Chapter 20

Chapter 20 - NOTES FOR BIOLOGY 1002 SECTIONS 001 and 002...

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NOTES FOR BIOLOGY 1002 SECTIONS 001 and 002 Spring 2008 DR. STEVEN POMARICO Outline 1C CHAPTER 20 The Diversity of Fungi The Kingdom Fungi consists of organisms that are eukaryotic and mainly multicellular. They are all heterotrophic decomposers that obtain their food by absorption . Most members of the Kingdom Fungi have several structural elements in common: Mycelium Hyphae (singular hypha ) Septa (singular septum ) Chitin Spores Mycelium -is the feeding network of a fungus. (See fig 20-1 a) This network may be very large but is usually underground or within the surface of a decaying organism. The mycelium is composed of a woven mesh of hyphae Hyphae - the threadlike filaments of a fungus. (See fig 20-1 b)
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These filaments are the building structure of the mycelium. They consist of a tubular cell wall containing chitin surrounding a plasma membrane and cytoplasm. Chitin - a structural polysaccharide of modified sugars. In some fungi (coenocytic fungi) there are no separate cells and many nuclei are in a common cytoplasm. In other types of fungi (dikaryotic) the nuclei are partitioned into twos by septa . Septa
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This note was uploaded on 04/17/2008 for the course BIOL 1003 taught by Professor Pomarico during the Spring '08 term at LSU.

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Chapter 20 - NOTES FOR BIOLOGY 1002 SECTIONS 001 and 002...

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