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Volume 14 Part 1 Article 35
Year 1995
Title: Growth promotion of Agaricus bisporus mycelium by Scytalidium thermophilum and C0₂
Authors: G. Straatsma, T.W. Olijnsma, L.J.L.D. van Griensven and H.J. M. Op den Camp

Abstract:

Literature data on growth promotion of Agaricus bisporus mycelium by Scytalidium thermophilum and by CO₂ were critically evaluated to make clear whether both effects are distinct or mutually replacable. Some additional experiments were done. Effects on the duration of the adaptation period of growth and on the rate of extension after adaptation were distinguished. The absence of CO₂ hampered growth of A. bisporus, mainly prolonging the adaptation period of growth. At the optimal CO₂ level, in the absence of S. thermophilum, the extension rate Kr of A. bisporus is 4 mm.d^-1. At this CO₂ level, S. thermophilum induces an increase in extension rate to 8 mm.d^-1. The effect of S. thermophilum and CO₂ are distinct. Growth promotion by S. thermophilum is not caused by its respiratory CO₂ and further research to elucidate the nature of the stimulatory effect is needed.

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