Size dependent effects of antifungal phytogenic silver nanoparticles on germination, growth and biochemical parameters of rice (Oryza sativa L), maize (Zea mays L) and peanut (Arachis hypogaea L)

• Published in: IET nanobiotechnology 2017-04, Vol.11 (3), p.277-285
• Main Authors: Prasad, Tollamadugu N.V.K.V, Adam, Shaik, Visweswara Rao, Pasupuleti, Ravindra Reddy, Balam, Giridhara Krishna, Thimmavajjula
• Format: Article
• Language: English
• Subjects: agricultural crops; alcohols; aldehydes; amide functional groups; antibacterial activity; Antifungal Agents - administration & dosage; Antifungal Agents - chemistry; antifungal effects; antifungal phytogenic silver nanoparticles; Arachis hypogaea; Arachis hypogaea L; Aspergillus niger; biochemical parameters; biochemistry; Crops; Crops, Agricultural - drug effects; Crops, Agricultural - physiology; Dose-Response Relationship, Drug; electrokinetic effects; Fourier transform infrared spectra; Fourier transform infrared studies; fungi; Fungicides; Gene Expression Regulation, Developmental - drug effects; Gene Expression Regulation, Developmental - physiology; Gene Expression Regulation, Plant - drug effects; Gene Expression Regulation, Plant - physiology; Germination; Germination - drug effects; Germination - physiology; growth; high‐resolution transmission electron microscopy; Maize; materials synthesis; Metal Nanoparticles - administration & dosage; Metal Nanoparticles - chemistry; Metal Nanoparticles - ultrastructure; microorganisms; nanomedicine; Nanoparticles; organic compounds; Oryza sativa; Oryza sativa L; Parameters; Particle Size; peanut; Peanuts; phytoextract; Plant Development - drug effects; Plant Development - physiology; plant diseases; Plants - drug effects; Plants - metabolism; Research Article; rice; Silver; Silver - administration & dosage; Silver - chemistry; silver particles; size 68.5 nm to 116 nm; size dependent effects; Stevia plant leaf extract; Stevia rebaudiana; Structure-Activity Relationship; transmission electron microscopy; Zea mays; Zea mays L; zeta potential analyser
• ISSN: 1751-8741; 1751-875X; 1751-875X
• DOI: 10.1049/iet-nbt.2015.0122

Advancement in materials synthesis largely depends up on their diverse applications and commercialisation. Antifungal effects of phytogenic silver nanoparticles (AgNPs) were evident, but the reports on the effects of the same on agricultural crops are scant. Herein, we report for the first time, size dependent effects of phytogenic AgNPs (synthesised using Stevia rebaudiana leaf extract) on the germination, growth and biochemical parameters of three important agricultural crops viz., rice (Oryza sativa L), maize (Zea mays L) and peanut (Arachis hypogaea L). AgNPs with varied sizes were prepared by changing the concentration and quantity of the Stevia rebaudiana leaf extract. As prepared AgNPs were characterized using the techniques, such as high-resolution transmission electron microscopy, particle size and zeta potential analyser. The measured (dynamic light scattering technique) average sizes of particles are ranging from 68.5 to 116 nm. Fourier transform infrared studies confirmed the participation of alcohols, aldehydes and amides in the reduction and stabilisation of the AgNPs. Application of these AgNPs to three agricultural crop seeds (rice, maize and peanut) resulted in size dependent effects on their germination, growth and biochemical parameters such as, chlorophyll content, carotenoid and protein content. Further, antifungal activity of AgNPs also evaluated against fungi, Aspergillus niger.