Agrobacterium tumefaciens is a diazotrophic bacterium

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Applied and Environmental Microbiology; (USA)

OSTI ID:5957225

Kanvinde, L; Sastry, G R.K. ^[1]

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1. Univ. of Leeds (England)

This is the first report that Agrobacterium tumefaciens can fix nitrogen in a free-living condition as shown by its abilities to grown on nitrogen-free medium, reduce acetylene to ethylene, and incorporate {sup 15}N supplied as {sup 15}N{sub 2}. As with most other well-characterized diazotrophic bacteria, the presence of NH{sub 4}{sup +} in the medium and aerobic conditions repress nitrogen fixation by A. tumefaciens. The system requires molybdenum. No evidence for nodulation was found with pea, peanut, or soybean plants. Further understanding of the nitrogen-fixing ability of this bacterium, which has always been considered a pathogen, should cast new light on the evolution of a pathogenic versus symbiotic relationship.

• OSTI ID: 5957225
• Journal Information: Applied and Environmental Microbiology; (USA), Journal Name: Applied and Environmental Microbiology; (USA) Vol. 56:7; ISSN 0099-2240; ISSN AEMID
• Country of Publication: United States
• Language: English

Related Subjects

553003* -- Agriculture & Food Technology-- Pest & Disease Control-- (1987-)
60 APPLIED LIFE SCIENCES
AMMONIUM COMPOUNDS
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
NITROGEN 15
NITROGEN FIXATION
NITROGEN ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
PATHOGENS
PLANT DISEASES
STABLE ISOTOPES
TRACER TECHNIQUES