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#fungal dispersal

2 public questions tagged with this topic.

Fungi Classification

Airborne dispersal in Rhizopus stolonifer mainly occurs through

Rhizopus stolonifer asexual reproduction relies on production of numerous haploid sporangiospores within spherical sporangium atop sporangiophore lifted above mycelium. Upon maturation sporangial wall ruptures due to dehydration, increased turgor and columella collapse releasing thousands of dry spores into air currents allowing distant colonization. Airborne dispersal allows colonization of fresh bread, fruits and dung across environments. Ascospores occur in sac fungi inside asci, basidiospores in club fungi on basidia, zoospores require water and motile flagella. Hence airborne spread in bread mold chiefly mediated by sporangiospores representing non-motile mitospores adapted for wind transport.

Ref: Campbell Biology 12th ed., Chapter 31: Rhizopus Sporangiospores Airborne Dispersal; NCERT Class 11 Sporangiospores; NCBI Mucor Dispersal

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Fungi Classification

Which fungal spore is motile and commonly found in freshwater fungi?

Zoospores are wall-less, flagellated motile spores requiring free water for dispersal and chemotaxis, common in aquatic fungi particularly Chytridiomycota, Blastocladiomycota and some Neocallimastigomycota inhabiting freshwater ponds, streams and moist soils rich in organic debris. Propelled by posterior whiplash flagellum utilizing ATP, they chemotactically locate substrates like pollen, chitin or keratin before encysting. Chlamydospores, sporangiospores and oidia non-motile, adapted for aerial or substrate dispersal via wind. Therefore motile freshwater fungal spore matches zoospore, reflecting retention of ancestral opisthokont flagellar apparatus lost in terrestrial Dikarya.

Ref: Campbell Biology 12th ed., Chapter 31: Zoospore Motile Freshwater Fungi; NCERT Class 11 Fungi Motile Spores; NCBI Chytrid Zoospores Biology

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