Growth and development responses of some legume species inoculated with a mycorrhiza-based biofertilizer

摘要

The application of beneficial microorganisms can enhance the growth of crops and increase theiryields. In this context, we analysed the growth and development responses of six legume speciesinoculated by the mycorrhiza-based bio-fertilizer “Stanes Symbion? VAM Plus” in greenhouseconditions. The effect of inoculation by Symbion VAM on legumes growth and developmentdepends on the species and the cultivar used. A significant increase of shoot fresh weight,number of nodules and root dry weight was observed in common bean, pea and alfalfa,respectively. The most positive effect of inoculation was observed with the A17 Medicagotruncatula line, which showed an increase in shoot and root dry weights, in nodule and podnumbers, and an early blooming. However, chickpea and lentil inoculated plants didn’t show anyincrease for all measured growth and development traits. This positive effect of inoculation onA17 line by the Symbion VAM biofertilizer was associated with important mycorrhiza rootcolonization (21 to 40%) in comparison to the other legume cultivars at 50 days post inoculation.This study suggests that the success of inoculation with mycorrhiza-based inoculants depends onseveral factors including the density of inoculants in infective propagules and the length oflegume life cycle.