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Solving a Puzzle Piece by Piece: Sexual Development in the Basidiomycetous Fungus Schizophyllum commune
Author(s) -
Kothe Erika
Publication year - 1997
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1997.tb00630.x
Subject(s) - schizophyllum commune , biology , gene , transcription (linguistics) , genetics , pheromone , transcription factor , mating type , microbiology and biotechnology , botany , linguistics , philosophy
In the homobasidiomycete fungus Schizophyllum commune recognition of mates is based on four multiallelic genetic loci. While Aα and Aβ independently but redundantly regulate formation of clamp cells, nuclear migration is under control of the B loci Bα and/or Bβ . In the A loci two homoeodomain transcription factors, Y and Z in Aa and one yet, V in Aβ , are encoded which form acitve heterodimers only if different specificities are combined (like Y3 Z4), e.g. via mating of strains differing in Aα loci. In both Bα and Bβ , pheromone receptors and several pheromone genes habe been found. While the homoeodomain transcription factors are thougth to directly activate downstream genes, a signal transduction cascade culminating in activation of target genes is postulated for B‐regulated development. Only if both A and B pathways are turned on, fruit body formation and spore production are observed.