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#fungal biology

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Fungi Classification

Asexual spores formed externally on conidiophores are called

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

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Fungi Classification

Coenocytic hyphae are characterized by

Coenocytic hyphae lack septa throughout vegetative mycelium, resulting in large multinucleate supercell where nuclei divide via mitosis without cytokinesis producing continuous cytoplasmic mass. Cytoplasmic streaming distributes organelles and nutrients efficiently. Occasional septa may form delimiting reproductive structures or sealing injury site. This architecture characteristic of early diverging fungi like Mucoromycota and Chytridiomycota. Presence of septa defines septate hyphae, absence of nuclei incorrect as numerous nuclei present, single nucleus per cell defines uninucleate septate condition. Coenocytic condition facilitates rapid growth and bulk flow.

Ref: Campbell Biology 12th ed., Chapter 31: Coenocytic Fungi Aseptate; NCERT Class 11 - Phycomycetes Coenocytic Mycelium; NCBI Mycology

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