Abstract

RAMIREZ-CADAVID, David A. et al. EFFECT OF ELECTRIC FIELDS ON BIOMASS PRODUCTION OF THE MEDICINAL FUNGUS GANODERMA LUCIDUM [(W. CURT.: FR.) P. KARST. (GANODERMATACEAE)]. Actu Biol [online]. 2010, vol.32, n.92, pp.5-17. ISSN 0304-3584.

The effect of electric fields on the growth of the fungus Ganoderma lucidum [(W. Curt.: Fr) P. Karst. Ganodermataceae] under submerged culture was evaluated in order to optimize the production of biomass. Ganoderma lucidum was exposed to three different factors, types of electric fields [alternating current (AC), direct current (DC) and pulsed current (IM)], field intensities from 0.0 kV cm-1 (control culture) to 3.0 kV cm^-1, stimulation period depending on the growth phase of the fungus after inoculation: day 0 (lag phase), day 3 (exponential or log phase) and day 6 (stationary phase). Results showed that the combination of three factors: AC electric field at an intensity of 1.5 kV cm^-1 applied at day 3 day the highest biomass production with an average of 35.6450 ± 0.6684 gl^-1, whereas the combination of DC electric field at an intensity of 2.5 kV cm^-1 applied at day 6 showed the lowest production of biomass with an average of 26.2950 ± 3.9926 gl^-1. These results show that depending on the combination of evaluated factors, the production of biomass of the fungus Ganoderma lucidum in submerged culture conditions may be stimulated by applying electric fields.

Keywords : biomass production; electric field; Ganoderma lucidum; submerged culture.

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