The Fungi Kingdom Mycology -the study of fungi fungi - plural fungus - singular 1) fungi are eukaryotic they have a nuclei & mitochondria 2) they are heterotrophs.

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The Fungi Kingdom Mycology -the study of fungi fungi - plural fungus - singular 1) fungi are eukaryotic they have a nuclei & mitochondria 2) they are heterotrophs they depend on other organisms for food 3) they are multicellular 4) they cannot move on their own 4 Main Characteristics of Fungi

The Fungi Kingdom 1) fungi lack chlorophyll 2) fungi are not photosynthetic cannot produce their own food 3) they never reproduce by seeds 4) most fungi have cell walls made of chitin… 4 Reasons Fungi Are Different From Plants cellulose Plant cell walls are made of most are saprophytes some are parasites Saprophyte- feeds on dead/decaying organisms

The Fungi Kingdom Parts of fungi: Hyphae – network of thin thread-like structures (filaments) that form the “body” of fungus hyphae grow and branch until they cover and digest the food source (upon which the fungi is growing). hyphae contain cytoplasm hypha - singular hyphae - plural

The Fungi Kingdom Mycelium -a mass of hyphae mycelia - plural The mycelium is usually hidden in the soil, in wood, or another food source Some hyphae may be divided by septa. A mycelium may fill a single ant, or cover many acres

The Fungi Kingdom What are we looking at when we see a… fungus-among-us? The ‘living’ body of the fungus is a mycelium The part of the fungus that we see is only the “fruit” of the organism

The Fungi Kingdom 1. Most fungi reproduce both sexually and asexually. 2. Most fungi reproduce by using spores (asexual) Reproduction is classified according to: 3. Fungi spores are microscopic. EX: Mushrooms & puffballs release large clouds of spores. Each cloud contains millions of spores Fungi Reproduction: 1) the way they form the spores 2) the shape of the structure in which spores are made

Asexual reproduction – production of various types of spores *Sporangiophores- upright stalk with an enclosed sac ( bread mold) *Conidia - upright stalk with no enclosed sac (penicillin) *Fragmentation – hyphae dry out and shatter releasing individual cells that act like spores (athlete ’ s foot) *Budding – part of a yeast cell pinches itself off to produce small offspring

Sexual reproduction *Hyphae of different mating types fuse and give rise to a specialized structure that produces spores (diploid) *Most fungi are haploid throughout most of their life cycle When environmental conditions are favorable, asexual reproduction occurs rapidly. When unfavorable conditions stress the organism, sexual reproduction occurs and the offspring have an increased likelihood that they will be better suited for the environment.