Bio-based synthesis of nano silver using Tridax procumbens leaf extract and its impacts on germination and metabolic act
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SHORT COMMUNICATION
Bio-based synthesis of nano silver using Tridax procumbens leaf extract and its impacts on germination and metabolic activity of Solanum lycopersicum L. Ravi Kumar Yadav1 • N. B. Singh1 • Ajey Singh1 • Vijaya Yadav1 • K. M. Niharika1 • Shubhra Khare1 Received: 30 March 2020 / Accepted: 1 November 2020 Ó Society for Plant Biochemistry and Biotechnology 2020
Abstract The overspreading use of silver nanoparticles (AgNPs) in biological systems demands its use as green synthesized AgNPs. In the present study, biologically synthesized AgNPs by Tridax procumbens leaf extract were tested for the germination, plant growth, and anti-oxidative enzymatic activities of Solanum lycopersicum. AgNPs were extensively characterized using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, UV–visible, high-resolution transmission electron microscope particle size analysis based on dynamic light scattering. Our result demonstrated that with a sequential increase in the concentrations of AgNO3 (bulk), antioxidant activity and other stress marking parameters in the test plant enhanced. This study adds wide insight into the fact that AgNPs could have a positive effect at an appropriate concentration. Keywords Green synthesis Nanoparticles AgNPs Tridax procumbens Solanum lycopersicum Abbreviations AgNPs Silver nanoparticles NPs Nanoparticles FTIR Fourier transform infrared spectroscopy XRD X-ray diffraction HR High resolution transmission electron TEM microscope SAED Selected area electron diffraction SEM Scanning electron microscope ED Energy dispersive x-ray SOD Superoxide dismutase CAT Catalase APX Ascorbate peroxidase GPX Glutathione peroxidase NBT Nitro-blue tetrazolium Chl Chlorophyll
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13562-020-00629-x) contains supplementary material, which is available to authorized users. & N. B. Singh [email protected] 1
Plant Physiology Laboratory, Department of Botany, University of Allahabad, Prayagraj 211002, India
‘Nanotechnology’ is a branch of science which deals with the studies and experimental aspects of the tiny particles or nanoparticles (NPs). The size of NPs which ranges between 1 and 100 nm gives them definite physicochemical characteristics and provides versatile scaffolds for fictionalization with biomolecules. Though crude size materials are used to synthesize NPs, their chemical properties are completely altered from their source material due to their small size and shape (Singh et al. 2019). The research in the area of interaction between plants and NPs and the effects of NPs on ecosystems need to be focused in terms to study its role in environmental toxicity. The current researches have been done on AgNPs and it is still challenging to explain whether the toxicity is linked with AgNPs or because of dissolved forms of Ag? ions and their co-occurrence with AgNPs. Chemical and physical methods are traditionally used to synthesize NPs in which chemical methods a
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