منابع مشابه
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 ...
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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...
متن کاملAmmonia 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...
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We evaluated the regional distributions of six nitrogen (N2)-fixing bacteria in the North Pacific Ocean using quantitative polymerase chain reaction amplification of planktonic nifH genes. Samples were collected on four oceanographic research cruises between March 2002 and May 2005 that spanned a latitudinal range from 12uS and 54uN between 152uW and 170uW. Samples were collected throughout the...
متن کاملNitrogen-fixing, photosynthetic, anaerobic bacteria associated with pelagic copepods
Purple sulfur bacteria are photosynthetic, anaerobic microorganisms that fix carbon dioxide using hydrogen sulfide as an electron donor; many are also nitrogen fixers. Because of t h e ~ r requirements for sulfide or orgamc carbon as electron donors in anoxygenic photosynthesis, these bacteria are generally thought to be l im~ted to shallow, organic-nch, anoxic environments such as subtidal mar...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1908
ISSN: 0006-8071
DOI: 10.1086/329738