Antibacterial effect of a magnetic field on Serratia marcescens and related virulence to Hordeum vulgare and Rubus fruticosus callus cells

Università degli Studi di Urbino, Istituto di Chimica Biologica Giorgio Fornaini, Via Saffi 2, 61029 Urbino PU, Italy.
Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology (Impact Factor: 1.55). 07/2002; 132(2):359-65. DOI: 10.1016/S1096-4959(02)00065-9
Source: PubMed


The exposure to a static magnetic field of 80+/-20 Gauss (8+/-2 mT) resulted in the inhibition of Serratia marcescens growth. Callus cell suspensions from Hordeum vulgare and Rubus fruticosus were also examined and only the former was found to be affected by the magnetic field, which induced a decreased viability. S. marcescens was shown to be virulent only toward H. vulgare and this virulence was reduced by the presence of the magnetic field. The modification of glutathione peroxidase activity under the different experimental conditions allowed us to speculate on the possibility of an oxidative-stress response of H. vulgare both to S. marcescens infection and magnetic field exposure. Since the control of microbial growth by physical agents is of interest for agriculture, medicine and food sciences, the investigation presented herein could serve as a starting point for future studies on the efficacy of static magnetic field as low-cost/easy-handling preservative agent.

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    • "Several studies have been showed that low-frequency EMFs may influence plant growth and development [3] [4] [5]. Also the international discussion about the biological effects of electromagnetic fields, in which we were involved in the past [6], led us to examine the possibility of using such fields to inhibit phytoplasmas growth on plants such as lime. Phytoplasmas are endocellular prokaryotes without cell wall associated with more than 600 diseases in at least 300 plant species [7]. "
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    ABSTRACT: Exposure to electromagnetic fields (EMF) has become an issue of concern for a great many people and is an active area of research. Phytoplasmas, also known as mycoplasma-like organisms, are wall-less prokaryotes that are pathogens of many plant species throughout the world. Effects of electromagnetic fields on the changes of lipid peroxidation, content of H(2)O(2), proline, protein, and carbohydrates were investigated in leaves of two-year-old trees of lime (Citrus aurantifolia) infected by the Candidatus Phytoplasma aurantifoliae. The healthy and infected plants were discontinuously exposed to a 10 KHz quadratic EMF with maximum power of 9 W for 5 days, each 5 h, at 25 °C. Fresh and dry weight of leaves, content of MDA, proline, and protein increased in both healthy and infected plants under electromagnetic fields, compared with those of the control plants. Electromagnetic fields decreased hydrogen peroxide and carbohydrates content in both healthy and infected plants compared to those of the controls.
    The Scientific World Journal 05/2012; 2012:716929. DOI:10.1100/2012/716929 · 1.73 Impact Factor
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    • "A decrease in growth rate of E. coli subjected to 50 Hz, 2 mT for 6 h was demonstrated (El-Sayed et al. 2006). Static magnetic fields were also shown to inhibit growth of bacteria (Piatti et al. 2002, Zhang et al. 2003). These and other studies prompted us to make a thorough investigation on the effects of ELF-EMF on bacteria. "
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    International Journal of Radiation Biology 03/2011; 87(12):1155-61. DOI:10.3109/09553002.2011.560992 · 1.69 Impact Factor
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    • "Exposure of humans, animals and plants to different levels of electromagnetic field becomes a constant of current life, due to ever increasing employment of electrical and technological devices. Notably, even more evidence has been accumulated showing that electromagnetic fields can affect living organisms (Jenrow et al., 1995; Blank & Goodman, 2002; Piatti et al., 2002; Hood, 2004). In plants, the first evidence of the influence of magnetic field on early growth processes dealt with the induction of cress root curvature in the seed by a static magnetic field (Audus, 1960). "
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