spores and other fungi strcutures Flashcards
spore and fungi basic
○ Eukaryotic, no chlorophyll
○ Absorb nutrients
○ Exist in both mold and yeast form
yeast characteristics
simple
-single cell
-grow best at body temp
-we carry normal flora yeast, not a problem
-identified by assimilation sugars
mold characteristics
more complex
-multicellular
-grow best at 30
- no mold in us
-can be contaminant or pathogen
-ID sporulating structures under microscope
how is mold transferred
aerosolization
-work under hood
-negative pressure room
how long to keep fungal cultures
4 weeks
reproduction can be
asexual or sexual
sexual cycle
fungi perfecti
asexual
fungi imperfecti
normally ID what stage of fungi reproduction
asexual
sexual reproductive spores found in
nature
not common
formed when a nucleus from a male cell passed through a bridge into female cell
ascospore
3 reproductive spores
ascospore
basidiospores
zygospores
where is ascospore found
sheathed in cleistothecium
where do basidiospores emerge
on top of basidium
zygospores
2 compatible hyphae each extend an arm toward each other and fuse to form a zygosporangium
in asexual spores blastospores are the
budding off the mother cell
-associated with yeast
elongate pseudohyphae
arthrospores
asexual
-barrel shaped spores and are simple in structure and nutrition of all spores
-produced at end of hyphal element and break off hyphae - aerosolization
where is arthrospores more common
mold
chlamydospores
-protective spores and form in conditions not conducive for growth
-large oval to round spores, thick
can be terminal, sessile, intercalary
where is chlamydospores found
yeast and mold
terminal
end of pseudohyphae or hyphae
sessile
sitting on the hyphae
intercalary
middle of hyphae or pseudohyphae
sporangiospores are found in a sac called
sporangium
-when breaks open all spores released
where is the only place you will find sporangiospores
on mold that have aseptate
sporangiospores found at top of supporting structure known as
sporangiophore
most common spore seen in molds
conidia
-if doesn’t fit in one of other categories it is this
-many shapes and sizes
new name of conidia
aleurospores
primary supporting structure that will give rise to conidia
conidiophore
-long or short
has seperations or cross walls in them
septate hyphae- mold
has no separations or cross walls in them
aseptate hyphae
pseudohyphae only seen in
yeast
-elongation of blastospores
aerial hyphae
○ Normally where spores are located and can be seen above media (air)
vegetative hyphae
○ Will be supporting or nutrient drawing hyphae and will submerged below media
- Used as an anchor
name given to the mat of hyphae that you see when you look at mold with naked eye
mycelium
-lots of hyphae together
rhizoids
root like structures whose only functions is to help anchor the fungus to supporting media
-does not draw up nutrients
-nodal or internodal
where is rhizoids seen
aseptate hyphae
nodal
right under sporangiophore
internodally
between sporangiophore