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Effect of Bacterial Volatiles on the Mycelial Growth of Mushrooms

Summary

This research explores how certain bacteria can influence mushroom growth through the production of volatile compounds. The study found that specific bacterial species can significantly enhance the growth of certain mushroom types, particularly oyster mushrooms, through the release of airborne chemicals. This discovery has important implications for mushroom cultivation and understanding natural growth processes. Impacts on everyday life: • Could lead to improved methods for commercial mushroom cultivation • May help develop more efficient and natural ways to grow edible mushrooms • Contributes to understanding how to enhance mushroom production for food industry • Could lead to more sustainable farming practices • May help reduce the use of artificial growth promoters in mushroom farming

Background

Bacteria play an important role in the life cycle of fungi by influencing morphological features, mycelial growth and fruiting body induction. However, the underlying mechanisms and species-dependence, particularly among Basidiomycota fungi, are not well understood.

Objective

To analyze the effects of seven bacterial isolates previously obtained from Pleurotus ostreatus HK35 on the mycelial growth of various mushroom species, and to investigate the impact of bacterial volatile organic compounds (VOCs) on mycelial growth.

Results

Bacterial isolates showed significant growth-promoting effects only when co-cultivated with Pleurotus species, except for P. citrinopileatus. Paenibacillus peoriae strain M48F notably induced mycelial growth in P. ostreatus (47%), P. eryngii (32%), and P. sapidus (27%) during early cultivation stages. VOCs from strain M48F induced the strongest growth of P. ostreatus (50%) and P. eryngii (20%) mycelia. The strain triggered β-bisabolene formation in co-cultivation with P. ostreatus or P. eryngii, and 2,5-diisopropylpyrazine was identified as a dominant volatile compound.

Conclusion

The study demonstrates that bacterial mycelial growth-promoting effects are significantly species-dependent, and bacterial VOCs, particularly 2,5-diisopropylpyrazine, can enhance mycelial growth in specific mushroom species.
  • Published in:Microbiological Research,
  • Study Type:Laboratory Research,
  • Source: 10.1016/j.micres.2022.127250
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