This experiment was conducted in 2010 at the research field of Islamic Azad University, Takestan branch, Iran, to evaluate the effects of Mycorrhiza, Pseudomonas and chemical phosphorus on sunflower yield, quality and P uptake. The study was conducted in factorial in the form of a randomized complete block design with four replications and three factors: phosphorus (0, 50 and 100 kg/ha), Mycorrhiza (with and without inoculation) and Pseudomonas (with and without inoculation). Results indicated that phosphorus, Mycorrhiza and Pseudomonas significantly affected all the measured traits, except for the effect of Pseudomonas which was not significant on the weight of filled grains, oil yield and grain yield. The three-fold interaction had only a significant effect on plant dry weight. 100 kg P/ha × Mycorrhiza × Pseudomonas increased plant dry weight by 91.32% compared with the control.
