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Advances in the Genetics of Azospirillum
1985Bacteria of the genus Azospirillum are diazotrophs associated with the root of grasses, without formation of differentiated structure. Very little is known on the genetics of these bacteria and on the molecular biology of their association with plants. The bacteria, first described in 1922 by Beijerinck and rediscovered in 1963 by Becking, were called ...
C. Fogher +4 more
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Denitrification and nitrogen fixation by Azospirillum
Archives of Microbiology, 1985A model system is described where Azospirillum and germinated wheat seeds were grown in association for a week and then assayed for nitrogen fixation (C2H2-reduction) and denitrification (N2O-formation) activities. The association performed C2H2-reduction and N2O-formation under microaerobic conditions. Both activities were measurable after already 3–5
H. Bothe, A. Kronenberg, G. Neuer
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2015
The ability of Azospirillum to colonize the roots of plants depends on motility and chemotaxis. Azospirillum cells are motile and capable of chemotaxis toward organic acids, sugars, and some aminoacids. Azospirillum is also able to navigate gradients of oxygen, alternative electron acceptors, and redox active compounds.
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The ability of Azospirillum to colonize the roots of plants depends on motility and chemotaxis. Azospirillum cells are motile and capable of chemotaxis toward organic acids, sugars, and some aminoacids. Azospirillum is also able to navigate gradients of oxygen, alternative electron acceptors, and redox active compounds.
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Interaction of Azospirillum and Mycorrhiza
2015The AM fungi interact with Azospirillum directly by providing niche and/or habitat or indirectly by modifying host plant morphophysiology. This communication in soil can be beneficial for both the microorganisms and the host plant. The Azospirillum inoculation is more successful and more profitable when other microorganisms are co-inoculated with ...
Marta Berrocal-Lobo +2 more
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Applied Microbiology and Biotechnology, 2012
Azospirillum are prominent plant growth-promoting rhizobacteria (PGPR) extensively used as phytostimulatory crop inoculants, but only few studies are dealing with Azospirillum-containing mixed inocula involving more than two microorganisms. We compared here three prominent Azospirillum strains as part of three-component consortia including also the ...
Yvan Moënne-Loccoz +15 more
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Azospirillum are prominent plant growth-promoting rhizobacteria (PGPR) extensively used as phytostimulatory crop inoculants, but only few studies are dealing with Azospirillum-containing mixed inocula involving more than two microorganisms. We compared here three prominent Azospirillum strains as part of three-component consortia including also the ...
Yvan Moënne-Loccoz +15 more
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1980
Publisher Summary This chapter discusses the studies focusing on cultures of Spirillum lipoferum (Azospirillum). The recent isolation of the N2-fixing bacterium Azospirillum has initiated numerous investigations of this organism. Azospirillum can fix N2 either as a free-living organism or in association with plant roots.
S.L. Albrecht, Y. Okon
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Publisher Summary This chapter discusses the studies focusing on cultures of Spirillum lipoferum (Azospirillum). The recent isolation of the N2-fixing bacterium Azospirillum has initiated numerous investigations of this organism. Azospirillum can fix N2 either as a free-living organism or in association with plant roots.
S.L. Albrecht, Y. Okon
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Non-encapsulated mutants of Azospirillum brasilense and Azospirillum lipoferum
Canadian Journal of Microbiology, 1988A procedure is described for the isolation of mutants of Azospirillum brasilense strains Sp7 (ATCC 29145) and Sp245 and Azospirillum lipoferum Br1702, which are unable to differentiate from vegetative vibrioids into encapsulated C forms. It is based on the characteristic of mutants, designated Enc−, to develop into white colonies in a background of ...
Fernando Bastarrachea +2 more
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Cell-Surface Lectins of Azospirillum spp.
Current Microbiology, 1998Cell-surface lectins were screened in seven strains of Azospirillum brasilense and A. lipoferum. The presence of lectins was determined by particle agglutination assays employing latex beads coated with neoglycoproteins and by Western blot with neoglycoproteins labeled with horseradish peroxidase as a probe.
Yoav Bashan +2 more
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Biodegradation of polysaccharides by Azospirillum
1995Breakdown of plant polysaccharides by root colonising bacteria can provide them with new carbon sources. Within the genus Azospirillum, breakdown of pectin (and polygalacturonic acid) is best documented for A. irakense. From a gene library of A. irakense KBC1 we have isolated several cosmid clones that express polygalacturonase and pectate lyase ...
Veerle Keijers +3 more
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Acta Biotechnologica, 1990
AbstractThe effect of ammonium nitrogen on the growth and efficiency of nitrogen fixation by A. lipoferum and A. brasilense grown under various growth conditions was investigated.
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AbstractThe effect of ammonium nitrogen on the growth and efficiency of nitrogen fixation by A. lipoferum and A. brasilense grown under various growth conditions was investigated.
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