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Conidia (spores) of the deuteromycotan fungus, Alternaria alternata (FRIES,1832) KEISSLER,1912. The conidia are obclavate (shaped like a bowling pin) and form single file chains as seen here. The spores have both longitudinal and horizontal septae. Each conidium tapers into a narrow rounded protuberance. Alternaria digests cellulose and is commonly found on dead grasses. Some species are plant pathogens causing "early" potato and tomato blight and leaf rot. The Irish potato famine of 1845-1849 was due to inection by a different fungus, Phytophthora infestans which causes "late" blight.These specimens of A. alternata were found at the margins of a slow-moving freshwater stream in Boise, Idaho.Since A. alternata is terrestrial and not aquatic, the water was probably contaminated by airborne conidia.Phase contrast.
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Mushroom Observer Image 42959: Alternaria alternata (Fr.) Keissler
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Mushroom Observer Image 201698: Pleospora herbarum (Pers.) Rabenh.
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Mushroom Observer Image 861849: Alternaria papavericola Woudenb. & Crous
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Conidia (spores) of the deuteromycotan fungus, Alternaria alternata (FRIES,1832) KEISSLER,1912. The conidia are obclavate (shaped like a bowling pin) and form single file chains as seen here. The spores have both longitudinal and horizontal septae. Each conidium tapers into a narrow rounded protuberance. Alternaria digests cellulose and is commonly found on dead grasses. Some species are plant pathogens causing "early" potato and tomato blight and leaf rot. The Irish potato famine of 1845-1849 was due to inection by a different fungus, Phytophthora infestans which causes "late" blight.These specimens of A. alternata were found at the margins of a slow-moving freshwater stream in Boise, Idaho.Since A. alternata is terrestrial and not aquatic, the water was probably contaminated by airborne conidia.DIC
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Mushroom Observer Image 42960: Alternaria alternata (Fr.) Keissler
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Longitude (deg): -5.2. Latitude (deg): 50.0. Longitude (deg/min): 5ð 20' W. Latitude (deg/min): 50ð 0' N. Vice county name: West Cornwall. Vice county no.: 1. Country: England. Stage: Anamorph. Associated species: Spegularia. Identified by: Malcolm Storey. Comment: Stemphylium state on dead lower leaves of Spurrey after keeping in fridge for a week. Other taxa shown: Spherical cells are sporangia of Albugo lepigoni (contaminant). Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.
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Longitude (deg): -1.2. Latitude (deg): 51.4. Longitude (deg/min): 1ð 10' W. Latitude (deg/min): 51ð 20' N. Vice county name: Berks. Vice county no.: 22. Country: England. Stage: Anamorph. Identified by: Malcolm Storey. Comment: growing on wallpaper in cupboard on outside wall near blocked drainpipe. Category: standard photograph or close-up. Photographic equipment used: Nikon Coolpix 950.
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Longitude (deg): -2.4. Latitude (deg): 50.5. Longitude (deg/min): 2ð 30' W. Latitude (deg/min): 50ð 40' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Stage: Anamorph. Associated species: Griselinia littoralis. Identified by: Malcolm Storey. Comment: Stemphylium state hypophyllous on dead leaf tip of Griselinia littoralis. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS1000D dSLR and Meiji microscope with x2.5 projection eye-piece. .
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Longitude (deg): -2.0. Latitude (deg): 50.8. Longitude (deg/min): 2ð 0' W. Latitude (deg/min): 50ð 50' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Stage: Conidiospore(s). Associated species: Lolium. Identified by: Malcolm Storey. Comment: on old dead rye grass inflorescence. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS1000D dSLR and Axioskop microscope with "2.5" projection eye-piece.
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This photomicrograph shows a chain of conidia of a Alternaria sp. fungus, which can be a cause of phaeohyphomycosis.Created: 1955
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This was a case of phaeohyphomycosis of subcutaneous tissue due to the fungus Curvularia harveyi.Created: 1973
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This photomicrograph shows a chain of conidia of a Alternaria sp. fungus, which can be a cause of phaeohyphomycosis.Created: 1955
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This was a case of phaeohyphomycosis of subcutaneous tissue due to the fungus Curvularia harveyi.Created: 1973
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Longitude (deg): -5.2. Latitude (deg): 50.0. Longitude (deg/min): 5ð 20' W. Latitude (deg/min): 50ð 0' N. Vice county name: West Cornwall. Vice county no.: 1. Country: England. Stage: Anamorph. Associated species: Spegularia. Identified by: Malcolm Storey. Comment: Stemphylium state on dead lower leaves of Spurrey after keeping in fridge for a week. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.
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Longitude (deg): -1.2. Latitude (deg): 51.4. Longitude (deg/min): 1ð 10' W. Latitude (deg/min): 51ð 20' N. Vice county name: Berks. Vice county no.: 22. Country: England. Stage: Anamorph. Identified by: Malcolm Storey. Comment: growing on wallpaper in cupboard on outside wall near blocked drainpipe. Category: standard photograph or close-up. Photographic equipment used: Nikon Coolpix 950.
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Longitude (deg): -2.4. Latitude (deg): 50.5. Longitude (deg/min): 2ð 30' W. Latitude (deg/min): 50ð 40' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Stage: Anamorph. Associated species: Griselinia littoralis. Identified by: Malcolm Storey. Comment: Stemphylium state hypophyllous on dead leaf tip of Griselinia littoralis. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS1000D dSLR and Meiji microscope with x2.5 projection eye-piece. .
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Longitude (deg): -2.0. Latitude (deg): 50.8. Longitude (deg/min): 2ð 0' W. Latitude (deg/min): 50ð 50' N. Vice county name: Dorset. Vice county no.: 9. Country: England. Stage: Conidiospore(s). Associated species: Lolium. Identified by: Malcolm Storey. Comment: on old dead rye grass inflorescence. Category: microscope photograph. Image scaling: highly magnified. Photographic equipment used: Canon EOS1000D dSLR and Axioskop microscope with "2.5" projection eye-piece.
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This photomicrograph shows a chain of conidia of a Alternaria sp. fungus, which can be a cause of phaeohyphomycosis.Created: 1955
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This photomicrograph shows conidiophores and conidia of the fungus Curvularia harveyi.Created: 1973
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Longitude (deg): -5.2. Latitude (deg): 50.0. Longitude (deg/min): 5ð 20' W. Latitude (deg/min): 50ð 0' N. Vice county name: West Cornwall. Vice county no.: 1. Country: England. Stage: Anamorph. Associated species: Spegularia. Identified by: Malcolm Storey. Comment: Stemphylium state on dead lower leaves of Spurrey after keeping in fridge for a week. Other taxa shown: Spherical cells are sporangia of Albugo lepigoni (contaminant). Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.