3Deuteromycota (not pictured) We will study four phyla of fungi classified by their structure and method of reproductionZygomycotaAscomycotaBasidiomycotaDeuteromycota (not pictured)Slime molds
4Characteristics of all fungi HeterotrophsEukaryoticMulticellular (except yeast)Cell wall made of chitinExternal digestion of foodMain body is haploidFungi can beDecomposers (saprobes)ParasitesCarnivoresMutualistic (beneficial)
5Did you know that each year the Mycological Society of San Francisco hosts one or two mushroom shows (traditionally called 'fungus fairs'). At the show you can see hundreds of species of fungi on display along with exhibits on ecology, mycophagy, toxicology, and cultivation. There is a fungus fair!
6What is there to like about Fungi? A LOT!DecomposersSymbiosisFood
8Edible fungi Giant puff ball Wild mushrooms To prevent mushroom poisoning, mushroom gatherers need to be very familiar with the mushrooms they intend to collect, including knowledge of the toxic species that look similar to these edible species. Mushroom poisoning (toxins) initially cause severe abdominal cramping, vomiting, and watery diarrhea, and then lead to liver and kidney failure. Therapy is aimed at decreasing the amount of toxin in the body.
9Structure of fungi Filaments = hyphae All hyphae together = mycellium Reproductive structure = fruiting body
10Reproduction in fungiAsexual = hyphae breaking off or production of sporesSexual = + and – mating types meet. Each forms a gametangium. The haploid nuclei fuse and form a diploid zygote. Meiosis then forms haploid nuclei.
11Haploid nuclei formed in gametangia + and – mating types come togetherNuclei fuse to form diploid zygote
12Phylum ZygomycotaCommon moldsIncludes black bread mold
13Zygospores = sporesformed in sexualreproductionSEXUALSporangiumproducessporesSporangiophore holds upsporangiumStolon = stem like hyphaeASEXUALRhizoid = root like hyphae