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Showing 2 results for Sarabi

Mahdi Motamedi, Kambiz Azizpour, Vahid Sarabi, Rana Valizade Kamran,
Volume 10, Issue 1 (8-2021)
Abstract

Despite the negative effects of salinity on plants, due to the limited area under cultivation, planting a variety of plants in saline lands is inevitable. Among them, okra is one of the plants that few studies have been done on its response to different levels of salt. Therefore, in order to study the effect of salinity levels on Okra (Abelmoschus esculentus Moench), an experiment was designed based on a randomized complete block design with five treatments including concentration of 0, 50, 100, 150 and 200 mM sodium chloride in three replications at the greenhouse of the faculty of agriculture, Shahid Madani University of Azarbaijan. The results showed that by increasing salinity levels, potassium to sodium ratio, chlorophyll a, relative water content, plant dry weight, number of fruits per plant, fruit weight per plant, number of seeds per plant, seeds weight per plant and 1000 grains weight have decreased but amount of sodium and proline have increased. During the experiment, the plants under 200 mM treatment have died shortly after salinization, but plants under other treatments survived until the end of the experiment and produced the yield. Maintaining high potassium content, low reduction in chlorophyll content and no noticeable change in relative water content were factors that led to continuance of plant growth, dry matter and fruit production at different salt concentrations. Although in terms of number of fruits per plant, there was no significant difference between salinity levels and the control, but a significant decrease in fruit weight per plant was recorded at high salt concentrations, especially under 150 mM, which can be an important factor affecting economic yield of okra in saline environments with EC higher than 10 ds/m.

Akbar Shirzad, Rogaie Habibi, Vahid Fallahzadeh, Vahid Sarabi,
Volume 13, Issue 2 (11-2024)
Abstract

Root rot and seedling blights of beans caused by Rhizoctonia solani is one of the most important fungal diseases in beans. In this study, the inhibitory effect of Trichoderma harzianum biocontrol isolate and Bioguard biological product was investigated in vitro and greenhouse conditions on the pathogenic fungus R. solani in 2020. The effect of treatments on disease inhibition, plant growth indices, chlorophylls and carotenoids content and peroxidase, phenylalanine-ammonialyase enzymes were studied. The results of in vitro assay showed that although Bioguard significantly prevented the growth of pathogenic mycelium in the culture medium, however, the treatment of Trichoderma harzianum showed more efficient with 51% inhibition rate. In greenhouse studies, both T. harzianum and Bioguard treatments had a significant effect on disease control. In terms of the effect on plant growth indicators, Bioguard had the highest stem and root fresh weight as well as stem and root length. In terms of chlorophyll content of bean leaves and carotenoids content, both Bioguard and Trichoderma treatment with pathogenic fungus R. solani showed a significant difference with the diseased control plant. Bioguard and Trichoderma antagonist fungus treatments together with pathogenic fungus led to the highest activity of phenylalanine ammonialyase and peroxidase enzymes and had statistically significant differences with Bioguard and T. harzianum alone treatments. Therefore, it is recommended to use both Trichoderma harzianum fungus and Bioguard as a commercial product in the occurrence of bean rhizoctonia root rot disease.
 

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دوفصل نامه علمی-پژوهشی مهندسی ژنتیک و ایمنی زیستی Genetic Engineering and Biosafety Journal
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