| fluorescent pseudomonads associated with the phyllosphere of grasses; pseudomonas trivialis sp. nov., pseudomonas poae sp. nov. and pseudomonas congelans sp. nov. | strains of fluorescent pseudomonads, isolated from the phyllosphere of grasses, were analysed by a polyphasic approach in order to clarify their interspecific position. classification on the basis of ribotyping revealed six genotypes; four of these, which could be differentiated clearly from each other and from pseudomonas species with validly published names on the basis of phenotypic features, were chosen for detailed phylogenetic analysis. dna-dna hybridization studies among representative st ... | 2003 | 13130034 |
| volatiles of bacterial antagonists inhibit mycelial growth of the plant pathogen rhizoctonia solani. | bacterial antagonists are bacteria that negatively affect the growth of other organisms. many antagonists inhibit the growth of fungi by various mechanisms, e.g., secretion of lytic enzymes, siderophores and antibiotics. such inhibition of fungal growth may indirectly support plant growth. here, we demonstrate that small organic volatile compounds (vocs) emitted from bacterial antagonists negatively influence the mycelial growth of the soil-borne phytopathogenic fungus rhizoctonia solani kühn. s ... | 2007 | 17180381 |
| characterization of phosphate-solubilizing fluorescent pseudomonads from the rhizosphere of seabuckthorn growing in the cold deserts of himalayas. | isolation and characterization of fluorescent pseudomonads with high phosphate-solubilizing ability is reported from the alkaline and calcium-rich soils with low p availability in the cold desert region of lahaul and spiti in the trans-himalayas of india. of 216 phosphate-solubilizing isolates, 12 exhibiting high solubilization of tricalcium phosphate (tcp) in nbrip liquid culture were identified as pseudomonas trivialis, p. poae, p. fluorescens, and pseudomonas spp. on the basis of phenotypic f ... | 2008 | 17909886 |
| assessment of transformability of bacteria associated with tomato and potato plants. | transformation of plant-associated bacteria by plant dna has never been demonstrated in agricultural fields. in total 552 bacterial isolates from stems of ralstonia solanacearum-infected and healthy tomato plants and from stems and leaves of healthy potato plants were tested for natural genetic competence using plasmid psktg dna and homologous dna extracts. control strain acinetobacter baylyi adp1 was transformable with both dna extracts. no transformable isolates were observed after treatment w ... | 2007 | 17961482 |
| effect of bacterial antagonists on lettuce: active biocontrol of rhizoctonia solani and negligible, short-term effects on nontarget microorganisms. | the aim of this study was to assess the biocontrol efficacy against rhizoctonia solani of three bacterial antagonists introduced into naturally rhizoctonia-infested lettuce fields and to analyse their impact on the indigenous plant-associated bacteria and fungi. lettuce seedlings were inoculated with bacterial suspensions of two endophytic strains, serratia plymuthica 3re4-18 and pseudomonas trivialis 3re2-7, and with the rhizobacterium pseudomonas fluorescens l13-6-12 7 days before and 5 days a ... | 2008 | 18248441 |
| stress tolerance and genetic variability of phosphate-solubilizing fluorescent pseudomonas from the cold deserts of the trans-himalayas. | nineteen efficient phosphate-solubilizing fluorescent pseudomonas from the cold deserts of the trans-himalayas were screened for stress tolerance against temperature, alkalinity, salinity, calcium salts, and desiccation. phylogenetic analysis based on 16s rrna gene sequencing placed these bacteria under three groups with fourteen strains in group i including pseudomonas trivialis and p. poae, two strains in group ii together with pseudomonas kilonensis and p. corrugata, and three strains in grou ... | 2009 | 19319589 |
| strain-specific colonization pattern of rhizoctonia antagonists in the root system of sugar beet. | to develop effective biocontrol strategies, basic knowledge of plant growth promotion (pgp) and root colonization by antagonists is essential. the survival and colonization patterns of five different biocontrol agents against rhizoctonia solani ag2-2iiib in the rhizosphere of greenhouse-grown sugar beet plants were analysed in single and combined treatments. the study included bacteria (pseudomonas fluorescens l13-6-12, pseudomonas trivialis re(*) 1-1-14, serratia plymuthica 3re4-18) as well as ... | 2010 | 20618857 |
| the growth of fungi and arabidopsis thaliana is influenced by bacterial volatiles. | dual culture systems, which only allowed volatiles to cross the boundary of a bipartite petri dish, were used to investigate the effects of bacterial volatiles on the growth of 14 fungi and a. thaliana. the majority of tested combinations exhibited dramatic growth retardations of fungi and a. thaliana, indicating that volatiles can act as antibiotics. it therefore can be concluded that bacterial volatiles influence the growth conditions of organisms in a community and in a habitat. | 2008 | 19704493 |
| environmental monitoring of bacterial contamination and antibiotic resistance patterns of the fecal coliforms isolated from cauvery river, a major drinking water source in karnataka, india. | the present study focuses prudent elucidation of microbial pollution and antibiotic sensitivity profiling of the fecal coliforms isolated from river cauvery, a major drinking water source in karnataka, india. water samples were collected from ten hotspots during the year 2011-2012. the physiochemical characteristics and microbial count of water samples collected from most of the hotspots exhibited greater biological oxygen demand and bacterial count especially coliforms in comparison with contro ... | 2015 | 25896199 |
| antibacterial metabolites synthesized by psychrotrophic bacteria isolated from cold-freshwater environments. | the ability of three psychrotrophic gram-negative bacilli isolated from chilean patagonian cold freshwater rivers to produce bioactive metabolites was evaluated. the strains were isolated from cold waters rivers and identified by their biochemical properties and 16s rrna gene analysis. the metabolites fractions showing antibacterial activity were obtained by solvent extraction and partially characterized by gas-mass chromatography (gc-ms). antibacterial activity of the fractions was evaluated by ... | 2013 | 22886611 |
| complete genome sequence of the rhizobacterium pseudomonas trivialis strain ihbb745 with multiple plant growth-promoting activities and tolerance to desiccation and alkalinity. | the complete genome sequence of 6.45 mb is reported here for pseudomonas trivialis strain ihbb745 (mtcc 5336), which is an efficient, stress-tolerant, and broad-spectrum plant growth-promoting rhizobacterium. the gene-coding clusters predicted the genes for phosphate solubilization, siderophore production, 1-aminocyclopropane-1-carboxylate (acc) deaminase activity, indole-3-acetic acid (iaa) production, and stress response. | 2015 | 26337878 |
| statistical optimization of medium components for mass production of plant growth-promoting microbial inoculant pseudomonas trivialis bihb 745 (mtcc5336). | optimizing nutritional requirements for mass production of microbial inoculants in shortened time has relevance for their economical field application. therefore, the present study aimed at selecting suitable growth medium, optimizing its components, and up-scaling inoculum production for plant growth-promoting pseudomonas trivialis bihb 745. of the different media tested, the culture exhibited maximal viable colony count in trypticase soya broth with 17.6 % increased biomass on optimizing level ... | 2014 | 25320429 |
| formulation development of the deleterious rhizobacterium pseudomonas trivialis x33d for biocontrol of brome (bromus diandrus) in durum wheat. | to develop an appropriate formulation of the deleterious rhizobacterium pseudomonas trivialis x33d and to evaluate its effectiveness to reduce brome growth. | 2013 | 23051924 |