PBIO 117 Lecture Notes - Olpidium Brassicae, Leaf Curl, Canker

• School: University of Vermont
• Department: Plant Biology
• Course: PBIO 117
• Professor: Terrence P.Delaney

Document Summary

Disease symptoms/ signs of fungal pathogens: necrotic. Damping off scab: abnormal growth leaf curl. Post-harvest diseases rust smut- known for reddish signs of disease (usually spores) Phylum chytridiomycota: lack a true mycelia, have zoospores ( swimmers , loco mote in water w/ a flagella, may be saprotrophs or plant pathogens. Water is important for dispersal: found in water/soil, ex. olpidium brassicae. Phylum zygomycota: mycelia w/o cross walls (non-septate, non-motile spores, saprophytes or weak parasites, ex. Rhizopus (bread mold: heterothallic 2 or more mating types. Imperfect fungi- no sexual cycle known: causal agent of verticilium wilt, attacks 300+ dicot species (tomato, cotton, some trees, symptoms: Ascomycetes (sac fungi: sexual spores: ascospores (primary inoculum, asexual spores: conidia (secondary inoculum, fruiting bodies: Parathesium- around asci surrounded but not closed in (flask like) Pseudothesium- false contains host tissue, not entirely fungal. Apothesium- away , satellite dishes , inner surface is lined with asci.