Green synthesis of gold nanoparticles using Wendlandia wallichii, a potent wild edible plant consumed by the tribal of north-eastern region in India

The present study was designed for one–step green synthesis gold nano particles (AuNPS) with the methanol extract of the leaves of Wendlandia wallichii, a potent wild edible plant collected from the north-eastern region in India. The nutritive value, minerals content and antioxidant properties in different solvent extracts of the plant has been carried out. The quantitation of polyphenolics in the leaves of W. wallichii were carried out by High Performance liquid chromatography (HPLC) method. The result of investigation showed the presence of moderate amount of protein, carbohydrate and different minerals. The methanol extract of plant was found to contain total phenolic (TPC) and flavonoid 5050.00±1.14 GAE mg/100 gm and 454.34±0.51 mg/100 gm respectively. The HPLC analysis also indicated the presence of phenolic acids and polyphenolics in various amounts in this wild edible plant. The abundance of protein, fat, carbohydrate, minerals and natural antioxidant components in this plant makes it a considerable sources of nutrition and could be consumed as a regular diet.The formation of gold nano particles with this plant (WW-AuNPs) was confirmed by surface plasmon resonance spectroscopy, high resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD) analyses. The bio-synthesised WW-AuNPs find potentially useful in pharmaceutical and biomedical applications.