Antioxidant and Antimicrobial Influence on Oyster Mushrooms (Pleurotus ostreatus) from Substrate Supplementation of Calcium Silicate

Abstract

Supplementation of the substrate of mushrooms with calcium silicate and other minerals is usually used as a preventive measure against pests and other contaminants during the production of oyster mushrooms. Little is known of the effects of this supplementation on the quality of the mushrooms produced. In the work described herein, the supplementation of oyster mushrooms was performed with 5 supplementation levels (0%, 0.5%, 1%, 2% and 4%) on mushrooms from two different locations in Brazil, the two flushes of mushrooms produced were analysed in terms of phenolic compounds, organic acids, and the antioxidant, antibacterial and antifungal activities, and finally the data was subjected to a linear discriminant analysis to understand the discrimination of the supplementation percentages. Overall, intermediate supplementation until 1% seemed to have a positive effect on the mushrooms from Mogi-das-Cruzes region, while high supplementation favoured the mushrooms from the region of Presidente Prudente. Supplementation showed positive effects on the mushrooms by increasing the production of some secondary metabolites while not showing any negative cytotoxic effects.

Influence of Iron Addition (Alone or with Calcium) to Elements Biofortification and Antioxidants in Pholiota nameko

“…However, increasing the Fe content in fruit bodies may be a cost-effective method of improving the quality of the fruiting bodies for the consumer. Recommended dietary Fe intake for adult females and males has been estimated as 9-15 and 6-11 mg day −1 , respectively [52,53]. Assuming the standard dose of mushroom consumption as 25 g DW per day, it can be calculated that a product from the Fe 15 system will provide less than 5% and 7%, while one from the Fe 15 Ca 10 system will provide almost 8% and 11% of the daily requirement for Fe, for females and males, respectively.…”

Medicinal Macrofungi as Cosmeceuticals: A Review

“…27 AOA and ABA of secondary metabolites of Pleurotus species have also been reported. 28 In vitro safety of ethanolic extracts derived from G. lucidum and P. ostreatus incorporated into base cosmetic creams was evaluated. The absence of toxicity for keratinocytes and fibroblasts in a concentration-dependent manner was revealed.…”

Screening of Antimicrobial Properties and Bioactive Compounds of Pleurotus Ostreatus Extracts against Staphylococcus Aureus, Escherichia coli, and Neisseria Gonorrhoeae

“…Mushrooms have been shown to possess a variety of nutritional and nutraceutical properties and are a source of beneficial bioactive compounds [ 1 ]. Several preliminary studies have shown that some nutraceutical mushrooms have important cardioprotective, anticancer, antiviral, antibacterial, antiparasitic, anti-inflammatory, and antidiabetic properties [ 2 , 3 ]. The Pleurotus ostreatus ( P. ostreatus ) mushroom is known to have pharmacologically active properties involved in several cellular mechanisms [ 4 ].…”

“…Studies have shown that the combination of naturally occurring compounds derived from mushrooms and regularly used antibacterial drugs may represent a revolutionary strategy against illnesses brought on by bacteria that are multidrug-resistant [ 20 , 21 ]. Mushroom-derived polyphenolic compounds, such as flavonoids or phenolic acids, have been shown to have antimicrobial properties against a variety of microorganisms, are capable of making multidrug-resistant strains susceptible to bactericidal or bacteriostatic antibiotics, and are therefore promising natural antimicrobial agents [ 3 , 13 , 22 ]. More research into bioactive compounds derived from natural sources such as bacteria, fungi, and plants that are effective for treating pathogenic bacteria that are resistant to present treatment drugs would be very advantageous [ 23 ].…”