| phenotypical and genotypical characteristics of root-nodulating bacteria isolated from annual medicago spp. in soummam valley (algeria). | in the framework of agro-pastoral system management using local annual medics coupled with their native root-nodulating bacteria to extend pasture zones, increase forage yields and improve ovine and bovine breeding in algeria, we investigated diversity of rhizobia from annual medicago spp. (medicago arabica, medicago polymorpha, medicago minima and medicago orbicularis). | 2006 | 16478510 |
| [the effect of medicago spp. on growth of trichophyton mentagrophytes in microculture]. | the study aimed at assessing effect of dried root and aerial parts of medicago spp. on growth of trichophryton mentagrophytes. fungus strains were inoculated onto microcultures with sabouraud agar supplemented each with 1 g of dried and pulverised roots or aerial parts of 3 species: medicago arabica, m. sativa, and m. murex. the strongest inhibitory effect on t. mentagrophytes growth was that of aerial parts of m. arabica (median diameter 6 mm compared to 13 mm of control), followed by root of m ... | 2001 | 16886436 |
| paraffinic hydrocarbons in pasture plants. | the gas chromatographicmass spectrometric technique recently developed by ryhage has been applied to the analysis of paraffins extracted from pasture plants, specifically, whole plant and leaves of spotted bur clover (medicago arabica). normal alkanes from c(18) to c(35) have been found. the c(29), c(31), and c(33) normal saturated hydrocarbons predominate and n-c(31) is the major component. in the range from c(24) to c(34) the ratio of alkanes with an even number of carbon atoms to those with a ... | 1965 | 17793563 |
| sinorhizobium meliloti chemotaxis to quaternary ammonium compounds is mediated by the chemoreceptor mcpx. | the bacterium sinorhizobium meliloti is attracted to seed exudates of its host plant alfalfa (medicago sativa). since quaternary ammonium compounds (qacs) are exuded by germinating seeds, we assayed chemotaxis of s. meliloti towards betonicine, choline, glycine betaine, stachydrine and trigonelline. the wild type displayed a positive response to all qacs. using lc-ms, we determined that each germinating alfalfa seed exuded qacs in the nanogram range. compared to the closely related nonhost speci ... | 2017 | 27748981 |
| contribution of individual chemoreceptors to sinorhizobium meliloti chemotaxis towards amino acids of host and nonhost seed exudates. | plant seeds and roots exude a spectrum of molecules into the soil that attract bacteria to the spermosphere and rhizosphere, respectively. the alfalfa symbiont sinorhizobium meliloti utilizes eight chemoreceptors (mcpt to mcpz and icpa) to mediate chemotaxis. using a modified hydrogel capillary chemotaxis assay that allows data quantification and larger throughput screening, we defined the role of s. meliloti chemoreceptors in sensing its host, medicago sativa, and a closely related nonhost, med ... | 2016 | 26713349 |
| simulation of germination of pioneer species along an experimental drought gradient. | the germination of ten plant species from the iberian peninsula was assessed along a water deficit gradient between -0. 1652 (moist) and -0.4988 mpa (dry) of osmotic potential, created by addition of increasing concentrations of polyethylene glycol (peg 6000) to distilled water in which plants were grown hydroponically. the level and rate of germination of daucus carota and thapsia villosa significantly decreased with decreasing psi. seeds of dactylis glomerata and dittrichia viscosa had positiv ... | 2006 | 17405330 |
| seed germination in response to chemicals: effect of nitrogen and ph in the media. | seed germination generally presents a peak in the next growing season after a fire. among other factors associated with fire are the increase of soil nitrogen and changes in the ph of the soil. in this study, we addressed the question, whether or not the germination response of eight species is linked with the increase in ph and nitrogenous compounds in the germination media? we assessed the separate and combined effects of nitrogenous compounds and ph on the percentage and rate of germination o ... | 2006 | 16850869 |