The Fruit-body Formation in <i>Collybla velutipes</i> Induced by the Lower Temperature Treatment of One Short Duration

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The fruit-body formation was studied using a strain of Collybia velutipes. When one short duration of lower temperature was given in the early period of incubation at constant 25°, the fungus was induced primordia formation of the fruit-body, while on the mycelium without being exposed to any lower temperature it did not occur. The minimal duration of lower temperature was 2 days at 5° and 10°, and half a day at 15° for the fruiting. The growth of fruit-body was vigorous when kept at 15° or at alternating room temperature between 5° and 20°, while at 25° it was much inhibited. The favourable temperature for the initiation and the growth of the fruit-body was unfavourable for the mycelial growth.