Interactive Effects of Selenium, Zinc, and Iron on the Uptake of Selenium in Mycelia of the Culinary-Medicinal Winter Mushroom Flammulina velutipes

Summary

This research explored how adding different minerals (selenium, zinc, and iron) to growing conditions affects the winter mushroom’s ability to absorb and store selenium. The findings show that combining selenium with zinc dramatically increases the mushroom’s selenium content without harming its growth. This discovery has important implications for creating more nutritious mushroom products. Impacts on everyday life: • Potential for creating selenium-enriched mushroom products for better nutrition • New ways to naturally fortify foods with essential minerals • Improved understanding of how to grow more nutritious mushrooms • Possibility of developing new functional food products • More efficient methods for producing nutrient-enhanced mushrooms commercially

Background

Selenium uptake in mushroom mycelia is an important area of study for nutritional enhancement, but the interactive effects of multiple minerals on selenium accumulation have not been well studied.

Objective

To investigate whether the simultaneous presence of selenium, zinc and iron affects selenium uptake in the mycelia of Flammulina velutipes (winter mushroom/enoki) and optimize the concentrations of these minerals.

Results

The application of selenium, zinc and iron (individually, in pairs, or triads) significantly enhanced selenium accumulation in the mycelia. Maximum selenium accumulation occurred with concurrent application of selenium (60 mg L-1) and zinc (120 mg L-1), resulting in an 85-fold and 88-fold increase in selenium content compared to selenium-only treated and untreated mycelia respectively. The selenium accumulation did not negatively impact mycelial biomass growth.

Conclusion

The study demonstrated successful enhancement of selenium accumulation in F. velutipes mycelia through mineral supplementation, particularly through the synergistic effects of selenium and zinc combination. These findings have potential applications in daily nutrition and industrial production of selenium-enriched mushroom mycelia.
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