Effect of the herbicide simazine on vitamin production by Azotobacter chroococcum and Azotobacter vinelandii
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چکیده
منابع مشابه
Evaluation of three methods for preservation of Azotobacter chroococcum and Azotobacter vinelandii
Plant growth-promoting bacteria –PGPB– are microorganisms that can grow in, on, or around plant tissues and stimulate plant growth by numerous mechanisms (Vessey 2003). Within this group, nitrogen-fixing bacteria play a remarkable role in plant nutritition. They can take N2 from atmosphere and make it available for plant uptake (Halbleib and Ludden 2000). Azotobacter, a nitrogen-fixing bacteria...
متن کاملAzotobacter genomes: the genome of Azotobacter chroococcum NCIMB
The genome of the soil-dwelling heterotrophic N2-fixing Gram-negative bacterium Azotobacter chroococcum NCIMB 8003 (ATCC 4412) (Ac-8003) has been determined. It consists of 7 circular replicons totalling 5,192,291 bp comprising a circular chromosome of 4,591,803 bp and six plasmids pAcX50a, b, c, d, e, f of 10,435 bp, 13,852, 62,783, 69,713, 132,724, and 311,724 bp respectively. The chromosome ...
متن کاملStudies on Azotobacter Chroococcum Beij.
The study of the metabolism of Azotobacter has been generally approached from the standpoint of the r6le of this organism in the nitrogen cycle in Nature, but the fact that the ability to fix free nitrogen is regulated by the presence or absence of combined nitrogen in the medium has not been given serious attention although it is made plain in the works to be cited. Bejierink and Van Delden (1...
متن کاملThe effect of alkylresorcinol on lipid metabolism in Azotobacter chroococcum.
We studied the effect of exogenous alkylresorcinols on the lipid metabolism of Azotobacter chroococcum. We observed that when 5-n-pentadecylresorcinol was present in the growth medium, the more endogenous alkylresorcinols were synthesized. Concurrently, a drop in the amount of phospholipids was observed. These changes were associated with increasing numbers of dormant cysts, while the number of...
متن کاملProduction of plant growth substances by Azotobacter chroococcum.
Cultures of Azotobacter chroococcum strain A6 were grown for 14 days in a nitrogen-deficient mineral medium, the supernatant fluid and bacteria extracted and examined by paper partition chromatography with two solvent systems which separate authentic gibberellin (GA 3) and indolyl-3-acetic acid (IAA). Gibberellin-like substances were not detected on the chromatograms examined under ultraviolet ...
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ژورنال
عنوان ژورنال: Applied Soil Ecology
سال: 1997
ISSN: 0929-1393
DOI: 10.1016/s0929-1393(96)00143-6