Carbon monoxide inhibition of nitrogen fixation by Azotobacter

Journal Article · Thu Jan 01 04:00:00 EST 1942 · Arch. Biochem.; (United States)

OSTI ID:6240419

Lind, C J; Wilson, P W

CO inhibition of nitrogen fixation by Azotobacter vinelandii has been established. Definite inhibition is observed when the CO concentration is 0.1-0.2%; it increases with the pCO until at 0.5-0.6% fixation is almost completely suppressed. This inhibition is comparable with that of inoculated red clover plants, but the quantity of CO required is about 10 times greater than for the symbiotic system. In the range of CO concentration inhibitory for nitrogen fixation by azotobacter little consistent effect is noted on the assimilation of combined nitrogen, thereby establishing the specificity of the inhibition for nitrogen fixation. Certain of the findings were made possible only because rate as well as extent of fixation was measured and because two supplementary techniques - a micro and a macro - were used. The advantage and necessity of such type of experimental variation are discussed. 7 references, 6 figures, 3 tables.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 6240419
• Journal Information: Arch. Biochem.; (United States), Journal Name: Arch. Biochem.; (United States) Vol. 1; ISSN ARBIA
• Country of Publication: United States
• Language: English

Related Subjects

560302* -- Chemicals Metabolism & Toxicology-- Microorganisms-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AZOTOBACTER
BACTERIA
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
DOSE-RESPONSE RELATIONSHIPS
INHIBITION
MICROORGANISMS
NITROGEN FIXATION
OXIDES
OXYGEN COMPOUNDS