| Literature DB >> 3662521 |
A E Gardiol1, G L Truchet, F B Dazzo.
Abstract
Transmission electron microscopy was used to study the cellular morphologies of a wild-type Rhizobium meliloti strain (L5-30), a nitrogen fixation-ineffective (Fix-) succinate dehydrogenase mutant (Sdh-) strain, and a Fix+ Sdh+ revertant strain within alfalfa nodules and after free-living growth in a minimal medium containing 27 mM mannitol plus 20 mM succinate. The results showed a requirement of succinate dehydrogenase activity for symbiotic differentiation and maintenance of R. meliloti bacteroids within alfalfa nodules and for succinate-induced cellular pleomorphism in free-living cultures. Also, the Sdh- strain had a 3.5-fold lower rate of oxygen consumption in the defined medium than did the wild type.Entities:
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Year: 1987 PMID: 3662521 PMCID: PMC204031 DOI: 10.1128/aem.53.8.1947-1950.1987
Source DB: PubMed Journal: Appl Environ Microbiol ISSN: 0099-2240 Impact factor: 4.792