5 public questions tagged with this topic.
The fungus belongs to Basidiomycetes. Karyogamy and meiosis occur in a basidium, and basidiospores are produced externally on it. Asexual spores are generally absent in this group.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Fungi - Phycomycetes Ascomycetes Basidiomycetes
Basidiomycetes possess branched, septate mycelium and generally lack asexual spores. Karyogamy and meiosis occur in a basidium, usually producing four basidiospores externally.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Fungi - Phycomycetes Ascomycetes Basidiomycetes
Phycomycetes reproduce asexually by motile zoospores or non-motile aplanospores. These spores are produced endogenously within a sporangium.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Kingdom Monera - Archaebacteria and Eubacteria
Conidia represent asexual mitospores formed externally at tips or sides of specialized hyphae called conidiophores without being enclosed in protective sac or sporangium. Conidiogenesis occurs via blastic or thallic modes producing chains or solitary spores dispersed by wind over long distances. Zoospores motile in water, sporangiospores endogenous inside sporangium, zygospores sexual resting spores requiring mating. Conidia abundant in Penicillium, Aspergillus enabling rapid clonal colonization of dry habitats. No meiosis involved, genotypes identical to parent, contrasting with meiotic ascospores and basidiospores. External formation optimizes airborne dispersal.
Ref: Campbell Biology 12th ed., Chapter 31: Conidia Exogenous Asexual Spores; NCERT Class 11 - Conidiophores; NCBI Asexual Sporulation
The NCERT text details the reproduction of Ascomycetes by explaining that their asexual spores are known as conidia. A critical distinguishing feature of conidia is that they are produced 'exogenously' (on the outside, rather than enclosed in a sac) at the tips of highly specialized structural hyphae known as conidiophores. Upon dispersal and germination, these conidia quickly develop into a new mycelium.
Ref: NCERT Class 11 Biology > Chapter 2: Biological Classification > 2.3 Kingdom Fungi
