| Isolation and characterization of mutants of cowpea Rhizobium defective in nitrate uptake system. | |
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MedLine Citation:
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PMID: 6194663 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In this communication, two mutants of cowpea Rhizobium CB756 (NR-18 and NR-23), defective in nitrate uptake system, were described. They failed to grow in a medium where nitrate was the sole source of nitrogen and unable to show nitrate reductase activity in cell suspensions. However, they showed nitrate reductase activity (to the level of wild type) in cell-free extract preparations. Thus it appears that in these mutants, the transport genes of nitrate uptake were affected and the synthesis of nitrate induced permease, as its role in nitrate uptake is indicated here, is defective. |
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Authors:
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R K Singh; R M Singh |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Acta microbiologica Polonica Volume: 32 ISSN: 0137-1320 ISO Abbreviation: Acta Microbiol. Pol. Publication Date: 1983 |
Date Detail:
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Created Date: 1983-11-23 Completed Date: 1983-11-23 Revised Date: 2005-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7610362 Medline TA: Acta Microbiol Pol Country: POLAND |
Other Details:
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Languages: eng Pagination: 31-5 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biological Transport Genes, Bacterial* Membrane Transport Proteins / genetics Mutation Nitrate Reductases / metabolism Nitrates / metabolism* Rhizobium / genetics, metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Membrane Transport Proteins; 0/Nitrates; EC 1.7.-/Nitrate Reductases |
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