Summary
The genetical control of basidiospore production by sporophores of the fungus Coprinus congregatus was studied. This species is characterized by a bipolar compatibility control, and homokaryons with complementary alleles A1 and A2 can be distinguished apart. We confirmed that the “pale mushroom” phenotype of the fungus is determined by a nuclear gene symbolized pal. This gene also controls a “sporeless” character and segregates independently of the mating-type locus. Dikaryons homoallelic for the pal − allele produce typical “pale” and “sporeless” sporophores, while heteroallelic (pal +, pal −) and homoallelic (pal +, pal +) dikaryons produce normal or almost normal sporulating sporophores. In order to segregate homokaryons homoallelic for the pal gene (A1, pal −; A1, pal +, A2, pal −; A2, pal +), the following protocols were used: (a) the dikaryotization of stock homokaryons containing the pal + allele and of each mating type, A1 or A2, by dikaryotic mycelia homoallelic for the pal − allele; (b) the culturing of homokaryotic mycelia issuing from the germination of basidiospores from sporophores produced by dikaryotic mycelia heterokaryotic for the pal gene; (c) the culturing of mycelia grown from protoplasts obtained from dikaryons homoallelic for the pal − allele (D6 strain), and from homokaryons heteroallelic for the pal gene (H8), or homoallelic for pal #x002B;+ allele (H7). These techniques enabled us to segregate homokaryons of the four types defined above and were indispensable in the segregation of the pal − homoallelic homokaryons as no basidiospores were produced by typical “pale” mushrooms.
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References
Brunswik H (1924) Untersuchungen über die Geschlechts- und Keruverhältnisse bei der hymenomyzetengattung Coprinus. Fischer, Jena
Buller AHR (1909) Researches on fungi, vol 1; (1922) vol 2; (1924) vol 3. New edn (1958). Hafner, New York
Davis B (1985) Factors influencing protoplast isolation. In: Fungal protoplasts. Application in biochemistry and genetics. (Mycological series vol 6) Dekker, New York, pp 45–71
Lange M (1952) Species concept in the genus Coprinus. Dan Bot Ark 14:1–164
Manachère G (1966) Asservissement à une nyctipériode de la fructification de Coprinus congregatus Bull, ex Fr. en cultures éclairées. C R Acad Sci (Paris) Sér D 262:482–484
Manachére G (1970) Recherches physiologiques sur la fructification de Coprinus congregatus Bull, ex Fr.: action de la lumière, rythmes de production de carpophores. Ann Sci Nat Bot Biol Vég 11:1–95
Miyake H, Tanaka K, Ishikawa T (1980) Basidiospore formation in monokaryotic fruiting bodies of a mutant strain of Coprinus macrorhizus. Arch Microbiol 126:207–212
Moore D (1975) Production of Coprinus protoplasts by use of chitinase or helicase. Trans Br Mycol Soc 65:134–136
Robert JC (1971) Effet favorable d'une période froide sur la maturation de carpophores de Coprinus congregatus Bull, ex Fr. inhibés par un éclairement continu. C R Acad Sci (Paris) Sér D 273:154–157
Robert JC, Durand R (1979) Light and temperature requirements during fruit-body development of a basidomycete mushroom, Coprinus congregatus. Physiol Plant 46:174–178
Ross IK (1982) The genetic basis for the meiotic disorder of Coprinus congregatus. Curr Genet 5:53–56
Takemaru T, Kamada T (1972) Basidiocarp development in Coprinus macrorhizus. I. Induction of developmental variations. Bot Mag 85:51–57
Tani K, Kuroiwa T, Takemaru T (1977) Cytological studies on sporeless mutant in the basidiomycete Coprinus macrorhizus. Bot Mag 90:235–245
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Bastouill-Descollonges, Y., Manachère, G. Control of basidiospore production by a nuclear gene in the fungus Coprinus congregatus . Sexual Plant Reprod 3, 103–108 (1990). https://doi.org/10.1007/BF00198853
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DOI: https://doi.org/10.1007/BF00198853