BIOL 4250 Lecture Notes - Lecture 9: Discomycetes, Ascocarp, Sclerotiniaceae
30 Dec 2019
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Apothecium: ascocarp with asci exposed at maturity. Perithecium: apical pore through which ascospores are released. Cleistothecium: completely enclosed with no preformed opening. Pseudothecium: ascocarp with asci formed in cavity within stromatic tissue. Divided into two groups based on mode of ascus dehiscence. Has pore or slit through which ascospores are released. Operculum: where ascospores are released due to osmotic pressure. Consist of different types of fungal groups: Lichen (the biggest group in the discomycetes) Plant pathogens: sclerotiniaceae species cause brown rot of stone fruits and diseases of veggies and flowers. Endophytes: fungi that grow inside the plant. Ectomycorrhizae: associated with trees, are culturable and grows around roots/between cortical cells but never penetrates the cells. Some fungi are associated with disturbances in the environment: Has operculate asci that can be apical or subapical. These fungi make their own apothecia that is large and conspicuous. Peziza species: cup-shaped with 8 spored asci. Have amyloid rxn in tips (blueing in iodine)
