Cell surface characteristics of two halotolerant strains of Sinorhizobium meliloti
نویسندگان
چکیده
منابع مشابه
A Sinorhizobium meliloti lipopolysaccharide mutant altered in cell surface sulfation.
The Rhizobium-legume symbiosis involves the formation of a novel plant organ, the nodule, in which intracellular bacteria reduce molecular dinitrogen in exchange for plant photosynthates. Nodule development requires a bacterial signal referred to as Nod factor, which in Sinorhizobium meliloti is a beta-(1,4)-linked tetramer of N-acetylglucosamine containing N-acyl and O-acetyl modifications at ...
متن کاملSymbiotic characteristics of cysteine and methionine auxotrophs of Sinorhizobium meliloti.
Twenty one cysteine and 13 methionine auxotrophs of Sinorhizobium meliloti Rmd201 were obtained by random mutagenesis with transposon Tn5. The cysteine auxotrophs were sulfite reductase mutants and each of these auxotrophs had a mutation in cysI/cysJ gene. The methionine auxotrophs were metA/metZ, metE and metF mutants. One hundred per cent co-transfer of Tn5-induced kanamycin resistance and au...
متن کاملGenetic relationship of Sinorhizobium meliloti and Sinorhizobium medicae strains isolated from Caucasian region.
Sinorhizobium meliloti and Sinorhizobium medicae are two closely related species of the genus Sinorhizobium showing a similar host range, nodulating leguminous species of the genera Medicago, Melilotus and Trigonella, but their phylogenic relationship has not been elucidated yet. In this paper we report the application of three different molecular markers, (i) RFLP of nodD genes, (ii) 16S-23S r...
متن کاملCbrA is a stationary-phase regulator of cell surface physiology and legume symbiosis in Sinorhizobium meliloti.
Sinorhizobium meliloti produces an exopolysaccharide called succinoglycan that plays a critical role in promoting symbiosis with its host legume, alfalfa (Medicago sativa). We performed a transposon mutagenesis and screened for mutants with altered succinoglycan production and a defect in symbiosis. In this way, we identified a putative two-component histidine kinase associated with a PAS senso...
متن کاملGenome Sequence of Sinorhizobium meliloti Rm41
Sinorhizobium meliloti Rm41 nodulates alfalfa plants, forming indeterminate type nodules. It is characterized by a strain-specific K-antigen able to replace exopolysaccharides in promotion of nodule invasion. We present the Rm41 genome, composed of one chromosome, the chromid pSymB, the megaplasmid pSymA, and the nonsymbiotic plasmid pRme41a.
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ژورنال
عنوان ژورنال: Microbiological Research
سال: 2003
ISSN: 0944-5013
DOI: 10.1078/0944-5013-00195