Document Type : Research Paper
Authors
1 Department of Plant Protection, Faculty of Agriculture, Lorestan University, Khoramabad, Iran
2 Professor of plant protection, Department of Plant Protection, Faculty of Agriculture, Lorestan University, Khoramabad, Iran
3 Assistant professor, Department of Plant Protection, Faculty of Agriculture, Lorestan University, Khoramabad, Iran
Abstract
Objective: Every year, wheat is affected by various fungal diseases, including Fusarium blight. grains inoculation with native PGPR is a suitable approach in health management, improving productions and their quality. Methods: To evaluate bioinhibition ability and activity of antioxidant enzymes peroxidase and catalase by endophytic bacteria in resistant and sensitive genotypes of wheat infected with FHB, a factorial experiment in the form of a completely randomized design was done in spring, 2022 at Faculty of Agriculture, Lorestan University. The experimental treatments include four strains of Pseudomonas brassicacearum, Pseudomonas sp., Exiguobacterium sp., Acinetobacter calcoaceticus and their mixture. Results: The results showed among four isolates the highest percentage of inhibiting growth of fungi was related to P. brassicacearum isolate with a value of 49.33%. The activity of antioxidant enzymes both in the infected resistant and susceptible cultivar at different times after inoculation with fungus increased significantly compared to control. The mixed treatment of bacteria+ resistant cultivar+ infected showed the highest average activity of catalase with an average of 12.41 and treatment B3+ sensitive cultivar+ control with an average of 3.59 showed the lowest average catalase activity. Also, the mixed treatment of bacteria+ resistant cultivar+ infected showed the highest average of 1.93 and the B3+ sensitive cultivar+ control treatment showed the lowest average of peroxidase enzyme activity with an average of 0.58. Conclusion: Considering the high efficiency of the bacterial strains used in increasing the activity antioxidant enzymes and their antifungal activity can considered as a suitable option in production of healthy plants.
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