title: Effect of cerium oxide nanoparticles on the quality of rice ( Oryza sativa L.) grains.
abstract: Despite the remarkable number of publications on the interaction of engineered nanoparticles (ENPs) with plants, knowledge of the implications of ENPs in the nutritional value of food crops is still limited. This research was performed to study the quality of rice grains harvested from plants grown in soil treated with cerium oxide nanoparticles (nCeO2). Three rice varieties (high, medium, and low amylose) were cultivated to full maturity in soil amended with nCeO2 at 0 and 500 mg kg(-1) soil. Ce accumulation, nutrient content, antioxidant property, and nutritional quality of the rice grains were evaluated. Results showed that rice grains from nCeO2-treated plants had less Fe, S, prolamin, glutelin, lauric and valeric acids, and starch. Moreover, the nCeO2 reduced in grains all antioxidant values, except flavonoids. Medium- and low-amylose varieties accumulated more Ce in grains than the high-amylose variety, but the grain quality of the medium-amylose variety showed higher sensitivity to the nCeO2 treatment. These results indicate that nCeO2 could compromise the quality of rice. To the authors' knowledge, this is the first report on the effects nCeO2 on rice grain quality.
authors.affiliation: Department of Chemistry, ‡Environmental Science and Engineering Ph.D. Program, and #University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso , 500 West University Avenue, El Paso, Texas 79968, United States.
authors.forename: Cyren M
authors.initials: CM
authors.lastname: Rico
authors.forename: Maria Isabel
authors.initials: MI
authors.lastname: Morales
authors.forename: Ana Cecilia
authors.initials: AC
authors.lastname: Barrios
authors.forename: Ricardo
authors.initials: R
authors.lastname: McCreary
authors.forename: Jie
authors.initials: J
authors.lastname: Hong
authors.forename: Wen-Yee
authors.initials: WY
authors.lastname: Lee
authors.forename: Jose
authors.initials: J
authors.lastname: Nunez
authors.forename: Jose R
authors.initials: JR
authors.lastname: Peralta-Videa
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Gardea-Torresdey
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D002563:Cerium / Q000493:pharmacokinetics / Q000494:pharmacology*; D005227:Fatty Acids / Q000032:analysis / Q000378:metabolism; D063427:Food Quality; D005983:Glutens / Q000032:analysis / Q000378:metabolism; D007850:Lauric Acids / Q000032:analysis / Q000378:metabolism; D053758:Nanoparticles; D009753:Nutritive Value; D012275:Oryza / Q000737:chemistry* / Q000187:drug effects* / Q000378:metabolism; D010421:Pentanoic Acids / Q000032:analysis / Q000378:metabolism; D010940:Plant Proteins / Q000032:analysis / Q000378:metabolism; D055315:Prolamins / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000032:analysis
chemical_list: D000975:Antioxidants; D005227:Fatty Acids; D007850:Lauric Acids; D010421:Pentanoic Acids; D010940:Plant Proteins; D055315:Prolamins; C030358:lauric acid; D002563:Cerium; C030583:ceric oxide; D005983:Glutens; D013213:Starch; C038780:n-pentanoic acid