BIO 2137 Lecture Notes - Lecture 6: Cercospora, Pezizaceae, Phytophthora Infestans
17 Jul 2014
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Keywords: fungi: characteriscs, fungal protists: oomycetes (disease), slime molds (plasmodial and cellular, true fungi. Fungi: 70000 species, molds, mushrooms, disease organisms, yeasts, traditionally placed with plants but closer to animals, subgroup: fungal protists, collection of primitive organisms and some related to algal protists, but with fungal characteristics. 700 species (aquatic and terrestrial: decomposers and parasites, grow by hyphae without cross walls (non septate) o to take nutrients o. *hyphae: thin cytoplasmic tubes, invades food substances and excrete enzymes: cellulose in cell wall (not chitin, reason why not controlled by fungicides, centrioles (like animals, large thick oopore (zygote 2n) in sexual cycle and zoospore in asexual cycle. Important in plant disease organisms: phytophthora: late blight of potato (caused irish famine, plant breeders produced 2 kinds (low genetic base), like white one without metabolites, pythium: damping off of cereals, downey mildew in grapes.
