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Nitrogen fixation

For 330 N-fixation vocab, many from Chapin et al 2011

TermDefinition
Closed system System in which the internal transfers of substances are much greater than inputs and outputs.
Endophyte Microorganisms that live between living plant cells, but usually remain asymptomatic.
Frankia A genus of nitrogen-fixing, filamentous bacteria that live in symbiosis with alder, Ceanothus, and other nonlegume woody species.
Heterocyst Specialized non-photosynthetic cells of phototrophs that protect nitrogenase from denaturation by oxygen.
Nitrogen fixation Conversion of di-nitrogen gas to ammonium.
Nutrient limitation Limitation of plant growth due to insufficient supply of a nutrient.
Oxidation Loss of electrons by an electron donor in oxidation-reduction reactions.
Reduction The gain of electrons by an electron acceptor in oxidation-reduction reactions.
Rhizobia Bacteria that fix nitrogen (diazotrophs) after becoming established inside root nodules of legumes (Fabaceae).
Rhizosphere Zone of soil that is directly influenced by roots.
Symbiosis A close, long-term association between organisms of different species ("living together").
Nitrogenase Enzyme that converts di-nitrogen to ammonium.
Created by: mdcoleman
 

 



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