Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 16, Issue 2, 2014; Page No.(279-284)

EVALUATION OF PHYTOTOXICITY OF METALLIC NANOPARTICLES AGAINST AMARANTHUS RETROFLEXUS

A. ARUNA, S.KARTHICK RAJA NAMASIVAYAM AND P. SARATH CHANDU

Abstract

Nanotechnology is currently employed as a tool to explore the darkest avenues of medical sciences in several ways like imaging, sensing, targeted drug delivery, gene delivery systems and artificial implants. Based on enhanced effectiveness, the new age drugs re-nanoparticles of polymers, metals or ceramics, which can combat conditions like cancer and fight human pathogens like bacteria. Developmental phytotoxicity of NMS is a critical knowledge gap because nanoparticles entering wastewater streams may predominantly be incorporated intosewage sludge and applied to agricultural fields. In the present study, phytotoxicity of chemogenic metallic nanoparticles such as silver, nano zero valent iron and zinc oxide against common weed against Amaranthus retroflexus. Nanoparticles were synthesized by chemical reduction of metal precursor with reducing agent and the synthesized nanoparticles characterized by scanning electron among the different nanoparticles treatment ,zinc oxide nanoparticles showed distinct herbicidal activity at all the tested concentration followed by silver. The activity of the nano particles was at 300C fallowed by 400C. Chlorophyll content was highly reduced in all the tested concentration. Phyllosphere microbial population was not recorded in all the nanoparticles treatment.

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