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#Basidiomycota

2 public questions tagged with this topic.

Fungi Classification

Basidiomycota are commonly known as

Phylum Basidiomycota derives name from basidium, enlarged club-shaped meiosporangium where karyogamy followed by meiosis generates haploid spores. Typically four basidiospores develop exogenously on sterigmata tips, forcibly discharged via surface tension mechanism called Buller's drop. Dikaryotic mycelium persists with clamp connections maintaining paired nuclei, extensive hyphal fusion. Basidia aggregate in macroscopic basidiocarp exemplified by familiar mushrooms, puffballs, shelf brackets, stinkhorns, plus microscopic rusts and smuts. This morphology contrasts with sac fungi producing asci internally, zygomycetes forming zygosporangia and imperfect fungi lacking observed sexual reproduction entirely.

Ref: Campbell Biology 12th ed. Chapter 31 Fungi Basidiomycota; Alexopoulos Introductory Mycology 4th ed. Basidiomycetes

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Fungi Classification

Dikarya includes which two major fungal phyla?

Dikarya subkingdom unites two largest fungal phyla Ascomycota and Basidiomycota sharing derived character: formation of dikaryotic mycelium where cells contain paired haploid nuclei from different parents maintained via clamp connections or croziers, eventual karyogamy and meiosis inside ascus or basidium for spore production. Zygomycota and Chytridiomycota lack regular dikaryon with immediate nuclear fusion. Molecular phylogeny supports Dikarya monophyly comprising approximately 98% described fungi, includes yeasts, molds, mushrooms, lichens. Recognition clarifies evolution of complex fruiting bodies and advanced genetic regulation via mating-type loci distinguishing them from early diverging lineages.

Ref: Campbell Biology 12th ed., Chapter 31: Dikarya Ascomycota Basidiomycota Clade; NCBI Fungal Phylogeny - Hibbett et al. 2007 Dikarya Monophyly; James et al.

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