Enumeration and Identification of Nitrogen-Fixing Bacteria from Forage Grass Roots

Ferredoxins from Nitrogen-Fixing Bacteria

Two ferredoxins have been purified from N2-fixing Mycobacterium flavum. Ferredoxin I had a minimum molecular weight (by amino acid analysis) of 11 230 and contained 7.4 mol Fe and 7.0 mol S2per mol. The ratio of the absorbance at 400 nm to that at 275 nm was 0.7. Ferredoxin I1 had a minimum molecular weight of 13478 and contained 3.4 mol Fe and 3.2 mol S2per mol. The ratio of the absorbance at ...

Diversity of Nitrogen-Fixing Bacteria Associated with Switchgrass in the Native Tall-Grass

Complementary functioning of two components from nitrogen-fixing bacteria.

Use of alternate substrates (acetylene, azide, cyanide) for estimating N(2) fixation confirmed that recombined fractions from different bacteria are functional but restricted in complementarity.

Ammonia Accumulation of Novel Nitrogen-Fixing Bacteria

Nitrogen is an essential element for many biological processes, including those occurring in plants (Ogura et al., 2006). Despite the abundance of atmospheric nitrogen, production of nitrogen fertilisers by the Harber–Bosch process is increasing annually due to the deficiency of ammonia produced by biological nitrogen fixation—the enzyme-catalyzed reduction of nitrogen gas (N2). Concern over ‘g...

Nitrogen-Fixing Bacteria in Eucalyptus globulus Plantations

Eucalypt cultivation is an important economic activity worldwide. In Portugal, Eucalyptus globulus plantations account for one-third of the total forested area. The nutritional requirements of this crop have been well studied, and nitrogen (N) is one of the most important elements required for vegetal growth. N dynamics in soils are influenced by microorganisms, such as diazotrophic bacteria (D...