Shokubutsugaku Zasshi
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
Genetical Studies on Fungi VIII
on the Mating System of Psilocybe coprophila Fr
Tsuneo TAKEMARU
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1959 Volume 72 Issue 851 Pages 215-219

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Abstract

The mating system of Psilocybe coprophila was analyzed, using K-and T-stocks. As shown in Tables 1a and 2, in legitimate matings, clamps were observed microscopically both in the contact zone between two mycelia and on either side of it. Clamps were also found in all common B-factor matings, but in these pairings the formation of clamps was restricted to the contact zone only. Therefore, when only the contact zone is examined for clamps, a bipolar mating pattern is obtained. However, when the mycelia on either side of it are also tested for clamps, tetrapolarity is unmasked.
All matings where clamp-bearing hyphae had been observed were tested for their capacity to produce fruit-bodies under the same culture conditions. The same test was also done for individual monosporous mycelia. Some of the mycelia gave rise to haploid fruit-bodies bearing ample basidiospores, all of which were of the same mating type as the parent mycelia. As shown in Table 1b, perfectly developed fruit-bodies with abundant spores were obtained not only in all legitimate matings but also in some common B-factor matings. The fruit-bodies from legitimate matings produced spores of all four mating types; whereas, well-developed fruit-bodies from common B-factor matings produced only spores of the two parental types (Table 3b).
Pairings between the monosporous mycelia derived from common B-factor matings showed bipolar pattern, where clamps were found only in the contact zone, but never on either side of it (Table 3 a).
Barrages are irregularly manifested in common A-factor matings, in common B-factor matings, and in other matings (Tables 1a and 2). Thus, the barrages in this fungus seem to be of haphazard appearance but not of heritable characters.

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© The Botanical Society of Japan
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