Fungal Characteristics 1) Cell wall made of Chitin
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Transcript of Fungal Characteristics 1) Cell wall made of Chitin
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Fungal CharacteristicsFungal Characteristics 1)Cell wall made of Chitin 2)Heterotrophs and major Decomposers 3)Body is made of Long filaments of hyphae
which form a mycelium 4)Reproduce sexually and asexually
Asexually by sporesSexually by mating of hyphae filaments
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An example of Fungi You know
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Mushrooms – “Club Like” Fungi or Basidiomycete Fungi
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Bracket Fungi – Basidiomycete Fungi
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Bread Mold – a Zygomycete Fungi
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Cup Fungi – Ascomycete Fungi
Note the cup shapes and orange peel colour
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Kingdom Fungi – you must know 5 Major Phyla1. 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
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-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
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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
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Rhizoids = root-like hyphae
The zhizoids meet underground and mating occurs between hyphae of different molds (SEXUAL REPRODUCTION)
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Zygomycota (Rhizopus)
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Lifecycle of a Zygomycete Fungi – Asexual then Sexual
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Ascomycota – Cup Fungi Life Cycle
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Yeast is an Ascomycete Fungus
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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.
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Morels are Ascomycete Fungi
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Basidiomycete or Club Fungi
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Life Cycle of Basidiomycete Fungi
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Bracket Fungi
Puff Balls
MushroomsJelly Fungi
Basidiomycete Fungi that all produce Basiospores
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Other Basidiomycetes Rusts and Smuts
Rust infecting
wheat leaves Rust infecting a Leaf
Whitrot Smut digesting old wood
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-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)
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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
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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
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LifeCycle of Oomycota
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Things to Know about Oomycete Fungi
1. Water molds or mildews2. Cause diseases such as potato blight3. 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)
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Irish Potato Famine of 19th Century
Devastated potato crops, causing devastating starvation in Ireland
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Phylum Ex’s Characteristics
Asexual Sexual
Oomycota MildewSpud blight
Cellulose cell walls, 2N hyphae
Flagellated oospores from sporangia
Gametes fuse in gametangia creating oospores
Zygomycota Rhizopus a dung fungus
Chitin cell wallsCoenocytic = hyphae lack crosswalls
Unflagel. spores drop from sporangia
Gametangia fuse to create zygospore
Ascomycota Yeast, morels, truffles
Conidia on conidophores
Hyphae + & - fuse to create ascospores in ascus
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Basidiomycota Mushrooms
Puffballs, rusts, smuts
Cross walls in hyphae
Asexual by way of Conidophores which produce conidiospores
Sexual when hyphae fuse in BASIDIA to produce
basidiosporesFungi Imperfecti
Deuteromycota
Penicillium,
Athlete’s Foot
fungus,Tomato Blight
Similar To
Basidio and
Zygomy
Asexual by conidia which
produce conidophores
Sexual reproNot known
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Cross Walls of Hyphae
coenocytic
having multiple nuclei embedded in cytoplasm without cross walls; nonseptate
Coenocytic hyphae where the nucleis of each cell is embedded in the cytoplasm without a cell wall
Eg. Zygomycota, Oomycota
Hyphae with cross walls
Eg. Basidiomycota, Ascomycota
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Lichens are mutualistic symbiotic organisms. They have an ____________ fungus and a _________ or cyanobacterial portion. There are three lichen growth forms which are predominant in nature: __________________________________________________
LichensLichens
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Crustose
Foliose
Fruticose
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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
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Soredia are the asexual reproductive part of lichens, containing both symbionts. Rhizines may be present to anchor the lichen. Notice the distinctive algal layer and the fungal layer present in the above illustration.
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