Results 181 to 190 of about 13,036 (218)

Tn5-Mutagenesis in Azospirillum Brasilense

1988
A system is described for transposon mutagenesis of Azospirillum brasilense using the mobilizable plasmid pSUP2021. Mutants were selected on rich medium containing kanamycin and streptomycin. All the auxotrophs isolated were impaired in their sulfur metabolism. Calcofluor-dark Tn5 mutants were tested for their ability to form flocs.
M. Vanstockem, A. Milcamps, K. Michiels, J. Vanderleyden, A. P. Van Gool   +4 more
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Pectic enzymes of Azospirillum brasilense

1991
The production and activity of pectic enzymes elaborated by Azospirillum brasilense (strain C.A. 10), a diazotroph isolated from the rhizosphere of rice (Oryza sativa L.), was studied as this organism is known to enter through the middle lamella to colonize the histosphere of rice roots.
C. Sekar, N. N. Prasad
openaire   +1 more source

[Plasmids of Azospirillum brasilense].

Molekuliarnaia genetika, mikrobiologiia i virusologiia, 1987
The cells from natural isolates of A. Brasilense were found to harbour 1 to 4 plasmids with the molecular masses within the 27-300 Md range. 100 Md plasmids are specific for this bacterial species. Strains isolated from the roots of cereals (wheat, maize, barley) have more heterogeneous plasmid composition as compared to the strains isolated from soil.
T I, Bakanchikova, V A, Klimacheva, I A, Borovok, A N, Maĭsurian   +3 more
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Carotenoid production and phenotypic variation in Azospirillum brasilense

Research in Microbiology, 2017
We assessed the occurrence of phenotypic variation in Azospirillum brasilense strains Sp7, Cd, Sp245, Az39 and phv2 during growth in rich media, screening for variants altered in colony pigmentation or extracellular polysaccharide (EPS) production. Previous studies showed that EPS-overproducing variants of Sp7 appear frequently following starvation or ...
Gal Reem, Brenholtz, Dafna, Tamir-Ariel, Yaacov, Okon, Saul, Burdman   +3 more
openaire   +2 more sources

Salt tolerance of Azospirillum brasilense.

Acta microbiologica Hungarica, 1986
The effect of various salts on the growth and N2-ase activity of Azospirillum brasilense was tested. Bicarbonate was found to be the most toxic, followed by chlorides and sulphate. Tolerance of A. brasilense to these salts was comparable to that of many species of Rhizobium. SO4-- was stimulatory to growth and N2-ase activity up to 40 meq.
A V, Rao, B, Venkateswarlu
openaire   +1 more source

Construction of an Azospirillum brasilense Sp7 recA mutant

Molecular and General Genetics MGG, 1990
Cosmid clones encoding the recA gene of Azospirillum brasilense were isolated by intergeneric complementation of an Escherichia coli recA mutant. Site-directed Tn5 mutagenesis and subcloning of one complementing cosmid clone allowed us to localize the A. brasilense recA gene on a 1.2 kb DNA fragment.
C, Croes, J, Vanderleyden, K, Michiels
openaire   +2 more sources

Homology between plasmids of Azospirillum brasilense and Azospirillum lipoferum

1989
Azospirillum strains examined so far contain large plasmids with which no phenotypic property has been associated. Homology was previously detected between total DNA from several Azospirillum strains and Rhizobium meliloti nodulation (nod and hsn) genes, which in Rhizobium are plasmid-borne. From A.
Claire Vieille, I. Onyeocha, M. Galimand, Claudine Elmerich   +3 more
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Azospirillum brasilense: Laboratory Maintenance and Genetic Manipulation

Current Protocols in Microbiology, 2017
AbstractBacteria of the genus Azospirillum, including the most comprehensively studied Azospirillum brasilense, are non‐pathogenic soil bacteria that promote the growth of diverse plants, making them an attractive model to understand non‐symbiotic, beneficial plant‐bacteria associations.
Jessica, Gullett, Lindsey, O'Neal, Tanmoy, Mukherjee, Gladys, Alexandre   +3 more
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Chemosensory Responses in Azospirillum brasilense

2006
The ability to swim and navigate the surrounding environment confers an advantage to motile bacteria, allowing the occupation of niches that are optimum for survival and growth. Bacteria are too small to sense their environment spatially, so they must sense the environment temporally by comparing the past and present environments and altering their ...
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Osmoregulated Periplasmic Glucans of Azospirillum brasilense

1998
Osmoregulated periplasmic glucans (OPG) are general components of the envelopes of Gram-negative bacteria and share the following features: i) glucose as the sole sugar; ii) localization in the periplasmic space; iii) synthesis under osmotic control and particularly abundant when the medium osmolarity is low.
S. Altabe, P. Talaga, J.-M Wieruszeski, G. Lippens, R. Ugalde, J.-P. Bohin   +5 more
openaire   +1 more source