The existence of various pollutants such as hydrocarbons in soil and water for human and environmental health is a serious threat. Regarding environmental contamination by organic and inorganic contaminants over the last 25 years, many physical and chemical methods have been used to clean ecosystems, which is often accompanied by high costs. Hence, nowadays environmental biologic sources are used to clean contaminated sites with different types of pollutants. Some plants can accumulate in whole or in part pollutants in the soil, petroleum products, sediments, underground, surface and air, which is referred to as the plant accumulation process. These plants use a variety of plant biologic processes and their physical properties to help reduce and eliminate contamination. In this research, the purpose of selecting a common straw plant is that, in addition to the high absorption efficiency of the pollutant in conditions of saturation and restoration of contaminated areas, it is native to the country and especially to oil-rich regions. This leads to a more reliable recovery of these areas. For this purpose, a research was conducted to investigate the effect of indices of growth and establishment of common straw plants in contaminated soils in the presence of an extract of seaweed and mycorrhizal fungi in a factorial arrangement based on a completely randomized block design in the Isfahan University of Technology. Experiment with 7 treatments including petroleum hydrocarbons in two levels of control and 10% by weight, mycorrhizal fungus in three levels of control, Rhizophagus irregularis and Funneliformis mosseae and seaweed extract of Ascophyllum nodosum at four levels of control: 0.25, 0.51 and 0.75, 0 milliliters per liter in 4 replays was implemented in March 1395. Applying the treatments in a mixture and homogenizing the oil with the weight in weight, mixing the mycorrhiza species with the surface soil of the pots, and adding the solution of the seaweed extract to the plant's nose every 10 days. In this experiment, height, density, texture, fresh weight and dry weight of shoot and root, root and shoot volume, number of rhizomes, chlorophyll content, ion leakage and relative water content, proline, an activity of antioxidant enzymes, Microbial respiration, mycorrhizal coexistence, total hydrocarbon concentrations were evaluated. In general, the results of the experiment showed that the treatment of seaweed and mycorrhizal fungi reduced and significantly increased some of the morphological and physiological indices relative to the control and the resistance of this plant to various biological and non-biological stresses from contaminants It turned out Also, since this plant has a high resistance to unconventional water, it will be possible to exploit wastewater and unconventional water for the development of greenery using this plant. Keywords : Seaweed extract, Petroleum hydrocarbons, Mycorrhiza, Greeace, Normal straw