Mikrochirurgische Untersuchungen über die geschlechtliche Tendenz der Paarkerne des homothallischen Coprinus sterquilinus Fries

Harder, Richard

doi:10.1007/bf01916359

Cited by 22 publications

(9 citation statements)

References 1 publication

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“…The meiotic events and formation of four spores on the basidium of Amut Bmut fruit bodies resembled those observed in homothallic species, where fertile dikaryotic mycelia are formed in the absence of fusion of two compatible monokaryotic mycelia (Harder, 1926). The formation of fruit bodies by such mutant strains of heterothallic species without mating might represent a possible pathway in evolution by which homothallic species evolve from heterothallic species of Basidiomycetes.…”

Section: Recovery and Characterization Of A-and B-factor Double Mutantsmentioning

confidence: 60%

Morphogenetic Effects of Mutations at the A and B Incompatibility Factors in Coprinus cinereus

1984

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Mutated A and B incompatibility factors of Coprinus cinereus (Amut and Bmut) were recovered from fruit bodies produced on common-A and common-B heterokaryons, respectively, following mutagenesis. The Amut hyphal cells were either uninucleate or binucleate and had pseudoclamps irregularly scattered along the hyphae. The Bmut hyphal cells were predominantly uninucleate and had no clamp structures. Amut Bmut double mutants constructed from these Amut and Bmut strains were predominantly binucleate, had true clamps, and gave rise to fertile fruit bodies indistinguishable from those of wild-type dikaryons. Although these Amut Bmut strains resembled in most respects a normal dikaryon, they produced abundant oidiophores and oidia like the monokaryons. The oidia were uninucleate, and possessed the potential to grow into fertile homokaryons with the above characteristics.

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Section: Recovery and Characterization Of A-and B-factor Double Mutantsmentioning

confidence: 60%

Morphogenetic Effects of Mutations at the A and B Incompatibility Factors in Coprinus cinereus

1984

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“…Among the few other species in which homomixis has been demonstrated, with any degree of certainty, are Coprinus patouillardii (Bayman & Collins, 1990), Coprinus sterquilinus Fr. (Harder, 1926), Heterobasidion annosum (Chase et at., 1985) and Sistotrema brinkmannii (Lemke, 1969). Several members of the genus Stereum are non-outcrossing (Ainsworth, 1987) but as convincing evidence of meiosis in the basidia of Stereum sanguinolentum is lacking, it is possible that these species are actually apomictic (Rayner & Turton, 1982).…”

Section: Discussionmentioning

confidence: 99%

The breeding biology of biotypes of the witches' broom pathogen of cocoa, Crinipellis perniciosa

Griffith

Hedger

1994

Heredity

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Investigation of the breeding biology of the agaric Crinipellis perniciosa (causal agent of witches' broom disease of cocoa in South America) found that two distinct breeding strategies exist among the four known biotypes of the fungus, which are specific to cocoa (C-biotype), solanaceous hosts (S-biotype), Bixa orellana (B-biotype) and liana vines (L-biotype). The homomictic (primary homothallic) behaviour of the C-biotype was confirmed and single basidiospore isolates (SSIs) of the S-biotype and B-biotype were found to behave in a similar manner. The mycelia of most SSIs of the L-biotype did not bear clamp connections and pairings between sibling SSIs established that an outcrossing mechanism under the control of two unlinked mating type factors was operating (i.e. bifactorial heterothallism). These matings also suggested that one of the mating factors has a twogene structure. The occurrence of bi-and trinucleate basidiospores and SSIs bearing true or false clamp connections suggests that the L-biotype exhibits a limited degree of secondary homothallism.

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“…Raper also notes that a large number of basidiomycetes are homothallic but that the details of their homothallism are not known (Raper 1966). One of the basic criteria by which primary homothallism such as that of C. sterquilinus can be defined is based on the ability of a single nucleus of the dikaryophase, once isolated, to re-establish the dikaryotic condition and complete the sexual cycle (Harder 1926;Raper 1966). Since dedikaryotized mycelia isolated from C. n?yceliocephalus were unable to re-form the diltaryophase or to produce basidiocarps, this species may demonstrate secondary homothallism.…”

Section: Discussionmentioning

confidence: 99%

“…Harder (1926) and Fries and Aschan (1952) used microsurgical techniques to isolate monokaryotic cells from dikaryotic mycelia. More recently a variety of chemicals has been shown to dedikaryotize the mycelia of certain heterothallic basidiomycetes (Miles and Raper 1956;Kerruish and Da Costa 1963;and Takemaru 1964).…”

Section: Introductionmentioning

confidence: 99%

Chemical dedikaryotization of Coprinus myceliocephalus (Agaricales)

McClaren¹

1970

Can. J. Bot.

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MCCLAREN, M. 1970. Chemical dedikaryotization of Coprinus myceliocephalrrs (Agaricales). Can. J.Bot. 48: 787-790. The dikaryotic mycelium of the homothallic basidiomycete Coprinus myceliocephalrrs Lange was treated with chemicals known to induce dedikaryotization. Two monokaryotic isolates were recovered from mycelia grown for 16 weeks in 0.042y0 sodium arsenate in a solid basal medium and one isolate was recovered after 3 weeks from a liquid medium containing 0.5% cholic acid. The monokaryotic cultures did not form basidiocarps, although the dikaryotic mycelium regularly fruited in culture. Monokaryotic cultures did not revert to the dikaryotic condition nor did mating occur between the paired monokaryotic forms.

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Mikrochirurgische Untersuchungen über die geschlechtliche Tendenz der Paarkerne des homothallischen Coprinus sterquilinus Fries

Cited by 22 publications

References 1 publication

Morphogenetic Effects of Mutations at the A and B Incompatibility Factors in Coprinus cinereus

Morphogenetic Effects of Mutations at the A and B Incompatibility Factors in Coprinus cinereus

The breeding biology of biotypes of the witches' broom pathogen of cocoa, Crinipellis perniciosa

Chemical dedikaryotization of Coprinus myceliocephalus (Agaricales)

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