| stress tolerance and symbiotic and phylogenic features of root nodule bacteria associated with medicago species in different bioclimatic regions of tunisia. | thirty two rhizobial isolates were obtained from different bioclimatic regions of tunisia using as trap plants, medicago sativa, medicago ciliaris, medicago polymorpha and medicago minima. to study their diversity and characterize them in relation to mediterranean conditions, abiotic stress resistance, symbiotic properties and genetic diversity in terms of 16s rrna and noda sequences were assessed. five isolates from m. sativa, three from m. ciliaris and three from m. minima could grow at 45°c. ... | 2011 | 21487201 |
| involvement of source-sink relationship and hormonal control in the response of medicago ciliaris - sinorhizobium medicae symbiosis to salt stress. | in order to explore the relationship between leaf hormonal status and source-sink relations in the response of symbiotic nitrogen fixation (snf) to salt stress, three major phytohormones (cytokinins, abscisic acid and the ethylene precursor 1-aminocyclopropane-1-carboxylic acid), sucrose phosphate synthase activity in source leaves and sucrolytic activities in sink organs were analysed in two lines of medicago ciliaris (salt-tolerant tnc 1.8 and salt-sensitive tnc 11.9). snf (measured as nitroge ... | 2012 | 22453803 |
| symbiotic diversity of ensifer meliloti strains recovered from various legume species in tunisia. | ensifer meliloti (formerly sinorhizobium meliloti) was first considered as a specific microsymbiont of medicago, melilotus and trigonella. however, strains of e. meliloti were recovered from root nodules of various legume species and their symbiotic status still remains unclear. here, we further investigate the specificity of these strains. a collection of 47 e. meliloti strains isolated in tunisia from root nodules of medicago truncatula, medicago sativa, medicago ciliaris, medicago laciniata, ... | 2009 | 19665858 |
| genetic diversity of sinorhizobium populations recovered from different medicago varieties cultivated in tunisian soils. | a collection of 468 rhizobial isolates was obtained from different ecological areas of tunisia by trapping them on medicago sativa cv. gabes, medicago scutelleta cv. kelson, medicago truncatula, and medicago ciliaris. a subsample of 134 rhizobia was chosen to determine their plasmid profile, and 89 isolates were subjected to multilocus enzyme electrophoresis (mlee) and pcr/rflp analysis using 16s, igs (inter genic spacer), and nifkd probes. twenty-five representatives from these isolates were ev ... | 2001 | 11261493 |