Ch 31 - Fungi (1 slide per page)-1

Forager worker ants bring leaf fragments to nest 2

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Unformatted text preview: zed delicacy 58 Symbiosis: Basidiomycota fungus & Termites Symbiosis: Basidiomycota fungus & Leaf cutter ants 59 41 ant spp in 2 genera (Atta and Acromyrmex) Symbiosis: Basidiomycota fungus & Leaf cutter ants 60 1. Forager worker ants bring leaf fragments to nest 2. Nest workers further process to make mulch 3. Feed mulch to fungus or inoculate with fungal spores (to grow more fungus) 4. Ants and larvae eat fungus Symbiosis: Basidiomycota fungus & Leaf cutter ants 61 1. If a particular leaf is bad for fungus they stop using that leaf. 2. Have “crypts” on exoskeleton to grow bacteria which: - kill pathogens and other fungi - help supply nitrogen to fungus 69 Unikonts Synapomorphy: All unikonts have a single flagellum or are an amoebae with no flagella 2 major subclades 1. Amoebozoans 2. Opisthokonts Figure 28.3 (Campbell et al.) 71 Amoebozoa Gymnamoebas Entamoebas • Free-living (terrestrial, aquatic & fossorial) ~200 spp • parasites of vertebrates & inverts ~10 spp • Move via cytoplasmic streaming creating/extending pseudopodia Video1 • Also use pseudopodia to surround and eat food. Video 2 • Freshwater spp w/ contractile vacuole for expelling excess water 72 Amoebozoa Gymnamoebas Entamoebas • parasites of vertebrates & inverts ~10 spp Entamoeba histolytica – causes amoebic dysentery. 100,000 deaths per year (globally) 73 Clade: Amoebozoa Slime Molds Characteristic features: - Motile - Ingest food by phagocytosis - Produce fruiting bodies 74 Slime Molds vs. Fungi Look similar but not closely related • No hyphae • No cell wall • Motile (vs. nonmotile) • Ingestive feeding (vs. absorptive feeding) • Predators (vs. sapro...
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