تاثير قارچ اندوميكوريز بر سيستم دفاعي آنتي اكسيدان و رنگيزه هاي گياه پسته تحت تنش شوري

Influence of arbuscular mycorrhizae on antioxidant defense systems, and pigments content of pistachio plants under salt stress

Salinity in soil or water is of importance for agriculture because it limits a distribution of higher plants in certain natural habitats and induces a wide range of adverse metabolic response in them. The influence of arbuscular mycorrhizal (AM) fungus Glomus etunicatum on characteristics of growth, antioxidant enzymes, such as catalase(CAT), peroxidase(PX), flavonoids, cartenoides and chlorophyll content of Pistacia vera under salt stress was studied in the greenhouse. Pistachio plants were grown in sterilzed, sand and soil mixture with G.etunicatum inoculum with four NaCl levels (0, 50, 100, and 200 mM) for 90 days. Root length colonized percent was higher in control plant than treated plants with different salt concentration. Under salt stress, mycorrhizal pistachio plants had higher growth, higher antioxidant enzymes activity, higher flavonoids, and chlorophyll content, compared with non-mycorrhizal plants. All of the results show that G. etunicatum alleviates the deleterious effect of salt stress on plant growth through improving pigments content and antioxidant defense systems.