SYNTHESIS OF SILVER NANOPARTICLES USING Aspergillus niger Tiegh AND ITS EFFECTS ON Xanthomonas oryzae pv. oryzae
DOI:

Palavras-chave:
synthesis, AgNPs, reducing agentResumo
Silver nanoparticles (AgNPs) have become widely recognized for their potent antibacterial properties. The current study develops an environment-friendly approach using Aspergillus niger Tiegh as a reducing agent in the synthesis of AgNPs. Hence, this study aimed to evaluate the nanomaterials synthesized with optimized concentrations of silver nitrate (0.5, 1.0 and 1.5 mM) and assessed its antibacterial activity against Xanthomonas oryzae pv. oryzae causing bacterial leaf blight in rice. Optimizing different concentrations of silver nitrate in the biosynthetic process revealed significant effects on the size of synthesized AgNPs. The nanoparticles were characterized through UV-visible spectroscopy, SEM coupled with EDX and FTIR Spectroscopy. The study concluded that 1.0 mM concentration yields the smallest synthesized nanoparticles sizes ranging from 68-99 nm. In vitro assay was done through agar well diffusion method and showed high significance (p<0.0000) against Xanthomonas oryzae pv. oryzae.
Keywords: synthesis; AgNPs; reducing agent.
Síntese de nanopartículas de prata usando Aspergillus niger Tiegh e seus efeitos sobre Xanthomonas oryzae pv. oryzae
RESUMO: As nanopartículas de prata (AgNPs) tornaram-se amplamente reconhecidas por suas potentes propriedades antibacterianas. O estudo atual desenvolve uma abordagem ecologicamente correta usando Aspergillus niger Tiegh como um agente redutor na síntese de AgNPs. Portanto, este estudo teve como objetivo avaliar os nanomateriais sintetizados com concentrações otimizadas de nitrato de prata (0,5, 1,0 e 1,5 mM) e avaliou sua atividade antibacteriana contra Xanthomonas oryzae pv. oryzae, causadora da queima bacteriana das folhas em arroz. A otimização de diferentes concentrações de nitrato de prata no processo biossintético revelou efeitos significativos no tamanho das AgNPs sintetizadas. As nanopartículas foram caracterizadas por espectroscopia UV-visível, SEM acoplada a espectroscopia EDX e FTIR. O estudo concluiu que a concentração de 1,0 mM produz os melhores tamanhos de nanopartículas sintetizadas, variando de 68 a 99 nm. O ensaio in vitro foi feito pelo método de difusão em poço de ágar e mostrou alta significância (p<0,0000) contra Xanthomonas oryzae pv. oryzae.
Palavras-chave: síntese; AgNPs; agente redutor.
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