eukaryotic organisms, which means they have membrane bound organelles. they have cell walls made of...
TRANSCRIPT
• Eukaryotic organisms, which means they have membrane bound
organelles.• They have cell walls made of chitin.• Mycologists study FUNGI!
Kingdom Kingdom FungiFungi
Earth star
An example of Fungi You know
Kingdom Kingdom FungiFungi
Lack chlorophyll so they feed themselves by being ___________,
(which live off dead organisms and recycle nutrients back into the environment) or _____________, (which live off living organisms).
decomposers
parasites
Mushrooms – “Club Like” Fungi or Basidiomycete Fungi
Bracket Fungi – Basidiomycete Fungi
Bread Mold – a Zygomycete Fungi
Cup Fungi – Ascomycete Fungi
Note the cup shapes and orange peel color
Kingdom Kingdom FungiFungi
Fungi are heterotrophs that utilize a special process called
_________________ ______________
to obtain nutrients.
(food is digested outside the fungal body with enzymes
and then absorbed)
Extracellular Digestion
Kingdom Fungi – you must know 5 Major Phyla
1. Phylum Zygomycota = the Bread Molds
Rhizopus – black bread mold
2. Oomycota = the Water Molds
Water mold, potato blight, mildew
3. Phylum Ascomycota = the Sac Fungi
Yeast, morels, truffles
4. Phylum Basidiomycota = the Club Fungi
Mushrooms, puffballs, bracket fungi, rusts, smuts, toadstools
5. Phylum Deuteromycota = the Fungi Imperfecti
• The mycelium or body of a fungus is usually composed of filaments called a hyphae. It is seldom seen since it grows inside the host.
Kingdom Kingdom FungiFungi
• http://www.huffingtonpost.com/2007/11/20/oprahs-favorite-things-th_n_73588.html?show_comment_id=10470383
-are primarily decomposers
-asexual spores may be produced in sporangia
-sexual reproduction occurs between + and – strains forming a 2n zygote; a zygospore develops and may lie dormant for a long period of time; meiosis occurs just before germination
-only the zygote is diploid; all hyphae and asexual spores are haploid
Zygomycota (Rhizopus) the Common Molds
Zygomycota – common molds
The fungal mass of hyphae, known as the MYCELIUM penetrates the bread and produces the fruiting bodies on top of the stalks
Mycelia = a mass of hyphae or filaments
Rhizoids = root-like hyphae
The zhizoids meet underground and mating occurs between hyphae of different molds (SEXUAL REPRODUCTION)
Water Molds -- OomycotaThe water molds are better known as the MILDEWS. Fish tank fuzz is an example.
Protist-like mold because share common characteristics with plant-like protists, such as the cell wall
LifeCycle of Oomycota
Things to Know about Oomycete Fungi
1. Water molds or mildews
2. Cause diseases such as potato blight
3. Cell walls made of cellulose (like plant)
4. Hyphae have multiple nuclei! Because the cell walls do not fully close off.
5. Spore swims away like a flagellate, which is why it is protist like (think of Euglena)
Irish Potato Famine of 19th Century
Devastated potato crops, causing devastating starvation in Ireland
Yeast is an Ascomycete Fungus
Bracket Fungi
Puff Balls
Mushrooms
Jelly Fungi
Basidiomycete Fungi that all produce Basiospores
Other Basidiomycetes Rusts and Smuts
Rust infecting
wheat leaves Rust infecting a Leaf
Whitrot Smut digesting old wood
-Regarded as imperfect because they exhibit no sexual stage has been observed in their life cycle
-Members are not closely related and are not necessarily similar in structure or appearance; do not share a common ancestry, polyphyletic = coming from many ancestors – hmm weird
Deuteromycota (Imperfect Fungi)
Deuteromycota – the Fungi Imperfecti
• Resemble Ascomycetes, but their reproductive cycle has never been observed
• Different from Ascomycetes because there is a definite lack of sexual reproduction, which is why they are called Imperfect Fungi
Penicillium fungi
Up Close
Lichens are mutualistic symbiotic organisms. They have a fungus and a cyanobacterial portion. There are three lichen growth forms which are predominant in nature: _____________________________
LichensLichens
Crustose
Foliose
Fruticose
• Lichens are often the first organisms to enter a barren environment.
• The bacteria contribute energy (photosynthesis) and the fungus contribute anchorage, minerals, and a home.
LICHENS
Mycorrhizae
Mycorrhizae means “fungus-root”; mutualistic relationship between plant and fungi
The plant photosynthesizes while the fungus more efficiently takes up nutrients and water from the rhizosphere than the roots would alone.
Plant benefits include:•Improved nutrient/water uptake •Improved root growth •Improved plant growth and yield •Improved disease resistance •Reduced transplant shock •Reduced drought stress
Harmful
OR
Helpful
RINGWORM
CORN SMUT
candida albicans
Yeast are used for baking!
Morels and truffles used as food.
Morels
Truffles
Truffles are round, warty, fungi that are irregular in shape. They vary from the size of a walnut to that of a man's fist. Since the times of the Greeks and Romans these fungi have been used in Europe as delicacies, as aphrodisiacs, and as medicines. They are among the most expensive of the world's natural foods, often commanding as much as $250 to $450 per pound.
Truffles are harvested in Europe with the aid of female pigs or truffle dogs, which are able to detect the strong smell of mature truffles underneath the surface of the ground. The female pig becomes excited when she sniffs a chemical that is similar to the male swine sex attractant. The use of dogs to find truffles is also and option.
…and then there are the decomposers!
Shelf Fungi
… decomposers…
Penicillium used for what???
Treatments for Fungal Infections
• Antifungal creams/powders• Keep area clean and dry (fungus grows best in
moist, dark places)• Carefully clean the shower or bath using
bleach. • Hot wash socks, towels, bathmats at a
temperature of at least 60ºC. • Regularly wash floors where you walk bare
foot.