Fruiting ofLyophyllum tylicolor in plate culture on Soytoneglucose agar and urea-treated soil extract agar

Lyophyllum tylicolor, which forms mycelial basidia (and basidiospores), produced fruit-bodies when cultivated at 20°C under continuous illumination of 400–700 lux on agar plates containing Bacto-Soytone and glucose or an extract from urea-treated soil. Under these conditions, mycelial basidia were also observed on the Soytone-glucose agar, but not on the soil extract agar. In darkness, fruit-bodies and mycelial basidia were not observed on either medium. In culture on the soil extract agar, fruit-body primordia were produced at the position of the margin of the colony when it was transferred from darkness to continuous light; stipes did not elongate under illumination of ca. 2000 lux; and mycelial basidia and basidiospores, but not fruit-bodies, developed when glucose concentration in the medium was as high as 1% (w/v).