Abstract
White button mushrooms are greatly high perishable and can deteriorate within a few days after harvesting due to physicomechanical damage, respiration, microbial growth of the delicate epidermal structure. For that reason, the present research work was applied to evaluate the effect of chitosan combination with nano-coating treatments on physicochemical parameters and microbial populations on button mushrooms at chilling storage. Nano coating with the addition of nisin 1% (CHSSN/M) established the minimum value for weight loss 12.18%, maintained firmness 11.55 N, and color index profile. Moreover, O2% rate of (CHSSN/M) mushrooms was the lowest at 1.78%; while the highest rate was reported for CO2 24.88% compared to the untreated samples (Control/M) on day 12. Both pH and total soluble solid concentrations increased during storage. Results reported that the (CHSS/M) mushroom significantly (P < 0.05) reduced polyphenol oxidase activity (24.31 U mg−1 Protein) compared with (Control/M) mushrooms that increased faster than the treated samples. (CHSSN/M) treatment was the most efficient in the reduction of yeast and mold, aerobic plate microorganisms (5.27–5.10 log CFU/g), respectively. The results established that nano-coating film might delay the aging degree and accompany by marked prolongation of postharvest mushroom freshness.
Highlights
White button mushrooms are greatly high perishable and can deteriorate within a few days after harvesting due to physicomechanical damage, respiration, microbial growth of the delicate epidermal structure
The minimum value was established for chitosan/nano-silica/nisin mushrooms (CHSSN/M) 12.18% and chitosan/nano-silica mushrooms (CHSS/M) 12.72% mushrooms that can perhaps be due to nano-coating and the addition of nisin as it assists in retaining the respiration and regulating enzyme functions[14]
The finding is in agreement with Oz et al.[21] who reported that color is influenced by enzyme oxidations, microbial population, senescence, and loss of nutrients. (ΔE) was > 2, which means a significant color difference
Summary
White button mushrooms are greatly high perishable and can deteriorate within a few days after harvesting due to physicomechanical damage, respiration, microbial growth of the delicate epidermal structure. The major object of the current research was to estimate the combined effect of chitosan, nisin, and silicon dioxide nanoparticles coating treatments on the shelf-life enhancement of whole button mushroom stored at 4 °C, investigating some physicochemical parameters and microbial populations to indicate the mushroom quality. Compared with the (Control/M) sample, (CHSSN/M) mushrooms reported a higher firmness value than other treatments during the storage.
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