Effect of Phosphate Solubilizing Bacteria and Mycorrhizal fungi on some activities of antioxidative enzymes, physiological characteristics of wheat under dry land conditions

In order to study the effect of phosphate solubilizing bacteria (PSB) and mycorrhizal fungi on activities of antioxidative enzymes and physiological characteristics of wheat under dry land conditions, an experiment was carried out using factorial arrangement based on randomized complete block design with three replications at two locations (Agricultural Research Station of Ilam University and Sarableh Agricultural and Research, Recourses Center) during 2013-2014 cropping season. Experiment factors consisted of wheat factor at two levels (Keras Sablan and Saji) and fertilizer sources treatment at eight levels including of 1- without application of phosphorous chemical fertilizer, 2- 50 kg/ha phosphorous chemical fertilizer, 3- pseudomonas putida (PSB), 4- Glomus mosseae (GM), 5-PSB, 6-PSBᣏ kg/ha phosphorous chemical fertilizer, 7- PSB 25 kg/ha phosphorous chemical fertilizer and 8- GM kg/ha phosphorous chemical fertilizer. Results indicated that interaction effect of cultivar×fertilizer sources on some activities of antioxidative enzymes and physiological characteristics were effect at 1% probability level. So that, Saji cultivar×Glomus mosseae kg/ha phosphorous chemical fertilizer had the highest APX (14.6 u/mg protein), POD (15.4 u/mg protein), SOD (23.6 u/mg protein), chlorophyll a (44.3 mg mL-1), chlorophyll b (43.6 (mg mL-1), proline (4.5 μm g-1), RWC (71.3%), WUE (6.3 kg/mm) and decreased MAD (18 μmolg-1d.w) and Keras Sabalan cultivar and check treatment (without application of phosphorous chemical fertilizer) had the lowest APX, POD, SOD and photosynthetic pigment. Therefore, with the selection of suitable and responding cultivar to bio-fertilizers sources can lead to improvement of growth and grain yield by increasing the activities of antioxidative enzymes and physiological characteristics under dry land conditions.