ارزیابی واکنش گیاهان چغندرقند پرایم شده با عوامل زیستی و شیمیایی به ویروس ایرانی پیچیدگی بوته چغندر

Sugar beet (Beta vulgaris subsp. vulgaris) is an important industrial plant from the Chenopodiaceae family, cultivated in temperate and subtropical climates. This plant is the second main source of sucrose production in the world after sugarcane. In the agricultural year of 2017-2018, the area under sugar beet cultivation in Iran was 120 thousand hectares and the production of this product was seven and a half million. Several pathogens such as fungi, bacteria, viruses and nematodes infect sugar beet. Beet curly top Iran virus (Becurtovirus betae) is one of the main causes of beet curly top disease in sugar beet and some other dicotyledonous plants in Iran, which annually damages these products. The present study aimed to investigate the effect of treating sugar beet seeds with Bacillus subtilis, Trichoderma harzianum and β-amino butyric acid chemical resistance stimulator on the growth and increasing the resistance of sugar beet to beet curly top Iran virus in a completely randomized design. The results obtained regarding leaf surface traits, scoring the severity of disease symptoms, plant height and plant chlorophyll measurement showed that seed treatment with Trichoderma harzianum had the greatest effect on leaf surface traits, the seed treatment with Bacillus subtilis had the greatest effect on plant height. Regarding the severity of the symptoms, the control treatment which was only inoculated with the virus showed the most severe symptoms and the treatment with T. harzianum showed the least severity of the viral disease symptoms. Also, the analysis of the chlorophyll measurement data of plants of different treatments indicated the lowest amount of chlorophyll in the control treatment and the highest amount of chlorophyll in the T. harzianum treatment. Measuring the activity of plant defense enzymes and virus accumulation in plants from different treatments is currently in progress.