Nanotechnology in Plant Disease Management: DNA-Directed Silver Nanoparticles on Graphene Oxide as an Antibacterial against Xanthomonas perforans

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Ocsoy I. , PARET M. L. , Ocsoy M. A. , KUNWAR S., Chen T., YOU M., ...Daha Fazla

ACS NANO, cilt.7, ss.8972-8980, 2013 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 7 Konu: 10
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1021/nn4034794
  • Dergi Adı: ACS NANO
  • Sayfa Sayıları: ss.8972-8980


Bacterial spot caused by Xanthomonas perforans is a major disease of tomatoes, leading to reduction in production by 10-50%. While copper (Cu)-based bactericides have been used for disease management, most of the X. perforans strains isolated from tomatoes in Florida and other locations worldwide are Cu-resistant. We have developed DNA-directed silver (Ag) nanoparticles (NPs) grown on graphene oxide (GO). These Ag@dsDNA@G0 composites effectively decrease X. perforans cell viability in culture and on plants. At the very low concentration of 16 ppm of Ag@dsDNA@G0, composites show excellent antibacterial capability in culture with significant advantages in improved stability, enhanced antibacterial activity, and stronger adsorption properties. Application of Ag@dsDNA@G0 at 100 ppm on tomato transplants in a greenhouse experiment significantly reduced the severity of bacterial spot disease compared to untreated plants, giving results similar to those of the current grower standard treatment, with no phytotoxicity.