title: Biosynthesis of silver nanoparticles from Trichoderma species.
abstract: A total of 75 isolates belonging to five different species of Trichoderma viz., T. asperellum, T. harzianum, T. longibrachiatum, T. pseudokoningii and T. virens were screened for the production of silver nanoparticles. Although all the isolates produced nanoparticles, T. virens VN-11 could produce maximum nanoparticles as evident from the UV-Vis study. The highest Plasmon band was observed at 420 nm at every 24 h that attained maximum intensity at 120 h (0.543). The high resolution transmission electron microscopy (HRTEM) further provided the morphology of the nanoparticles. These nanoparticles were found single or aggregated with round and uniform in shape and 8-60 nm in size. The nitrate reductase activity of VN-11 was found to be 150 nmol/h/mL which confirmed the production of silver nanoparticles through reduction of Ag+ to Ag0.
authors.affiliation: Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi 110 012, India. prameelancha@yahoo.co.in
authors.forename: T Prameela
authors.initials: TP
authors.lastname: Devi
authors.forename: S
authors.initials: S
authors.lastname: Kulanthaivel
authors.forename: Deeba
authors.initials: D
authors.lastname: Kamil
authors.forename: Jyoti Lekha
authors.initials: JL
authors.lastname: Borah
authors.forename: N
authors.initials: N
authors.lastname: Prabhakaran
authors.forename: N
authors.initials: N
authors.lastname: Srinivasa
mesh_terms: D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology; D050901:Nitrate Reductase / Q000378:metabolism; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D014242:Trichoderma / Q000145:classification / Q000378:metabolism*
chemical_list: D012834:Silver; D050901:Nitrate Reductase