Effects of PGPR and mycorrhiza on morphological traits and yield components of wheat under different lead levels.

The problems associated with heavy metal Pollution are widespread and are particular ordinary in more developed countries. Phytoremediation is a non-destructive method of heavy metal-polluted soils. Although the numerous issues of this technology have not been widespread surveyed yet. To evaluate the effect of Plant Growth Promoting Rhizobacteria (PGPR) and mycorrhiza on seed weight, yield components and morphological traits of wheat, an experiment was done during 2012-2013 in Islamic Azad University, Karaj Branch, as factorial based on completely randomized design with 4 replications. The lead amounts in 4 levels (0 , 300, 600 and 900 mg/kg of soil), PGPR (Azosperillium, Azotobacter, Pseudomonas) in 2 levels (Application and non application) and mycorrhiza in 2 levels (Application and non application) were considered. The lead concentration decrease was noticed in all the growth parameters as the maximum anti stress efficiency was obtained from PGPR consumption for wheat height (45.93 cm), spike length (7.63 cm), spike weight (14.86 g), spikelet number in spike (12.82), seed number in spike (37.14) and seed weight in wheat (1.27 g). The maximum reduction (% of control) was noticed under the influence of higher dose of Pb (900 mg /kg) and non application of PGPR and mycorrhiza.