Phytohormone and Growth Response of Soybean to Indigenous Glomus sp. inoculation in sterile and unsterile soil conditions
A green house experiment was conducted to investigate the influence of an Arbuscular Mycorrhizal fungal (Glomus sp.) on the phytohormone and growth response of Soybean (Glycine max L. Merr) in sterile and unsterile soil conditions. Randomized complete block design with three replications was used for the green house experiments. The volume of phytohormone obtained were significantly higher (7.05-70.43mg/100ml) in sterilised soil than unsterilised (6.77-52.73mg/100ml). Glomus (7.5155.68mg/100ml) inoculated soil gave higher phytohormone than uninoculated (5.18-37.73mg/100ml) soil. Auxin level was highest in all treatment 63.64mg/100ml, followed by Absciscic acid 60.55mg/100ml and Gibberellins 7.75mg/100ml was the lowest. Leaf area, leaf number, plant height, root length, number of nodules dry matter of root, dry matter of stem and dry matter of leaf increased significantly (P<0.05) in Glomus inoculated soil than non inoculated soil and also in unsterilised soil than sterilised soil. All parameters increased with days of planting.