PHYSIOLOGICAL STUDY OF AZOTOBACTER CHROOCOCCUM, BEIJERINCKII AND VINELANDII TYPES

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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...

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Plasmids of Azotobacter vinelandii.

Four laboratory strains and two isolates of Azotobacter vinelandii were found to contain plasmids. Twenty-five laboratory strains which could fix nitrogen did not have free, covalently closed circular plasmid DNA. The plasmids varied in size from 9 to 52 megadaltons, and each strain yielded only one plasmid. No discernible differences in ability to fix nitrogen were found between plasmid-bearin...

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Ultrastructure of Azotobacter vinelandii.

Vegetative cells and cysts of Azotobacter vinelandii 12837 were prepared for electron microscopy by several methods assumed to preserve structural details destroyed by techniques previously reported in the literature. Examination of large numbers of cells and cysts by these methods revealed four structural details not reported previously: intine fibrils, intine vesicles, intine membrane, and mi...

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Genes in Azotobacter vinelandii

Azotobacter vinelandii contains a heterodimeric, membrane-bound [NiFelhydrogenase capable of catalyzing the reversible oxidation of H2. The 13 and at subunits of the enzyme are encoded by the structural genes hoxK and hoxG, respectively, which appear to form part of an operon that contains at least one further potential gene (open reading frame 3 1ORF3]). In this study, determination of the nuc...

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Nitrogenase in Azotobacter chroococcum and Klebsiella pneumoniae.

Blumberg, W. E. & Peisach, J. (1974) Arch. Biochem. Biophys. 162,502-512 Cammack, R. (1973) Biochem. Biophys. Res. Commun. 54,548-554 Cammack, R., Rao, K. K. & Hall, D. 0. (1971) Biochem. Biophys. Res. Commun. 44,s-14 Coffman, R. E. & Stavens, B. W. (1970) Biochem. Biophys. Res. Commun. 41,163-169 Fee, J. A. & Palmer, G. (1971) Biochim. Biophys. Actu 249,175-195 Genonde, Ic, Schlaak, M. E., Bri...

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ژورنال

عنوان ژورنال: Journal of Bacteriology

سال: 1923

ISSN: 0021-9193,1098-5530

DOI: 10.1128/jb.8.6.521-531.1923