1 / 10

Fungi

Fungi. Biology 112. Fungi were once thought to be part of the plant kingdom. What are fungi?. Eukaryotic heterotrophs that have cell walls Walls are m ade up of chitin , a complex carbohydrate that is also found in the external skeletons of insects. Fungi and nutrition.

zuzana
Download Presentation

Fungi

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fungi Biology 112

  2. Fungi were once thought to be part of the plant kingdom

  3. What are fungi? • Eukaryotic heterotrophs that have cell walls • Walls are made up of chitin, a complex carbohydrate that is also found in the external skeletons of insects

  4. Fungi and nutrition • Although they rely on other organisms as a food source, they do not ingest their food • Food is digested outside the body and then absorbed • Decaying matter is the major food source for fungi • Other fungi behave as parasites, relying on its host for food

  5. Structure and Function of Fungi • With the exception of yeasts, all fungi are multicellular • They are composed of thin filaments called hyphae – each one only being one cell thick • The bodies are composed of many hyphae tangled together into a thick mass called a mycelium • It covers a large surface area and is well suited for absorbing food • The fruiting body is a reproductive structure that grows above the mycelium • Many fruiting bodies can be attached to a single mycelium body

  6. Parts of a mushroom

  7. Fairy rings • Over time, the soil nutrients near the centre of mycelium may become depleted • New fruiting bodies will only grow in the outer circle of where the mycelium exists • A ring forms that can range from 10 – 30 meters in diameter

  8. Asexual Reproduction in fungi • Asexually • When cells or hyphae break away from a fungus and grow on their own • Some release spores, a reproductive cell that is capable of producing another organism through mitosis alone • Sometimes, spores are produced in structures called sporangia which are found at the tips of specialized hyphae called sporangiophores

  9. Sexual reproduction of fungi • Sexually • Mating types rather than female and male • When opposite types meet, they fuse together and bring both nuclei together into the same cell • a fertilized zygote forms, undergoes meiosis and produces spores • Mitosis then occurs, creating new organisms

  10. How fungi spread • Fungi and mold are found in just about every environment on the planet • They need the right combination of temperature, moisture and food • Many release spores • Other species lure animals in order to spread

More Related