Journal Article

Green Synthesis of Silver Nanoparticles Using Mushroom Flammulina velutipes Extract and Their Antibacterial Activity Against Aquatic Pathogens

Zhao, Yancui, Zhang, Lizhi, Wei, Yanan, Wu, Fanlin, Su, Hongyan, Wang, Lei, Wang, Hongxin, Liu, Xiaoli, Wu, Hongyan

2020

Overview

In recent years, the biosynthesized silver nanoparticles (AgNPs) have been projected as an alternative to traditional antibiotics for their superior antimicrobial properties and significant inhibition of the biofilm formation. Particularly, it is found that the effectiveness of AgNPs varies greatly with the biomaterial used in their synthesis. Mushrooms are natural resources for excellent antioxidants and bioactive compounds. Nevertheless, there are few reports on the application of mushrooms in AgNPs biosynthesis. In this study, AgNPs were successfully synthesized using Flammulina velutipes extract as reductants and stabilizing agents. The following analyses of UV-visible spectroscopy showed typical absorbance peak at 450 nm. Transmission electron microscope analysis indicated that the prepared AgNPs were monodispersed spheres with an average size of approximately 22 nm. X-ray diffraction analysis confirmed the face-centered cubic (fcc) crystalline structure of metallic silver. Furthermore, the synthesized AgNPs exhibited high stability and antibacterial activities against 6 aquatic pathogens. A subsequent challenge experiment showed that the prepared AgNPs significantly reduced the mortality rate of Ruditapes philippinarum clam infected with Vibrio parahaemolyticus . Notably, AgNPs treatment could inhibit the biofilm formation of the pathogen, indicating that the extracellular synthesis of AgNPs using mushroom can be developed into a novel effective antimicrobial agent to overcome the multidrug-resistant microorganisms in aquaculture. This study will open a new way for edible mushroom processing and wide application in aquaculture.

• Publisher: Springer US,Springer Nature B.V
• Subject: absorbance / Agriculture / Antibacterial activity / antibacterial properties / Antibiotics / Antimicrobial agents / Antioxidants / Aquaculture / Bioactive compounds / biocompatible materials / biofilm / Biofilms / Biomaterials / Biomedical materials / bioprocessing / Biosynthesis / Biotechnology / Chemistry / Chemistry and Materials Science / Chemistry/Food Science / clams / crystal structure / Flammulina velutipes / Food Science / Microorganisms / mortality / Multidrug resistance / multiple drug resistance / Mushrooms / Nanoparticles / nanosilver / Natural resources / Original Research / Pathogens / Reducing agents / Ruditapes philippinarum / Silver / Spectroscopy / Stabilizers (agents) / transmission electron microscopes / ultraviolet-visible spectroscopy / Vibrio parahaemolyticus / Waterborne diseases / X-ray diffraction