Effect of static magnetic field on growth and sporulation of some plant pathogenic fungi

Nagy, P.; Fischl, Géza

doi:10.1002/bem.20015

Cited by 30 publications

(27 citation statements)

References 4 publications

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“…Saccharomyces cereVisiae from the slant cultures was aseptically transferred and precultured in 500-mL Erlenmeyer flasks with 300 mL of the medium containing the following components [ (5). The Erlenmeyer flasks were incubated at 30°C and 200 rpm for 12 h. Fermentor was inoculated with 10% v/v concentrated inoculum, and the fermentations were carried out using a medium similar to those used for inoculum preparation but without glucose and adding (NH4) 2 SO 4 [11.75] and sugar cane molasses diluted to attain approximately 160 g L -1 sugar concentration as substitute for glucose.…”

Section: Methodsmentioning

confidence: 99%

“…Saccharomyces cereVisiae used for ethanol production was supplied by Bioengineering Laboratory of the Food Engineering School of The State University of Campinas, Brazil. The microorganism was maintained at 5°C on agar slants whose medium contained [amounts in g L -1 ]: glucose [10], yeast extract [5], malt extract [3], pectin [5], and agar [20].…”

Section: Methodsmentioning

confidence: 99%

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Bioreactor Coupled with Electromagnetic Field Generator: Effects of Extremely Low Frequency Electromagnetic Fields on Ethanol Production by Saccharomyces cerevisiae

et al. 2007

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The effect of extremely low frequency (ELF) magnetic fields on ethanol production by Saccharomyces cerevisiae using sugar cane molasses was studied during batch fermentation. The cellular suspension from the fermentor was externally recycled through a stainless steel tube inserted in two magnetic field generators, and consequently, the ethanol production was intensified. Two magnetic field generators were coupled to the bioreactor, which were operated conveniently in simple or combined ways. Therefore, the recycle velocity and intensity of the magnetic field varied in a range of 0.6-1.4 m s(-1) and 5-20 mT, respectively. However, under the best conditions with the magnetic field treatment (0.9-1.2 m s(-1) and 20 mT plus solenoid), the overall volumetric ethanol productivity was approximately 17% higher than in the control experiment. These results made it possible to verify the effectiveness of the dynamic magnetic treatment since the fermentations with magnetic treatment reached their final stage in less time, i.e., approximately 2 h earlier, when compared with the control experiment.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Bioreactor Coupled with Electromagnetic Field Generator: Effects of Extremely Low Frequency Electromagnetic Fields on Ethanol Production by Saccharomyces cerevisiae

et al. 2007

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“…This can be combined with tropism of living organisms, especially microbes such as viruses, bacteria and fungi . The tip growing systems (fungal hyphae and mycelia) have natural tendencies to respond to external stimuli such as light, nutrients, physical contact, gravity, and electric and magnetic fields . Several studies have proved that light is a reliable tropic factor and stimulant to control the growth, morphology, and biochemical changes in plants and fungi.…”

Section: Introductionmentioning

confidence: 99%

“…[ 5 ] The tip growing systems (fungal hyphae and mycelia) have natural tendencies to respond to external stimuli such as light, [ 17 ] nutrients, [ 18 ] physical contact, [ 19 ] gravity, [ 20 ] and electric and magnetic fi elds. [ 21,22 ] Several studies have proved that light is a reliable tropic factor and stimulant to control the growth, morphology, and biochemical changes in plants and fungi. Specifi cally the fungi can respond to light sources over a wide range of spectrum from ultraviolet to far infrared through a selective wavelength absorption process due to the presence of chromoprotiens and various photoreceptors.…”

Section: Introductionmentioning

confidence: 99%

Visible‐Light‐Induced Directed Gold Microwires by Self‐Organization of Nanoparticles on Aspergillus Niger

Sabah

Kumar

Mohammed

et al. 2013

Part & Part Syst Charact

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A directional point‐to‐point growth of microwires of gold nanoparticles (AuNPs) self‐organized on Aspergillus niger (A. niger) templates by utilizing positive phototropic fungal response to different spectral ranges of visible light is reported. A. niger serves as a living template for the self‐organization of monosodium glutamate (MSG) capped gold colloids under controlled nutrient trigger and appropriate light, temperature, and humidity conditions. The experimental results show that control of these parameters eliminates the need for any microchannels for the directional growth of microwires. The growth rate of fungal hyphae increases exponentially under light illumination compared to its growth in the dark under similar conditions. White light is found to be most suitable to trigger the directional growth. Gold microwires of about 1 to 2 μm diameter and length exceeding 1 mm are grown within a week with a maximum divergence of 40–50° from the light path regardless of the wavelength of the light irradiation. Phototropic response of fungi has been investigated intensively over the last three decades, but this is the first report on the collective use of microbial tropism and directed biomimetic self‐organization of metallic nanoparticles on living organisms.

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“…UV irradiation and ozonation combined with low concentrations of hydrogen peroxide (Heikkinen et al., ), and combinations of manual cleaning, formalin and salt treatments (Torres and Fajardo, ). Nagy and Fischl () found that at a magnetic flux density of 100 μ T, growth of the phytopathogenic fungi Alternaria alternata , Curvularia inaequalis and Fusarium oxysporum decreased by some 10%. As indicated in our preliminary studies, magnetic fields having specific values can also be an effective mycosis prophylaxis (Mazurkiewicz‐Zapałowicz et al., ).…”

Section: Introductionmentioning

confidence: 99%

Modulating effect of a magnetic field on Saprolegnia parasitica, Coker, 1923 infecting trout (Salmo trutta, L.) eggs

et al. 2016

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Summary The aim of study was to investigate the effects of static magnetic fields [1 mT (miliTesla), 5 and 10 mT] on Saprolegnia parasitica growth, development, and cytotoxicity in the infection of trout eggs in hatcheries under laboratory and industrial conditions. The egg envelope (SEM) structures resulting from infection with and development of S. parasitica are also presented. S. parasitica mycelium was cultured on a microbiological medium SDA in Petri dishes (4 ± 0.2°C, 97% humidity) exposed to a magnetic field and in a control, to assess the mycelium growth rate. Effects of the magnetic field on cytotoxicity of S. parasitica after a 21‐day incubation on SDA medium were analyzed using the colorimetric cytotoxicity test MTT. Eggs of brown trout Salmo trutta were infected with S. parasitica by inoculum and incubated in glass vessels (4 ± 0.2°C) in a magnetic field and a control. The degree of mycelium invasion of the egg envelopes and the percentage of egg mortality were recorded daily thoughout the period of embrionic development. The magnetic field effects on brown trout eggs infected by wild strains of fungus‐like organisms (FLO) in the hatchery (4°C ± 0.1) were also investigated. Changes in the structure of brown trout egg envelopes as a result of infection and development of S. parasitica were examined in a FIB/SEM. The effects of magnetic fields of 5 and 10 mT on slowing the growth of mycelium of S. parasitica in vitro were also observed. Determining biochemical properties of S. parasitica also showed the effects of the magnetic field in differentiating the cytotoxicity. All magnetic field values showed a distinct decrease from medium to low values of S. parasitica cytotoxicity; the most effective reduction was observed at 5 mT. Magnetic fields in all tested levels slowed development of the mycelium on the incubated trout eggs, resulting in a decrease in the number of eggs infected by S. parasitica and thus permitting a greater hatching success. Similar effects were observed in other hatching conditions where eggs were also exposed. No negative effects of magnetic field treatment on the condition of the newly‐hatched larvae were observed. The SEM and FIB (Focused Ion Beam) analyses revealed penetration of S. parasitica via radial canals of the envelope. The magnetic field had no effect on the structure of hyphae or sporangia of S. parasitica, but did affect the growth rate of mycelium on the egg surface.

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Effect of static magnetic field on growth and sporulation of some plant pathogenic fungi

Cited by 30 publications

References 4 publications

Bioreactor Coupled with Electromagnetic Field Generator: Effects of Extremely Low Frequency Electromagnetic Fields on Ethanol Production by Saccharomyces cerevisiae

Bioreactor Coupled with Electromagnetic Field Generator: Effects of Extremely Low Frequency Electromagnetic Fields on Ethanol Production by Saccharomyces cerevisiae

Visible‐Light‐Induced Directed Gold Microwires by Self‐Organization of Nanoparticles on Aspergillus Niger

Modulating effect of a magnetic field on Saprolegnia parasitica, Coker, 1923 infecting trout (Salmo trutta, L.) eggs

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