BIOL 2043 Lecture Notes - Lecture 14: DermisPremium
2 pages34 viewsFall 2018
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8th October 2018
Plants are unable to fix atmospheric nitrogen so they form
symbiotic relationships with Rhi bivm bacteria
↳Allow bacteria to infect them
.Root hair curls around bait .
.Quickly multiply tcreate
infection thread that enters
.Form bacteroids.in cortical cells
.lateral roots modified to form nodules where bacteria live and
atmospheric nitrogen gas enchomge takes place
→Almost all terrestrial plants are
associated with afungal symbiont
qnvers.im of decaying matter to useful products
↳Fungus sugars,amino acids
→Ectomycorrhizal very rare but fungus envelopes
the entire not tip with asheath .Hyphae from
the sheath penetrate epidermal cells and
form atiartig net to facilitate nutrient exchange .
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