Impact of heavy metals on an arctic rhizobium
- Laurentian Univ., Sudbury, Ontario (Canada)
Bacteria belonging to the genus Rhizobium, when residing in the root nodules of leguminous plants, fix nitrogen and thus contribute very significantly to the global nitrogen and thus contribute very significantly to the global nitrogen budget. Although there is paucity of data concerning the effects of metal pollutants on these agronomically important organisms, their negative impact on the nitrogen fixing ability of these microbes is evident. As rhizobia from root nodules of arctic legumes have been demonstrated to contribute significantly to the ecological balance in this region, the impact of some metals, found in elevated amounts in acidic surroundings on this unique Rhizobium has been assessed. In this paper the ability of the microbe to tolerate abnormal levels of manganese and aluminum is reported and the effectiveness of iron in reversing cadmium toxicity is also discussed.
- OSTI ID:
- 5085684
- Journal Information:
- Bulletin of Environmental Contamination and Toxicology; (United States), Vol. 46:3; ISSN 0007-4861
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
METALS
BIOLOGICAL EFFECTS
RHIZOBIUM
METABOLISM
ALUMINIUM COMPOUNDS
ARCTIC REGIONS
CADMIUM COMPOUNDS
GLOBAL ASPECTS
LEGUMINOSAE
MANGANESE COMPOUNDS
NITROGEN FIXATION
BACTERIA
ELEMENTS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MICROORGANISMS
PLANTS
POLAR REGIONS
TRANSITION ELEMENT COMPOUNDS
560300* - Chemicals Metabolism & Toxicology