The fungistatic activity of organic selenium and its application to the production of cultivated mushrooms Agaricus bisporus and Pleurotus spp.

Abstract

The activity of organic selenium against pathogenic molds and its use as a potential selenium source in the production of enriched mushrooms were examined. The effect of commercial selenized yeast on mycelia growth was examined using a method with mycelia disks and a well diffusion method. For mushroom enrichment, different concentrations of selenium were added to a growth substrate. The results presented in this paper suggest that the most suitable concentration of selenized yeast that inhibits the growth of the mycopathogenic molds is 70-100 mg/kg of selenium. With the addition of this concentration to the substrate, mushroom fruit bodies will uptake a high level of selenium, about 100 μg/g for Pleurotus spp., and 200 μg/g for Agaricus bisporus in dry weight of the mushroom. Thereby a double effect in the cultivation of mushrooms is achieved. [Projekat Ministarstva nauke Republike Srbije, br. III 46010 and br. III46001

Cobweb, a serious pathology in mushroom crops: A review

“…Finally, Savić et al (2012) tested the antifungal activity of organic selenium against C. dendroides. The addition of 70-100 µg/g selenium to the substrate inhibited growth of the mycopathogen and resulted in the enrichment of basidiomes with this trace element.…”

Selenium‐enriched Coriolus versicolor mushroom biomass: potential novel food supplement with improved selenium bioavailability

“…Relatively low selenium content in the Earth's crust suggests its insufficient content in food in general . It is recognized that organic bonded selenium is safer for use owing to its lower toxicity and better bioavailability . Further, selenium can replace sulfur in the amino acids methionine and cysteine and be incorporated into proteins …”

“…Their fruiting bodies, mycelia or extracts can exhibit biological activities such as antimicrobial, antitumor and antioxidative . Because of their high protein content and ability to absorb minerals from the growing substrate, they can be used for the production of novel food supplements with high selenium content …”

“…In the past decade, several studies based on mushrooms enriched with selenium have been conducted . Although researchers were able to achieve high selenium concentrations in mycelia, the main problems were low biomass yield and percent of selenium transformed into organic form .…”

Possibility of environmentally-safe casing soil disinfection for control of cobweb disease of button mushroom

“…Many alternative compounds, e.g. biopesticides, disinfectants, plant extracts, essential oils and their components, have been tested as control agents against mushroom pathogens in general (Tanović et al, 2009;Savić et al, 2012). The effects of commercially available disinfectants on the mushroom pathogens P. tolaasii, Trichoderma harzianum and C. dendroides (Wong & Preece, 1985;Abosriwil & Clancy, 2002;Todorović et al, 2012) and on plant pathogenic organisms (Lewandowski & Hayes, 2009) have already been evaluated.…”