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Sclerotium rolfsii This fungus produces no spores, but makes large sclerotia. This is a plant pathogen that causes white mold of peanuts. (mycelia sterilia) |
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Aspergillus clavatus Produces a powdery grey-green colony with club-shaped conidiophores. |
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Aspergillus nigra Forms dark colonies consisting of large club-like conidiophores covered in phialides and spores. |
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Geotrichum Thallic conidia (arthospores) arise from pre-existing hyphae. Hyphae fragment to form these thin-walled thallic conidia. |
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Penecillium chrysogenum Forms branched conidiophores with conidia-producing phialides at the tips. |
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Penecillium claviforme It has conidiophores united at the base to form large structures called synnemata. |
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Alternaria Produces phaeodictyospores: large conidia with transverse and longitudinal sections. |
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Curvularia This fungus produces phaeophragmospores. |
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Thielaviopsis 2 conidia types: (1) thick-walled thallic chlamydospores and (2) thin-walled blastic endoconidia produced from phialides. A common soil-inhabiting pathogenic fungus |
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Epicoccum nigrum This fungus produces conidia in masses called sporodochia. Condia are dark and multicellular. |
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Colletotrichum This plant pathogenic fungus produces lesions called acervuli. The acervuli have dark sterile hyphae called setae that protude from the surface. |
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Dipodascus Saprobic ascomycete found growing in sap Forms limited mycelium and appears yeast-like in culture. Produces large asci containing large number of ascospores. |
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Schizosaccharomyces octosporus A fission yeast (reproduces asexually by fission) produces asci with 8 spores |
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Taphrina deformans plant pathogen that causes peach, oak leaf curl naked asci on both surfaces of infected leaves |
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Emericella nidulans Sexual stage of Aspergillus 1. cleistothecia--surrounded by distinctive cells called (2.)Hulle cells 3. reddish ascospores released from cleistothecia |
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Talaromyces Sexual stage of Penecillium 1. culture 2, 3. cleistothecia |
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Eurotium Sexual stage of Aspergillus The yellow/brown spheres are cleistothecia. The asci and ascospores are difficult to distinguish. |
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Phylactinia cleistothecia |
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Microsphaera cleistothecia |
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Sordaria top : perithecia bottom : squashed perithecia releaseing asci and ascospores |
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Chaetomium Perithecia covered with distictive wavy hairs. |
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Xylaria 1. Pieces of finger-like fungal stroma (dead man's fingers). Perithecia are embedded at edge of the stroma 2. and 3. Stained perithecia in stroma section |
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Hypoxylon 1. black fungal tissue on wood 2. necks of perithecia protrude above stromal surface |
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Daldinia Masses of fungal stroma. Concentric layers of stroma (at arrow). Perithecia produced at stromal surface. |
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Claviceps purpurea 1. stroma and stromal section 2. perithecium in stroma with long, slender ascospores 3. sclerotia on a head of rye |
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Cordyceps A fungal pathogen of insects and other fungi. 1. on scale insect 2. C. capitata stroma arising from the fruiting body of another fungus. |
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Morchella 1. morels; edible. form ectomycorrhize with plants 2. asci and ascospores |
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Helvella apothecia false morels--poisonous |
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Urnula apothecia are cup-like |
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Paxinia cup-like apothecia with stalks |
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Tuber These are truffles. These truffles are mycorrhizal with pecans. |
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Monilinia fructicola Top: peach mummies Bottom: apothecia |
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Rhizopus black bread mold 1. sporangia; columella surrounded by sporangiospores 2. rhizoids 3. zygospores in various stages. suspensors (remains of gametangia) visible |
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Phycomyces 1. Long metallic green sporangiophore, grows towards light. Has tiny black sporangium at tip 2. Heterothallic Phycomyces make a line of zygospores when they meet, forming gametangia and zygospores 3. zygospores |
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Cunninghamella Makes branched sporangiophores with swollen tips. The tips are covered with many 1-spored sporangia. |
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Thamnidium 1. Produces large multi-spored sporangia at tip and smaller sporangiola (with a few spores) each branching off main sporangiophore 2. Culture |
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Syncephalastrum Produces merosporangia terminates in a swollen head covered with slender, elongated merosporangia--a few spores in single file |
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Mycotypha 1. Sporangia in culture 2. sporangiophore. Looks like a miniature cattail. Tip is elongated, covered with 1-spore sporangia |
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Entomphthora E. muscae on horsefly insect pathogen cluster of conidiophores or sporangiophores on dead fly |
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Albugo Top : Oospores (stained red) in Oogonia in an infected leaf. Middle: Rust-like pustules on Morning glory leaf. Bottom: sporangiophores with chains of sporangia. The sporangia give rise to zoospores |
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Saprolegnia 1. Elongate terminal zoosporangia. 2. Terminal sporangia (zoosporangium) filled with zoospores. 3. Oogonia with oospores. |
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