BIOL 1002 Chapter : Ch 22 Notes
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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 (singular hypha): the threadlike filaments of a fungus. (see fig 22-1 b) 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 two nuclei) the nuclei are partitioned into twos by septa: septa (singular septum): structures that partially separate the cytoplasm inside the hyphae (see. This separation is incomplete so that the cytoplasm is contiguous but the nuclei are kept apart: spores. The general life cycle of fungi involves the production of spores.
