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Exogenous MnSO4 Improves Productivity of Degenerated Volvariella volvacea by Regulating Antioxidant Activity

Summary

This study shows that adding manganese sulfate to degenerated mushroom strains can restore their ability to grow and produce fruit bodies. The treatment works by improving the mushrooms’ natural defense systems against damaging free radicals and enhancing enzymes that break down the growing medium. Results showed significantly improved growth rates, shorter production times, and even allowed severely damaged strains to produce mushrooms again.

Background

Volvariella volvacea is an important edible mushroom in China with nutritional and medicinal value. Strain degeneration limits industry development, characterized by slow mycelial growth, poor matrix degradation ability, and delayed fruiting body formation. Manganese is an essential trace element and cofactor for antioxidant enzymes like Mn-SOD and MnP.

Objective

To investigate the rejuvenation effect of exogenous MnSO4 addition on degenerated V. volvacea strains by examining its impact on antioxidant activity, enzyme vigour, and productivity characteristics.

Results

MnSO4 treatment significantly increased mycelial growth rate and biomass in degenerated strains (T10: 22.3% and 27.3% increase; T19: 27.4% and 30.2% increase). Production cycle shortened by 7.9% in T10, biological efficiency increased 46%, and severely degenerated T19 regrew fruiting bodies. Antioxidant enzyme activities and antioxidant substance contents increased substantially while ROS accumulation decreased.

Conclusion

Exogenous MnSO4 effectively rejuvenates degenerated V. volvacea strains by enhancing antioxidant defense systems and matrix-degrading enzyme activities, thereby improving mycelial vigor, shortening production cycles, and restoring fruiting body formation. This provides a simple and practical method for strain rejuvenation in edible mushroom production.
  • Published in:Journal of Fungi,
  • Study Type:Experimental Study,
  • Source: PMID: 39728321
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