Now, a team of scientists successfully engineered mutant strains of the bacteria to colonize the roots of rice plants and deliver a steady stream of nitrogen to them. (salon.com)
Tailoring these mutant strains of nitrogen-fixing bacteria to the needs of specific crops would markedly reduce the contribution of nitrogen runoff to eutrophication - nutrient loading in aquatic ecosystems. (salon.com)
Many studies on molecular mechanisms of alginate biosynthesis by bacteria have been done on Pseudomonas aeruginosa which is the opportunistic human pathogen and Azotobacter which is the soil dwelling bacteria. (psmjournals.org)
Even though these two bacteria ( Pseudomonas and Azotobacter ), secrete alginate in nature by using the same molecular mechanism. (psmjournals.org)
It shown that the bacteriocin binds specifically to sensitive cells but not to nonsensitive lactic acid bacteria, the producer strain or Gram-negative bacteria. (ncsu.edu)
Finally, the possible/probable presence of alternative N2 fixation systems in bacteria other than Azotobacter species is covered. (ncsu.edu)
The range of inhibitory activity by bacteriocins of lactic acid bacteria can be either narrow inhibiting only those strains that are closely related to the producer organism, or wide, inhibiting a diverse group of Gram-positive microorganisms. (ncsu.edu)
Low values were obtained for the mean immunological distances (1 - proportion of immunoprecipitation bands shared between strains) between Azotobacter paspali and Azotobacter vinelandii strains, suggesting that these two species are immunologically closely related. (microbiologyresearch.org)
When the three Azotobacter antisera were used, all Azotobacter species had mean immunological distances of less than 0.5, whereas the Azomonas species were immunologically more distant, showing that the six species of Azotobacter form an immunologically related group which is distinct from the Azomonas species. (microbiologyresearch.org)
Our results with the three Azomonas antisera show that each species of Azomonas is immunologically distant from the other species, as well as from the Azotobacter species. (microbiologyresearch.org)
The discovery of Ochoa and coworkers (3, 4) that polyribonucleotides are formed from nucleoside diphosphates in a reaction catalyzed by an enzyme from Azotobacter vinelandii made it clear that ADP rather than ATP was the reactive component. (nih.gov)
Paraquat induced this enzyme in a strain compromised in its ability to induce the defense response against oxidative stress (oxyR deletion) as well as in a strain that is constitutive and overexpresses the oxyR regulon. (ncsu.edu)
Multiple Strains1
Prescript-Assist ® SBO Probiotic is a proprietary blend of 28 multiple strains of probiotic microbiota, known as Soil-Based Organisms to help reinstate biological terrain of the gastrointestinal tract and promote robustness of GI tract. (optimalbreathing.com)
Ammonia5
Genetically engineered strains can produce significantly higher amounts of ammonia. (wikipedia.org)
Researchers have engineered strains of the ubiquitous, nitrogen-fixing soil bacterium Azotobacter vinelandii to produce ammonia and excrete it at high concentrations, transferring it into crop plants in lieu of conventional chemical fertilizers. (sciencedaily.com)
Our work helps provide a more complete, fundamental understanding of the factors that underpin gene expression in a model nitrogen fixing microorganism and defines the biochemistry that brings about ammonia excretion in A.vinelandii ," said Mus. (sciencedaily.com)
That's because a. vinelandii can naturally "fix" atmospheric nitrogen gas into the soil as ammonia. (salon.com)
Consistently, researchers found that the mutant strains produced large enough quantities of ammonia to sustain rice plants. (salon.com)
Azospirillum1
The broad distribution of Azotobacter and Azospirillum in various surroundings, such as water, soil and residues make it ecologically important. (psmjournals.org)
Mutation1
Catalase (HPI), but not manganese-superoxide dismutase, was over-expressed under anaerobic conditions in a strain harboring a constitutive oxyR mutation. (ncsu.edu)
Bacillus2
Bacillus thuringiensis serovar konkukian str. (up.ac.za)
In fact, a. vinelandii has been applied as a biofertilizer for over a century. (salon.com)
Molecular4
Azotobacter vinelandii OPNA is a potential producer of large quantities of PHB, having ultra-high molecular weight by fed-batch production strategies. (pucv.cl)
RESULTS: In batch and fed-batch cultures at different carbon-nitrogen molar ratios (10, 14 and 18), the OPNA strain produced PHB of high and ultra-high weight average molecular weight, with values between 2.3 and 6.6 MDa. (pucv.cl)
In this strain, the weight average molecular weight was highly dependent on the initial carbon-nitrogen ratio, reaching the highest value (6.6 MDa) in batch cultures conducted with a carbon-nitrogen ratio of 18 and the lowest (2.3) with a carbon-nitrogen ratio of 10. (pucv.cl)
CONCLUSION: The OPNA strain accumulated up to 80% of PHB of ultra-high molecular weight as a function of the initial carbon-nitrogen molar ratio. (pucv.cl)
Nitrogen1
Azotobacter vinelandii is Gram-negative diazotroph that can fix nitrogen while grown aerobically. (wikipedia.org)
Mutant1
The plasmid was extremely stable (100% killer cells) and expressed more toxin in the mutant strain AH22. (ncsu.edu)
Chromosome1
A. vinelandii can contain up to 80 chromosome copies per cell. (wikipedia.org)
Hydrogen1
The synthesis of manganese-superoxide dismutase in response to hydrogen peroxide and to paraquat was examined in strains of Escherichia coli with different mutations in the oxyR gene. (ncsu.edu)
Produce2
A. vinelandii is a free-living N2 fixer known to produce many phytohormones and vitamins in soils. (wikipedia.org)
2009), whereas Azotobacter produce the stiffer alginate with usually a greater amounts of G residues. (psmjournals.org)
An identical genomic localization of these ORFs are found in other filamentous, N 2 -fixing cyanobacterial strains. (biomedcentral.com)
Cell1
The M. smegmatis strain expressing Rv1523 exhibited altered cell wall lipid composition, leading to an increased survival under surface stress, acidic condition and resistance to antibiotics. (bvsalud.org)
Region1
The beta-sandwich creates a stable fold that allows conformational strain to be introduced across an internal cleavage region between the alpha and beta chains and places the pyruvoyl cofactor in a position for efficient electron withdrawal from the substrate. (nih.gov)