Uptake and Transformation of Silver Nanoparticles and Ions by Rice Plants Revealed by Dual Stable Isotope Tracing

• DOI: 10.1021/acs.est.8b02471
• Publication Date: 2018-12-11T00:27:08Z
• Authors: Qingqing Yang; Wanyu Shan; Ligang Hu; Yao Zhao; Yinzhu Hou; Yongguang Yin; Yong Liang; Fuyi Wang; Yong Cai; Jingfu Liu; Guibin Jiang
• Keywords: Silver nanoparticle; Elongation

Knowledge on the uptake and transformation of silver nanoparticles (AgNPs) Ag+ ions by organisms is critical for understanding their toxicity. Herein, differential uptake, transformation, translocation AgNPs in hydroponic rice (Oryza sativa L.) assessed modified Hewitt (with Cl– ions, HS(Cl)) Hogland solutions (without HS) using dual stable isotope tracing (107AgNO3 109AgNPs). After coexposure to 107Ag+ 109AgNPs at 50 μg L–1 (as Ag both) 14 days, a stimulatory effect was observed root elongation (increased 68.8 71.9% HS(Cl) HS, respectively). Most (from 109AgNPs) were retained surface, while occurrence ions) root, suggesting direct and/or reduction ions. Higher fractions shoot suggest an vivo oxidation AgNPs. These results demonstrated intertransformation between role as carriers sources organisms, which helpful fate toxicology Ag.