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Edit Comment Close Premium member Presentation Transcript Filamentous fungi - review and Oomycetes: Filamentous fungi - review and Oomycetes Lecture 3Four phyla of fungi: Four phyla of fungi Chytridiomycota - no sexual spore Zygomycota - zygospore Ascomycota - ascospore Basidiomycota - basidiosporeAscomycota: AscomycotaBotrytis cinerea - a fungus -causes grey mold: Botrytis cinerea - a fungus -causes grey moldPowdery mildew of cucumber: Powdery mildew of cucumberEye spot disease of strawberry Ramularia grevilleana, Mycosphaerella fragariae: Eye spot disease of strawberry Ramularia grevilleana, Mycosphaerella fragariaeCanker, Nectria galligena: Canker, Nectria galligenaWilts caused by Fusarium oxysporum: Wilts caused by Fusarium oxysporum Wilt of field grown melon caused by F. ox. formae speciales melonis Darkened vascular tissue of cucumber caused by F. ox. f.sp. cucumerinumCharacteristics of Basidiomycota: Characteristics of Basidiomycota Mycelium is septate Septa are perforated - sometimes with dolipore (doughnut shaped)Basidiomycetes have clamp connections: Basidiomycetes have clamp connectionsFly agaric (flugsvamp): Fly agaric (flugsvamp)Stem rust of wheat: Stem rust of wheatAecia on barberry: Aecia on barberryRust of raspberry: Rust of raspberryRust of rose: Rust of roseRhizoctonia solani: Rhizoctonia solani It is a basidiomycete; teliomorph (Thanatephorus cucumeris) is rare. Has very characteristic mycelium; typical of basidiomycete. Differentiated into anastomosis groups (AG) (fusion of hyphae only occur if same anastomosis group)Corn smut: Corn smutCorn smut: Corn smutCorn smut: Corn smutThe disease cycle of corn smut: The disease cycle of corn smutOomycota: Oomycota They are very different from true fungi: Cell walls have cellulose and glucans. Hyphae have no cross walls (septae). Spore types: Oospore = resting spore, sexual spore Zoospores, zoosporangia = asexual spores Examples: Pythium -seed rot, damping off, root rot Bremia, Peronospora, Plasmopara - downy mildewsOomycetes belong to Chromista: Oomycetes belong to ChromistaDifferent types of diseases caused by Oomycetes: Different types of diseases caused by OomycetesLate blight of potato, caused by Phytophthora infestans: Late blight of potato, caused by Phytophthora infestansThe disease cycle of potato late blight (Phytophthora infestans): The disease cycle of potato late blight (Phytophthora infestans)Mature sporangium: Mature sporangiumThere are 8-10 zoospores per sporangium: There are 8-10 zoospores per sporangiumZoospores are released: Zoospores are releasedOne zoospore left…: One zoospore left…Zoospores germinate: Zoospores germinateSee movie of zoospore release: See movie of zoospore releaseGrass lawn attacked by Pythium ultimum (damping off): Grass lawn attacked by Pythium ultimum (damping off)Life cycle of Pythium ultimum: Life cycle of Pythium ultimumDowny mildew of grape: Downy mildew of grapeAttack of grape berries: Attack of grape berriesSymptoms of grape downy mildew (Plasmopara viticola): Symptoms of grape downy mildew (Plasmopara viticola)Disease cycle of Plasmopara viticola, downy mildew of grape: Disease cycle of Plasmopara viticola, downy mildew of grapeZoospores of downy mildew of hop, landing on leaf and infecting: Zoospores of downy mildew of hop, landing on leaf and infectingDowny mildew of onion (Peronospora destructor): Downy mildew of onion (Peronospora destructor)Downy mildew of cabbage (Peronospora parasitica): Downy mildew of cabbage (Peronospora parasitica)Tree and strawberry diseases caused by Phytophthora species: Tree and strawberry diseases caused by Phytophthora speciesStrawberry crown rot, caused by Phytophthora cactorum: Strawberry crown rot, caused by Phytophthora cactorum Oospore and sporangiaSlide44: Alnus glutinosa attacked by Alder Phytophthora Brownish red discolouration Oogonia Amphigyne two-celled antheridia Oospore Photo: Christer Olsson Alder stembaseSymptoms of Phytophthora alni ssp. uniformis on alder (Alnus glutinosa): Symptoms of Phytophthora alni ssp. uniformis on alder (Alnus glutinosa) The pathogen infects through wounds at the stembase or through the roots. The tree tops die The tree dies laterSlide46: Phytophthora ramorum, chlamydospores. (Diameter 20 – 90 µm, 52.5 – 75 µm on this slide). Often germinating with a sporangiophore. Isolat CH 180, (CBS 101328; P1357), The Netherlands, Rhododendron. Heterothallic (A1). Christer Olsson, 1/7 2002, DIA bilder You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Fungal Lecture3 Rinald Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1743 Category: Education License: All Rights Reserved Like it (1) Dislike it (0) Added: January 08, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: go2menon (18 month(s) ago) Hi Im really interested in getting ur presentation to tech my students, can u help? regards G Saving..... Post Reply Close Saving..... Edit Comment Close By: haboualy (41 month(s) ago) i need it thanks Saving..... Post Reply Close Saving..... Edit Comment Close By: hamedea (43 month(s) ago) its very good presentation Saving..... 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Edit Comment Close Premium member Presentation Transcript Filamentous fungi - review and Oomycetes: Filamentous fungi - review and Oomycetes Lecture 3Four phyla of fungi: Four phyla of fungi Chytridiomycota - no sexual spore Zygomycota - zygospore Ascomycota - ascospore Basidiomycota - basidiosporeAscomycota: AscomycotaBotrytis cinerea - a fungus -causes grey mold: Botrytis cinerea - a fungus -causes grey moldPowdery mildew of cucumber: Powdery mildew of cucumberEye spot disease of strawberry Ramularia grevilleana, Mycosphaerella fragariae: Eye spot disease of strawberry Ramularia grevilleana, Mycosphaerella fragariaeCanker, Nectria galligena: Canker, Nectria galligenaWilts caused by Fusarium oxysporum: Wilts caused by Fusarium oxysporum Wilt of field grown melon caused by F. ox. formae speciales melonis Darkened vascular tissue of cucumber caused by F. ox. f.sp. cucumerinumCharacteristics of Basidiomycota: Characteristics of Basidiomycota Mycelium is septate Septa are perforated - sometimes with dolipore (doughnut shaped)Basidiomycetes have clamp connections: Basidiomycetes have clamp connectionsFly agaric (flugsvamp): Fly agaric (flugsvamp)Stem rust of wheat: Stem rust of wheatAecia on barberry: Aecia on barberryRust of raspberry: Rust of raspberryRust of rose: Rust of roseRhizoctonia solani: Rhizoctonia solani It is a basidiomycete; teliomorph (Thanatephorus cucumeris) is rare. Has very characteristic mycelium; typical of basidiomycete. Differentiated into anastomosis groups (AG) (fusion of hyphae only occur if same anastomosis group)Corn smut: Corn smutCorn smut: Corn smutCorn smut: Corn smutThe disease cycle of corn smut: The disease cycle of corn smutOomycota: Oomycota They are very different from true fungi: Cell walls have cellulose and glucans. Hyphae have no cross walls (septae). Spore types: Oospore = resting spore, sexual spore Zoospores, zoosporangia = asexual spores Examples: Pythium -seed rot, damping off, root rot Bremia, Peronospora, Plasmopara - downy mildewsOomycetes belong to Chromista: Oomycetes belong to ChromistaDifferent types of diseases caused by Oomycetes: Different types of diseases caused by OomycetesLate blight of potato, caused by Phytophthora infestans: Late blight of potato, caused by Phytophthora infestansThe disease cycle of potato late blight (Phytophthora infestans): The disease cycle of potato late blight (Phytophthora infestans)Mature sporangium: Mature sporangiumThere are 8-10 zoospores per sporangium: There are 8-10 zoospores per sporangiumZoospores are released: Zoospores are releasedOne zoospore left…: One zoospore left…Zoospores germinate: Zoospores germinateSee movie of zoospore release: See movie of zoospore releaseGrass lawn attacked by Pythium ultimum (damping off): Grass lawn attacked by Pythium ultimum (damping off)Life cycle of Pythium ultimum: Life cycle of Pythium ultimumDowny mildew of grape: Downy mildew of grapeAttack of grape berries: Attack of grape berriesSymptoms of grape downy mildew (Plasmopara viticola): Symptoms of grape downy mildew (Plasmopara viticola)Disease cycle of Plasmopara viticola, downy mildew of grape: Disease cycle of Plasmopara viticola, downy mildew of grapeZoospores of downy mildew of hop, landing on leaf and infecting: Zoospores of downy mildew of hop, landing on leaf and infectingDowny mildew of onion (Peronospora destructor): Downy mildew of onion (Peronospora destructor)Downy mildew of cabbage (Peronospora parasitica): Downy mildew of cabbage (Peronospora parasitica)Tree and strawberry diseases caused by Phytophthora species: Tree and strawberry diseases caused by Phytophthora speciesStrawberry crown rot, caused by Phytophthora cactorum: Strawberry crown rot, caused by Phytophthora cactorum Oospore and sporangiaSlide44: Alnus glutinosa attacked by Alder Phytophthora Brownish red discolouration Oogonia Amphigyne two-celled antheridia Oospore Photo: Christer Olsson Alder stembaseSymptoms of Phytophthora alni ssp. uniformis on alder (Alnus glutinosa): Symptoms of Phytophthora alni ssp. uniformis on alder (Alnus glutinosa) The pathogen infects through wounds at the stembase or through the roots. The tree tops die The tree dies laterSlide46: Phytophthora ramorum, chlamydospores. (Diameter 20 – 90 µm, 52.5 – 75 µm on this slide). Often germinating with a sporangiophore. Isolat CH 180, (CBS 101328; P1357), The Netherlands, Rhododendron. Heterothallic (A1). Christer Olsson, 1/7 2002, DIA bilder