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84821
Untitled
Description
Mind Map on Untitled, created by Liv on 12/05/2013.
Mind Map by
Liv
, updated more than 1 year ago
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Created by
Liv
about 11 years ago
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Diazotrophs = N-fixing organisms
ways to protect nitrogenase from O2
Slime
limit O2 diffusion
high levels of resp.
oxidise excessively to use up O2 inside cell
heterocysts
thick walled cells
essential for long term stability of rice paddies
bacteria produce NH3 - NO additional N
nitrogenase enzyme
fixes N
needs lot of ATP
Fe-S-Mo (Fe-Mo-Co)
electron transfer
1 N2 needs 8 electrons
inactivated by O2 = anaerobic
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