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Changes of Enzyme Activities and Compositions of Abnormal Fruiting Bodies Grown Under Artificial Environmental Conditions in Pleurotus ostreatus

Summary

This research investigated how different growing conditions affect the development and biochemical composition of oyster mushrooms. The study found that when mushrooms are grown outside their optimal temperature and humidity ranges, they develop abnormal shapes and show significant changes in their chemical makeup. This has important implications for mushroom cultivation and quality control. Impacts on everyday life: • Helps mushroom farmers understand how to maintain optimal growing conditions • Contributes to improving commercial mushroom quality and yield • Provides insight into how environmental factors affect food crop development • Helps explain why mushrooms may develop unusual shapes in home cultivation • Aids in developing better mushroom cultivation practices

Background

Pleurotus ostreatus (oyster mushroom) is a major commercial mushroom in Korea that has been cultivated since the 1980s. Despite increasing cultivation areas, yields and quality are limited due to irregular environmental conditions and bacterial diseases. Many abnormal fruiting bodies that develop during cultivation are caused by physiological disorders from unfavorable growing environments rather than disease.

Objective

This study aimed to investigate the biochemical changes and determine the factors causing changes in enzyme activities and compositions of abnormal fruiting bodies of Pleurotus ostreatus grown under different artificial environmental conditions.

Results

Enzyme activities were higher in normal mushrooms compared to abnormal types. Glucanase and chitinase activities decreased when temperatures were above or below the optimal cultivation temperature (13-16°C). Significant differences were found in biochemical compositions between normal and abnormal mushrooms, including variations in sugar contents, amino acids, and fatty acids. Abnormal mushrooms showed lower amino acid content levels compared to normal specimens.

Conclusion

The study demonstrated that unfavorable environmental conditions during cultivation caused significant changes in the biochemical composition and enzyme activities of P. ostreatus fruiting bodies, resulting in abnormal morphological development. Temperature and humidity conditions outside the optimal range led to decreased enzyme activities and altered biochemical compositions.
  • Published in:Mycobiology,
  • Study Type:Laboratory Research,
  • Source: 10.4489/MYCO.2005.33.1.030
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