title: Effects of Nano Silver Oxide and Silver Ions on Growth of Vigna radiata.
abstract: Transformation of silver oxide nanoparticles (nano-Ag2O) to silver nanoparticles (nano-Ag) and silver ions in environment is possible which might pose toxicity to plants and other species. The objective of this study was to study effects of nano-Ag2O and silver ions on growth of Mung bean (Vigna radiata) seedlings. V. radiata seeds were exposed to nano-Ag2O and silver ions (concentration range: 4.3 × 10(-7), 4.3 × 10(-6), 4.3 × 10(-5), 4.3 × 10(-4), and 4.3 × 10(-3) mol/L) for 6 days. Root length, shoot length and dry weight of seedlings were found to decrease due to exposure of nano-Ag2O and silver ions. These findings indicate silver ions to be more toxic to V. radiata seeds than nano-Ag2O. Silver content in seedlings was found to increase with increasing concentrations of nano-Ag2O and silver ions. Overall, findings of the present study add to the existing knowledge of phytotoxicity of silver-based nanoparticles of different chemical compositions to V. radiata seeds and need to be considered during use of nanoparticles-contaminated water for irrigation purposes.
authors.affiliation: Department of Civil Engineering, Indian Institute of Technology, New Delhi, 110016, India, divyabhujnu@gmail.com.
authors.forename: Divya
authors.initials: D
authors.lastname: Singh
authors.forename: Arun
authors.initials: A
authors.lastname: Kumar
mesh_terms: D007887:Fabaceae / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D053768:Metal Nanoparticles / Q000633:toxicity*; D010087:Oxides / Q000494:pharmacology / Q000633:toxicity*; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development; D036226:Seedlings / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D012834:Silver / Q000494:pharmacology / Q000633:toxicity*; D018030:Silver Compounds / Q000494:pharmacology / Q000633:toxicity*
chemical_list: D010087:Oxides; D018030:Silver Compounds; D012834:Silver; C040225:disilver oxide