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Title: Plant Biology- Invasion of Land and Bryophytes
Description: These notes include: Basidiomycota Invasion of Land • Borophytes
Description: These notes include: Basidiomycota Invasion of Land • Borophytes
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Basidiomycota
Invasion of Land
• Borophytes
Basidiomycota
• Decomposers- fungal groups discussed last lecture
...
• Recognize mushrooms as fruiting bodies
...
• Basidiomycota has a septum associated with it and have structures known as
dolipores
...
Once you achieve diploidity, meiosis
is involved in forming a basidiospore that is then released
...
Mushrooms, that can get you high [hallucinations], kill
you or are good for you
...
• Mushrooms with red caps - amenita will kill you
...
This is due to the peculiarity going on in the
dikaryon state that is not seen
...
• The gasteromycetes (gastric-stomach) inclues puffballs
...
However in puff
balls - the mycelial structure is below the ball
...
Want to spread your basidiospore
as far as possible- have spores inside a ball
...
It emits pheromones and chemicals that float into the air- you
inhale the chemicals and then it has a hallucinatory effect on you
...
-Example
of spore dispersal in basidiomycota
...
Can wipe out 60-70% of the
crop depending on the virulent strain present
...
the teliospores start out with a n+ n (genetically
different) and then undergo fusion to form the diploid
...
The basidiospore
will grow on a secondary host which is some other plant than you’re
interested in
...
You get 1n + and 1n- which will fuse and form the dikaryon stateThis is known as a aeciospore
...
On the primary host - where pathogenicity is very
important
...
After the over wintering
season you get a teliospore
...
Re-infection phase that occurs within the primary host
...
When it gets into the primary host- all good
because 1 or 2 people get sick
...
thats the re-infection of
the urediospore- its poised to maximize its ability to infect as much host
as possible
...
What going to make the host virulent? Teliospores release basidiospores
on the secondary host resulting in a + and - uncle
...
Next step in the evolutionary process- Invasion of Land by animals
[Bryophytes]- photosynthetic organism
• The organisms that were successful in invading land (initial photosynthetic
organisms)- right now are small and insignificant and this was the
Bryophytes
...
But these organisms were the first that
invaded land
...
They can survive dry
conditions very well but for growth they like stuff wet
...
In terms of
being able to propagate they can do this in a variety of ways- can do this
asexually
...
• They require water explicitly because they have a motile sperm - helps them
swim
...
Being released at a ferocious rate
...
Within these groups then you have a female
component known as the archegonia
...
Helps in genetic diversity
...
And then eventually when you think about the
sporophyte being released- that can be a strong projectile being
released- can think of it as moss
Title: Plant Biology- Invasion of Land and Bryophytes
Description: These notes include: Basidiomycota Invasion of Land • Borophytes
Description: These notes include: Basidiomycota Invasion of Land • Borophytes