Variation in Preference for Rhizobium meliloti Within and Between Medicago sativa Cultivars Grown in Soil

摘要: Variation in nodulation preferences for Rhizobium strains within and between Medicago sativa cultivars was assessed the greenhouse with plants grown Leonard jars two soils of diverse origin (Lanark Ottawa), using inocula consisting effective individual or paired R. meliloti which could be recognized by high-concentration antibiotic resistance. The results indicated considerable variability host among but not cultivars. implications this variation are discussed from point view possible improvement symbiotic nitrogen fixation. With one exception, differences success inoculant were consistent both soils. All introduced formed significantly more nodules Renfrew soil containing few native rhizobia than Ottawa a large resident population. Plants Lanark without inoculation ineffectively nodulated yielded less growth those receiving inoculation. In contrast, yield inoculated did differ due to meliloti. data synergistic effects on certain strain relative same individually jars.