Results 141 to 150 of about 3,153 (182)

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
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
openaire   +1 more source

Atypical R–S Dissociation in Azospirillum brasilense

Microbiology, 2003
It was found that atypical R-S dissociation in the type strain A. brasilense Sp7 is not accompanied by drastic changes in the carbohydrate moieties of bacterial lipopolysaccharides but is rather due to different contributions of two O-specific polysaccharides (found in both R and S dissociants) to the age-dependent architectonics of the cell surface.
L Iu, Matora, O B, Serebrennikova, L P, Petrova, G L, Burygin, S Iu, Shchegolev   +4 more
openaire   +2 more sources

Denitrification in Azospirillum brasilense

1984
This item was digitized as part of a project to share McGill's intellectual legacy with the public. If you are the copyright holder or a relative of the copyright holder who is deceased, you may request withdrawal by emailing escholarship.library@mcgill.ca.
openaire   +1 more source

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

Polysaccharide synthesis in Azospirillum brasilense

1995
The surface of bacteria consists of polysaccharides, like the exopolysaccharides and lipopolysaccharides and, as it is the case for Azospirillum brasilense, glycoproteins like glycosylated flagella. The precursors for the synthesis of polysaccharides are sugarnucleotides.
Paul De Troch, Daniel J. Petersen, Jos Vanderleyden   +2 more
openaire   +1 more source

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
openaire   +1 more source

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

Cell Ultrastructure in Azospirillum brasilense Biofilms

Microbiology, 2020
Due to the primary localization of both epiphytic and endophytic plant growth-promoting rhizobacteria on the surface of the plant root system, biofilm formation is an adaptive trait for these microorganisms. Under conditions of nitrogen limitation in liquid media, nitrogen-fixing Azospirillum brasilense strains switch mainly to the biofilm mode of ...
A. V. Shelud’ko, D. I. Mokeev, S. S. Evstigneeva, Yu. A. Filip’echeva, A. M. Burov, L. P. Petrova, E. G. Ponomareva, E. I. Katsy   +7 more
openaire   +1 more source

Regulation of the nifHDK Genes Transcription in Azospirillum Brasilense

1991
The regulation of transcription of the structural genes for nitrogenase of Azospirilium brasilense was investigated. The function of two regions controlling the transcription of the nifH gene was studied. Data obtained suggested a mechanism of nif regulation in Azospirillum different from that described in Klebsiella pneumonlae. The effect of different
C. SCHIPANI, BAZZICALUPO, MARCO, FANI, RENATO, GALLORI, ENZO, A. GRIFONI, PASTORELLI, ROBERTA, POLSINELLI, MARIO, A. BUSSOTTI   +7 more
openaire   +2 more sources