Chapter 16 Outline

Chapter 16 Outline - Chapter 16 Eukaryotic Microorganisms The Fungi Introduction 16.1 Characteristics of Fungi Fungi Share a Combination of

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Chapter 16 Eukaryotic Microorganisms: The Fungi Introduction 16.1 Characteristics of Fungi Fungi Share a Combination of Characteristics Fungal life cycles involve a growth phase and reproductive phase Molds grow as long, tangled filaments of cells in visible colonies Yeasts are unicellular fungi Some forms are dimorphic, growing at filamentous molds or as unicellular pathogens Most fungi (except yeasts) exist as hyphae A mycelium is a thick mass of hyphae Fungal cell walls are composed of chitin In many species, septa divide the cytoplasm into separate cells Hyphae containing many nuclei are considered coenocytic Fungi are heterotrophic Fungal Growth Is Influenced by Several Factors Fungi take up nutrients through absorption Most fungi are aerobic Most fungi grow best at around room temperature Many fungi thrive at slightly acidic pH (pH 5-6) Mycorrhizae live in mutualistic symbiosis with plant roots, helping take up water and minerals Fungal endophytes live in plant tissue, particularly leaves Reproduction in Fungi Involves Spore Formation Sporulation occurs in fruiting bodies Asexual reproductive structures develop at the ends of specialized hyphae Many asexual spores (sporangiospores) develop in sacs called sporangia Others produce unprotected spores (conidia) on conidiophores Fragmentation of hyphae yields arthrospores In budding, a blastospore develops from the parent cell Fungi can also reproduce sexually Opposite mating types come together and fuse into a heterokaryon 16.2 The Classification of Fungi
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This note was uploaded on 04/17/2009 for the course MIC 201 taught by Professor Lacroix during the Spring '08 term at Rhode Island.

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Chapter 16 Outline - Chapter 16 Eukaryotic Microorganisms The Fungi Introduction 16.1 Characteristics of Fungi Fungi Share a Combination of

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