Effect of combined inoculation of Azospirillum brasilense and vesicular-arbuscular mycorrhiza on pearl millet (Pennisetum americanum)

Growth and phosphorus uptake of pearl millet (Pennisetum americanum) on an unsterile, phosphorus-deficient soil was improved by the seed inoculation with Azospirillum brasilense or soil inoculation with the vesicular-arbuscular mycorrhizal fungi (Acaulospora, Gigaspora margarita, Glomus fasciculatum). These microorganisms acted synergistically when added simultaneously and the response was significant with Azospirillum brasilense + Gigaspora margarita and Azospirillum brasilense + Glomus fasciculatum combinations over uninoculated control as far as the dry matter content of shoots, root biomass and phosphorus uptake of the millet was concerned.