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Graphene oxide/silver nanoparticles composite as a novel agricultural antibacterial agent against Xanthomonas oryzae pv. oryzae for the crop disease management

Abstract

Bacterial leaf blight, caused by Xanthomonas oryzae pv. oryzae (Xoo), is one of the most destructive diseases in the growth and development of rice (Oryza sativa L.). Various chemical biocides have been used to manage this disease, which has led to residual contamination on rice, resistance among the Xoo and significant risks to human health. Here, graphene oxide/silver nanoparticles (GO-Ag) composite was developed and its antibacterial property against Xoo was also investigated. The results indicated that GO-Ag composite displayed almost a four-fold enhancement as compared to that of pure Ag NPs. The bacteria was completely inactivated at a relatively low concentration of 2.5 μg/mL. At cellular level, the integrity of cell was damaged and intercellular contents were leaked out by slow-releasing of silver ions from the GO-Ag composite. At molecular level, this composite induced reactive oxygen species production and inhibited DNA replication. More importantly, phytotoxicity test demonstrated that the as-prepared GO-Ag composite had lower toxicity for the plants than Ag NPs, making it be potential application for the crop disease prevention.

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Publication details

The article was received on 08 Aug 2017, accepted on 27 Sep 2017 and first published on 28 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02942J
Citation: New J. Chem., 2017, Accepted Manuscript
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    Graphene oxide/silver nanoparticles composite as a novel agricultural antibacterial agent against Xanthomonas oryzae pv. oryzae for the crop disease management

    Y. Liang, D. Yang and J. Cui, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02942J

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