Article Abstract:
Temperature-responsive genetic loci have been studied in the plant pathogen Pseudomonas syringae pv. glycinea, a bacterial blight pathogen of soybean plants. Plant-pathogenic bacteria may sense variations in environmental factors to adapt to plant-associated habitats during pathogenesis or epiphytic growth. Plant inoculations showed that three mutants tests were inhibited in symptom development and in planta multiplication rates. The study suggested that all identified loci showed a somewhat slow induction of expression under temperature-change conditions.
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Article Abstract:
The roles of Amt and AmtB in the various ammonium uptake systems in Corynebacterium glutamicum, a Gram positive soil bacterium used in industrial production of amino acids, have been studied. Amt has been found to mediate uptake of methylammonium into the cell with high affinity. The process is strictly dependent on the membrane potential. Hints of another, not known until now, low-affinity ammonium-specific uptake system were seen. Ammonium and methylammonium are substrates of Amt. AmtB accepts only ammonium as a transport substrate.
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Article Abstract:
Toxinotyping and PCR ribotyping of Clostridium difficile strains have been compared and novel toxinotypes described.A large PCR ribotype library of c. difficile strains was screened to find more information on prevalence of variant strains and emergence of novel toxinotypes.
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