BIOL 1002 Chapter : Unit 2
Document Summary
The mycelium is composed of a woven mesh of hyphae: hyphae (singular hypha)- threadlike filaments of a fungus, these filaments are the building structure of the mycelium. Mycorrihizae fungi: live in intimate contact with the roots of plants, no septa present, hyphae surround and penetrate root cells (see fig 22-7 and 22-15) Interaction forms a beneficial relationship called a mycorrhiza. Includes the common mushroom and relatives, also shelf fungi, puffballs, rusts and smuts. While all fungi use absorption to obtain their food, there are variations with respect to the food type: saprobes - decomposers of dead material (most fungi fall into this group) Two types of symbiotes: parasitic- fungi that live on living organisms, dutch elm disease, corn smut, athletes foot, jock itch, yeast infections, mutualistic - fungi live interdependently with photosynthetic organisms. 22-14): lichens are often the first organisms to appear in the primary succession of a community (see fig.
