Mutations in Symbiotic Effectiveness in Rhizobium trifolii Caused by Transforming DNA and Other Agents
نویسندگان
چکیده
منابع مشابه
Respiratory Enzyme Systems in Symbiotic Nitrogen Fixation: III. The Dehydrogenase Systems of Rhizobium trifolii and Rhizobium leguminosarum.
Earlier studies on the respiratory systems in symbiotic nitrogen fixation (Wilson, 1938) indicated that the root nodule bacteria (Rhizobium spp.) reduce methylene blue anerobically in the presence of many organic compounds. With few exceptions, the efficiency of a given substrate as a hydrogen donator was approximately the same whether molecular oxygen or methylene blue was used as the hydrogen...
متن کاملTransposon mediation allows a symbiotic plasmid of Rhizobium leguminosarum bv. trifolii to become a symbiosis island in Agrobacterium and Rhizobium.
The symbiotic plasmid (pSym) of Rhizobium leguminosarum bv. trifolii 4S5, which carries Tn5-mob, was successfully transferred into Agrobacterium tumefaciens A136 by using a conjugation method. The resulting transconjugants induced the development of ineffective nitrogen-fixing nodules on the roots of white clover seedlings. Depending on the manner in which the pSym was retained, the transconjug...
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چکیده ندارد.
15 صفحه اولSymbiotic effectiveness of bacteriocin producing and non-producing strains of Rhizobium in green gram (Vigna radiata).
Rhizobium strains nodulating green gram [Vigna radiata (L.) Wilczek] were found to produce bacteriocin on modified Bergersen's medium and inhibited the growth of homologous Rhizobium strains. Four bacteriocin producing and four bacteriocin non-producing strains were compared for their effect on nodulation, in planta nitrogenase activity and plant dry weight of green gram. The bacteriocin produc...
متن کاملDeletion mutations caused by DNA strand slippage in Acinetobacter baylyi.
Short nucleotide sequence repetitions in DNA can provide selective benefits and also can be a source of genetic instability arising from deletions guided by pairing between misaligned strands. These findings raise the question of how the frequency of deletion mutations is influenced by the length of sequence repetitions and by the distance between them. An experimental approach to this question...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1965
ISSN: 0022-1287
DOI: 10.1099/00221287-40-3-377