Proving of rhizobia’s other abilities in spite of Nitrogen fixation ability and considering these bacteria as plant growth promoting rhizobacteria (PGPR), researching tasks in this field have increased. Now, it’s completely proved that we can find such strains among many more strains of each rhizobial group that can also do effective process in plant growth promoting as plant growth hormones pr...

Rhizobia are soil-borne bacteria that form nodules with legume roots and convert nitrogen into ammonia. Legume plants are often a major part of native or agricultural ecosystems, which increas nitrogen in low fertility soils, e.g. saline soils. The major target of this study was to characterize salt-tolerant rhizobial strains with high symbiotic efficiency. We choose ten strains of rhizobia tha...

In a combined approach of phenotypic and genotypic characterization, 28 indigenous rhizobial isolates obtained from different chickpea growing regions in peninsular and northern India were analyzed for diversity. The field isolates were compared to two reference strains TAL620 and UPM-Ca142 representing M. ciceri and M. mediterraneum respectively. Phenotypic markers such as resistance to antibi...

BACKGROUND AND OBJECTIVES Interactions between plants and beneficial soil organisms (e.g. rhizobial bacteria, mycorrhizal fungi) are models for investigating the ecological impacts of such associations in plant communities, and the evolution and maintenance of variation in mutualisms (e.g. host specificity and the level of benefits provided). With relatively few exceptions, variation in symbiot...

In addition to forming symbiotic nodules on legumes, rhizobial strains are members of soil or rhizosphere communities or occur as endophytes, e.g., in rice. Two rhizobial strains which have been isolated from root nodules of the aquatic legumes Aeschynomene fluminensis (IRBG271) and Sesbania aculeata (IRBG74) were previously found to promote rice growth. In addition to analyzing their phylogene...

Rhizobial bacteria nodulate legume roots and fix nitrogen in exchange for photosynthates. These symbionts are infectiously acquired from the environment and in such cases selection models predict evolutionary spread of uncooperative mutants. Uncooperative rhizobia - including nonfixing and non-nodulating strains - appear common in agriculture, yet their population biology and origins remain unk...

Biological nitrogen fixation by Rhizobium -legume symbioses represents an environmentally friendly and inexpensive alternative to the use of chemical fertilizers in legume crops. Rhizobial inoculants, applied frequently as biofertilizers, play important role sustainable agriculture. However, inoculants often fail compete for nodule occupancy against native rhizobia with inferior nitrogen-fixing...

to characterize the distribution of melanin producing medicago-nodulating rhizobia in western and north-western of iran, 982 sinorhizobium isolates were trapped from a combination of three alfalfa populations (hamedani, nikshahri, kodi) and soil samples from eight sites across kurdestan, kermanshah, eastern azarbayjan and lorestan provinces. all rhizobial isolates were examined for their abilit...

Biodiversity of diazotrophic symbiotic bacteria in the tropics is a valuable but still poorly studied resource. The objective of this study was to determine if a second housekeeping gene, glnII, in addition to the 16S rRNA, can be employed to improve the knowledge about taxonomy and phylogeny of rhizobia. Twenty-three elite rhizobial strains, very effective in fixing nitrogen with twenty-one he...