MI2011: Fungi Flashcards
List structural characteristics of fungi
- eukaryotic
- mitochondria
- chitin
- unicellular and multicellular
Do fungi have peptidoglycan?
No
List growth/nutritional characteristics of fungi
- asexual/sexual reproduction
- grow without free water in humid conditions
- grow vegetative without sexual cycle
- interact in symbiotic relationships
- absorb nutrients
During times of starvation or stressful conditions, would it be more beneficial for the fungi to produce asexually or sexually?
Sexually.
- allows changing of gene expression to survive in hard times
What are the two categories of unicellular fungi?
Dimorphic fungi and yeasts
How do yeast replicate?
Budding or fission
Differentiate between budding and fission
fission: splitting of a cell into two
budding: uneven divide of a cell into two
What are some structural characteristics of multicellular fungi?
- hyphae (septate/non-septate)
- mycelium
- vegetative hyphae
- aerial hyphae
- asexual/sexual spores
- pigmented
A mass of hyphae that provides support by embedding into substrate and absorb nutrients
Mycelium
What is key for differentiation of septate and aseptate hyphae?
Presence of septum
What area of the hyphae is the region for active growth?
The tip (the extension zone)
What can occur if you break hyphae apart?
Segments may make multiple new colonies asexually
What are two key structural characteristics of hyphae?
protoplasm and rigid walls
What are macroscopic fungi?
- mushrooms
- filamentous macroscopic fungi
- exist as mycelium
- in favourable environ conditions form fruiting bodies
sexual spores formed within a closed sac
ascospores