| nitrogen fixation |
The conversion of atmospheric nitrogen (N 2 ) into oxidized forms that can be assimilated by plants. Biological nitrogen fixation is catalysed by the enzyme nitrogenase, which is found only in prokaryotes. Certain blue-green algae and some genera of bacteria (eg, Rhizobium spp.; Azotobacter spp.) are capable of biochemically fixing nitrogen. Such bacteria are very important symbionts for plants growing in nitrogen-poor soils.
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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| nitrate |
The only form in which nitrogen can be used directly by plants; a component of chemical fertilizers.
출처: www.fao.org/docrep/003/X3910E/X3910E17.htm
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| nitrifying bacteria |
Principally, Nitrobacter and Nitrosomonas .
출처: members.aol.com/sierram/sierram3.htm
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| nitrogen cycle |
(see Nitrification cycle)
출처: members.aol.com/sierram/sierram3.htm
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| nitrogenous base |
A nitrogen-containing base that, along with a pentose sugar and a phosphate, is one of the three parts of a nucleotide, the building block of RNA and DNA.
출처: www.modernhumanorigins.com/n.html
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