title: Glucoxylan-mediated green synthesis of gold and silver nanoparticles and their phyto-toxicity study.
abstract: A green synthesis of gold and silver nanoparticles having exceptional high stability is reported. The synthesis involves the use of glucoxylans isolated from seeds of Mimosa pudica and excludes the use of conventional reducing and capping agents. The average particle sizes were 40 and 6 nm for gold and silver, respectively. The size of gold particles obtained in this work is suitable for drug delivery as they are non-cytotoxic. In phyto-toxicity tests the gold and silver nanoparticles did not show any significant effect on germination of radish seeds, whereas in radish seedling root growth assay the two particles behaved differently. The silver nanoparticles exhibited a concentration-dependent stimulatory effect on root length, whereas the gold nanoparticles had no significant effect in this test. The likely mechanism of these effects is discussed.
authors.affiliation: Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan; Department of Chemistry, LCW University, Lahore 54600, Pakistan.
authors.forename: Fozia
authors.initials: F
authors.lastname: Iram
authors.affiliation: Department of Chemistry, Forman Christian College, Lahore 54600, Pakistan. Electronic address: saeediq50@hotmail.com.
authors.forename: Mohammad S
authors.initials: MS
authors.lastname: Iqbal
authors.affiliation: Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan.
authors.forename: Muhammad M
authors.initials: MM
authors.lastname: Athar
authors.affiliation: Department of Physics, COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad, Pakistan.
authors.forename: Muhammad Z
authors.initials: MZ
authors.lastname: Saeed
authors.affiliation: Department of Chemistry, LCW University, Lahore 54600, Pakistan.
authors.forename: Abida
authors.initials: A
authors.lastname: Yasmeen
authors.affiliation: Center for Advanced Studies in Physics, GC University, Lahore 54000, Pakistan.
authors.forename: Riaz
authors.initials: R
authors.lastname: Ahmad
mesh_terms: D018525:Germination / Q000187:drug effects; D005936:Glucans / Q000737:chemistry*; D055772:Green Chemistry Technology; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000633:toxicity; D031224:Raphanus / Q000187:drug effects* / Q000502:physiology; D012834:Silver / Q000737:chemistry*; D014990:Xylans / Q000737:chemistry*
chemical_list: D005936:Glucans; D014990:Xylans; C029353:xyloglucan; D012834:Silver
keywords: Glucoxylans; Gold nanoparticles; Green synthesis; Hemicelluloses; Phyto-toxicity; Silver nanoparticles