F0007 - Phylum Zygomycota and the new classification - Univap

Entomophthora muscaeOrdem Entomophthorales• Primary conidia germinate directlyto form hyphae, or indirectly toform secondary conidia:• Passively dispersed secondaryconidia produced on long, thinconidiophores; with sticky apicalstructure called a haptor at theconidium spex.• Forcibly discharged secondaryconidia with mechanism similar toprimary conidiaZygomycota DENR 85From O’Donnell, 1979Zygomycota DENR 86Ordem EntomophthoralesFamília Neozygitaceae(image from Bioimages)Zygomycota DENR 87Entomophthora muscae• Obligate pathogens of insects, especiallyHomoptera, and mites• Neozygites– Primary conidia discharged by papillareversion, germinate to form passivelydispersed secondary conidia with haptor onlong thin conidiophores– Resting spores dark, ornamented, with twopores; formed inside hostZygomycota DENR 88NeozygitesResting spores inthrips bodyResting sporegerminating toproduce conidiumResting spores;note two poreswhere gametangiawere attachedPrimary conidiagerminate to formpassively disperspedconidium with stickyhaptor (arrow)Ordem Mortierellales• 10% of known zygomycetes (~100 spp.)• Characterized by thin, delicate,“arachnoid-like” mycelium, zonatecolonies and garlic-like odor• Sporangiophores either acolumellate, orwith rudimentary columella• Often form chlamydosporesZygomycota DENR 89Zygomycota DENR 9015