Cadmium uptake and nitrogen fixing ability in heavy-metal-resistant laboratory and field strains of Rhizobium leguminosarum biovar trifolii
Article
Purchase, D., Miles, R. and Young, T. 1997. Cadmium uptake and nitrogen fixing ability in heavy-metal-resistant laboratory and field strains of Rhizobium leguminosarum biovar trifolii. FEMS Microbiology Ecology. 22 (1), pp. 85-93. https://doi.org/10.1111/j.1574-6941.1997.tb00359.x
Type | Article |
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Title | Cadmium uptake and nitrogen fixing ability in heavy-metal-resistant laboratory and field strains of Rhizobium leguminosarum biovar trifolii |
Authors | Purchase, D., Miles, R. and Young, T. |
Abstract | Rhizobium leguminosarum bv. trifolii produced mucoid colonies on yeast mannitol agar, but non-mucoid colonies appeared with a frequency of 10−7 on agar additionally containing 4 mM ZnCl2. Cells producing non-mucoid colonies were also obtained from root nodules of white clover from experimental field plots treated with heavy-metal-contaminated sewage sludge. Compared to mucoid strains, non-mucoid strains produced approximately half of the extracellular polysaccharide, two to three fold higher levels of intracellular carbohydrate and possessed larger intracellular inclusions. They also showed up to two-fold times greater resistance to Cd2+, Cu2+, Ni2+ and Zn2+. The total uptakes of Cd2+ were similar between the laboratory strains and amongst the field strains. In non-mucoid strains, Cd2+ was not removed by washing in 0.1 M HNO3, suggesting Cd2+ was bound intracellularly. All strains were effective in fixing nitrogen in white clover. |
Keywords | Rhizobium leguminosarum biovar trifolii; heavy metal resistance; cadmium uptake; nitrogen fixation |
Sustainable Development Goals | 15 Life on land |
Middlesex University Theme | Sustainability |
Publisher | Oxford University Press (OUP) |
Journal | FEMS Microbiology Ecology |
ISSN | 0168-6496 |
Electronic | 1574-6941 |
Publication dates | |
01 Jan 1997 | |
Publication process dates | |
Accepted | 21 Oct 1996 |
Deposited | 31 Jan 2024 |
Output status | Published |
Digital Object Identifier (DOI) | https://doi.org/10.1111/j.1574-6941.1997.tb00359.x |
Scopus EID | 2-s2.0-0031023362 |
Web of Science identifier | WOS:A1997WF95300009 |
Related Output | |
Has metadata | http://europepmc.org/abstract/AGR/IND20576597 |
Language | English |
https://repository.mdx.ac.uk/item/9706v
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