This study was carried out in Alcanar (Tarragona - Spain) to evaluate the effect of five indolebutyric acid (IBA) concentrations (0.0; 0.5; 1.0; 1.5; 2.0 g/L) and inoculation with arbuscular mycorrhizae fungi (AMF) (Glomus intraradices Schenck & Smith) on Carrizo citrange (Citrus sinensis (L.) x Poncirus trifoliata (L.) Raf.) vegetative development, P and K foliar contents and root morphology. The experimental design was in a Completly Randomized Block Design with 10 seedlings per plot and 4 replicates. The IBA concentrations had no effect on vegetative development of nonmycorrhizal seedlings, althougt it had increased P and K foliar contents and primary xylem tickness. AMF increased P foliar content. IBA x AMF interaction was observed, increasing IBA concentrations on mycorrhizal seedlings resulted in increased in vegetative development, P and K foliar contents and primary xylem thickness.
auxins; mycorrhizal fungi; mineral nutrition; citrus
