and changes to the bioactivity of copper(II) oxide (CuO) and zinc oxide (ZnO) NPs on wheat. These salt levels are found in saline agricultural soils. After 14 d of seedling growth, particles with crystallinity typical of CuO or ZnO remained in the aqueous fraction from the sand; particles had negative surface charges that differed with NP type and salt, but salt did not alter particle agglomeration. Reduction in shoot and root elongation and lateral root induction by ZnO NPs were mitigated by all salts. However, whereas Na and K promoted Zn loading into shoots, Ca reduced loading, suggesting that competition with Zn ions for uptake occurred. With CuO NPs, plant growth and loading was modified equally by all salts, consistent with major interaction with the plant with CuO rather than Cu ions. Thus, for both NPs, loading into plant tissues was not solely dependent on ion solubility. These findings indicated that salts in agricultural soils could modify the phytotoxicity of NPs. |
| File Format |
HTM / HTML |
| ISSN |
07307268 |
| Issue Number |
9 |
| Volume Number |
34 |
| e-ISSN |
15528618 |
| Journal |
Environmental Toxicology and Chemistry |
| Language |
English |
| Publisher |
Wiley |
| Publisher Date |
2015-09-01 |
| Publisher Place |
United States |
| Access Restriction |
One Nation One Subscription (ONOS) |
| Subject Keyword |
Water Research Support, Non-u.s. Gov't Salts Toxicity Discipline Environmental Health Metals Discipline Toxicology Journal Article Triticum Plant Shoots Plant Roots Microscopy, Atomic Force Discipline Chemistry Copper Research Support, U.s. Gov't, Non-p.h.s. Seedling Ions Pharmacology Metabolism Drug Effects Particle Size Growth & Development Chemistry Soil Zinc Oxide Metal Nanoparticles |
| Content Type |
Text |
| Resource Type |
Article |
| Subject |
Environmental Chemistry Health, Toxicology and Mutagenesis |
