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Antimicrobial and hormetic effects of silver nanoparticles on in vitro regeneration of vanilla (Vanilla planifolia Jacks. ex Andrews) using a temporary immersion system

  • J. L. Spinoso-Castillo
  • R. A. Chavez-Santoscoy
  • Nina Bogdanchikova
  • J. A. Pérez-Sato
  • V. Morales-Ramos
  • J. J. Bello-Bello
Original Article

Abstract

Microbial contamination is a serious problem in temporary immersion systems (TIS) during commercial micropropagation. The use of adequate doses of silver nanoparticles (AgNPs), formulated as Argovit™, is an alternative to reduce the contamination indices and promote development in plants. The aim of this study was to evaluate the antimicrobial and hormetic effects of Argovit on in vitro regeneration of vanilla (Vanilla planifolia) using a TIS. In vitro regenerated shoots were grown in Murashige and Skoog (MS) liquid medium with Argovit at five different concentrations (0, 25, 50, 100 and 200 mg/l) using a temporary immersion bioreactor system (RITA®). At 30 days of culture, contamination percentage was evaluated and shoot regeneration and length were used to determine the hormetic response. Analysis of macro and micronutrient contents was performed. In addition, the effect of Argovit on total phenolic content (TPC), reactive oxygen species (ROS) production, antioxidant capacity (ORAC) and lipid peroxidation (LP-MDA) was determined. Results showed that bacterial contamination was reduced at 50, 100 and 200 mg/l of Argovit. Growth stimulation was observed at 25 and 50 mg/l of Argovit, while significant inhibition was detected at 100 and 200 mg/l of Argovit. Mineral nutrient analysis revealed changes in macro and micronutrient concentrations exerted by Argovit. Moreover, the presence of Argovit induced the production of ROS and increased total phenolic content, antioxidant capacity and lipid peroxidation with a dose-dependent effect. Results suggested that the production of ROS and mineral nutrition are key mechanisms of AgNPs-induced hormesis for vanilla. Therefore, the addition of 50 mg/l of Argovit in the culture media had an antimicrobial and hormetic effect. Use of Argovit could be an efficient strategy for commercial micropropagation of vanilla and other species.

Keywords

Micropropagation Nanobiotechnology Hormesis RITA® 

Notes

Acknowledgements

This work was supported by Mexican PAPIIT-UNAM No IT200114 and CONACyT No 270242 projects.

Author contributions

All authors listed have made substantial, direct and intellectual contribution to the work, and approved it for publication.

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© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • J. L. Spinoso-Castillo
    • 1
  • R. A. Chavez-Santoscoy
    • 2
  • Nina Bogdanchikova
    • 3
  • J. A. Pérez-Sato
    • 1
  • V. Morales-Ramos
    • 1
  • J. J. Bello-Bello
    • 1
  1. 1.Colegio de Postgraduados-Campus CórdobaVeracruzMexico
  2. 2.Facultad de Ciencias Químicas e IngenieríaUniversidad Autónoma de Baja CaliforniaTijuanaMexico
  3. 3.Centro de Nanociencias y NanotecnologíaUniversidad Nacional Autónoma de MéxicoEnsenadaMexico

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