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Termitomyces sp. associated with the termite Macrotermes natalensis has a heterothallic mating system and multinucleate cells

Författare:
Publiceringsår: 2005
Språk: Engelska
Sidor: 314-318
Publikation/Tidskrift/Serie: Mycological Research
Volym: 109
Nummer: 3
Dokumenttyp: Artikel
Förlag: Elsevier B.V. / The British Mycological Society

Sammanfattning

Fungi of the genus Termitomyces live in an obligate symbiosis with termites of the subfamily Macrotermitinae. Many species of Termitomyces frequently form fruit bodies, which develop from the fungus comb within the nest. In this study,
we determined the mating system of a species of Termitomyces associated with the South African termite Macrotermes natalensis. Termite nests were excavated and a Termitomyces sp. was isolated into pure culture from the asexual fruit
bodies (nodules) growing in the fungus gardens. For one strain, single basidiospore cultures were obtained from basidiomes growing from the fungus comb after incubation without termites. Using nuclear staining, we show that both
comb cultures and single spore cultures have multinucleate cells and that the majority of spores has a single nucleus.
However, DNA sequencing of the ITS region in the nuclear RNA gene revealed that the comb mycelium had two different ITS types that segregated in the single spore cultures, which consequently had only a single ITS type. These results unambiguously prove that the strain of Termitomyces studied here has a heterothallic mating system, with the fungus garden of the termite mound being in the heterokaryotic phase. This is the first time the mating system of a
Termitomyces species has been studied.

Disputation

Nyckelord

  • Biology and Life Sciences

Övriga

Published
Yes
  • ISSN: 0953-7562 (Print)
  • ISSN: 1469-8102 (Online)

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