Abstract
Collybia velutipes is known to develop primordia as well as stipes in darkness while the growth of the pileus is greatly stimulated even by weak light (Akai 1940, Plunkett 1953, 1956, Aschan 1954, Takemuru 1954). In those cases where similar effects in other basidiomycetes have been studied in respect to their wave‐length dependence blue light has generally been found most effective (see Marsh et al. 1959). The present author has observed well developed pilei in (Collybia cultures receiving only occasional illumination from a weak incandescent lamp. Such irradiance contains a rather low proportion of blue light, so that the question arose whether this fungus might deviate from the rule.
Published Version
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