In recent years, global consumption of edible mushrooms has increased significantly owing to their nutritional value. Among them, the white button mushroom (Agaricus bisporus) stands out not only for its dominant production volume and economic market share but also because it’s a rich source of bioactive compounds essential to human health. Recent studies have suggested that beneficial bacteria can enhance both the yield and the quality of cultivated mushrooms. This study aimed to evaluate the effects of inoculation with six bacterial treatments (control, Bacillus subtilis, Pseudomonas fluorescens, Pseudomonas putida, Azotobacter chroococcum, and a combined application of all four strains) on the yield components and nutritional and medicinalproperties of A. bisporus under a completely randomized design. The highest yield of A. bisporus and compost biological efficiency were observed in the combined bacterial treatment, showing a 15.64% increase over the control in both metrics. Although not significantly different from the other bacterial treatments, this treatment led to the highest ergosterol and total protein content in A. bisporus (3.89 mg/g dry weight and 3.14 g/100 g fresh weight, respectively). All bacterial treatments significantly increased the β-glucan content compared to the control, with the highest β-glucan level recorded in the B. velezensis inoculation treatment (9.88 g/100 g dry weight), although this increase was not statistically different from the other bacterial treatments. Overall, the application of plant growth-promoting bacteria significantly enhanced the yield performance and improved the nutritional and medicinal quality of A. bisporus.
Salehi Molkabadi R, Fatemeh Raouf Fard F. Microbial Bio-stimulants and Efficient Edible Mushroom Cultivation: Investigating the Effects of Beneficial Bacteria on the Yield and Nutritional Quality of White Button Mushroom (Agaricus bisporus). IJHST 2025; 26 (3) :219-230 URL: http://journal-irshs.ir/article-1-732-en.html