نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه مراغه، مراغه
2 دانشجوی سابق کارشناسی ارشد گروه علوم و مهندسی خاک، دانشگاه مراغه
3 استاد گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه مراغه، مراغه
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Due to the inevitable entry of cadmium into the soils and its high toxicity, it is essential to prevent it from human food chains. Biofilm-forming plant growth-promoting bacteria with the ability of auxin production can prevent the transport of some heavy metals to plants. A hydroponic factorial experiment was designed based on a randomized complete block in three replications to investigate the effect of biofilm-forming plant growth-promoting bacterium and tryptophan on yield and cadmium uptake in Rye. Experimental factors include three levels of cadmium (zero, 50 and, 100 mg.L-1), two bacterial inoculation (with or without Bacillus atrophaeus) and, tryptophan (presence in 100 mgL-1 and absence). The results showed that the addition of tryptophan and bacterial inoculation could increase the yield of rye dry matter by 19% on average vs control. In addition, the co-applying of tryptophan with bacterial inoculation was able to reduce 100% and 62% of the cadmium concentration in rye aerial parts at 50 and 100 mg.L-1, respectively. The use of tryptophan by the improvement of the antioxidant system was able to reduce the amount of malondialdehyde and hydrogen peroxide at 50 mg.L-1 cadmium level up to 30 and 42%, and for 100 mg.L-1 cadmium by 34 and 32%, respectively. Therefore, it seems that with further studies, these treatments can be used to increase the yield and reduce the Cd entry into the food chain in the Cd-contaminated soils.
کلیدواژه‌ها [English]
)