EFFECTS OF DIFFERENT POTASSIUM DOSES ON GROWTH AND DEVELOPMENT OF DROUGHT-SENSITIVE BEAN PLANTS | EFFECTS OF DIFFERENT POTASSIUM DOSES ON GROWTH AND DEVELOPMENT OF DROUGHT-SENSITIVE BEAN PLANTS

إنجليزي. Root, stem and leaf development are all negatively influenced by drought stress which causes losses in yieldand quality and ultimately serious economic losses for growers. This study was conducted to see the efficiencyof potassium treatments in reducing the negative effects drought stress on yield and quality of beans largelyconsumed in Turkey. Zulbiye bean cultivar sensitive to drought stress and V71 bean genotype which wasalso previously identified as sensitive to drought stress were used as the plant materials of the experiments.Bean seeds were sown in 2 L pots filled with perlite. Different potassium (K) doses of 0 (control) ppm K,500 ppm K, 100 ppm K and 2000 ppm K were applied to seed sown pots. Seeding was performed as tohave two plants in each pot and experiments were conducted in randomized blocks factorial experimentaldesign with 4 replications with 4 pots in each replication. Pots were irrigated with Hoagland nutrient solutionthroughout the experiments. Irrigations were totally terminated on 20th day for drought stress plants. Following15 days of stress conditions, plant height, fresh weight, root collar diameter, number of leaves and leafsize, leaf relative contents and membrane damage index values were determined. It was concluded based onpresent findings that 2000 ppm K treatment was more efficient in reducing the negative effects of droughtstress on investigated growth and development parameters.

تلميع. Root, stem and leaf development are all negatively influenced by drought stress which causes losses in yieldand quality and ultimately serious economic losses for growers. This study was conducted to see the efficiencyof potassium treatments in reducing the negative effects drought stress on yield and quality of beans largelyconsumed in Turkey. Zulbiye bean cultivar sensitive to drought stress and V71 bean genotype which wasalso previously identified as sensitive to drought stress were used as the plant materials of the experiments.Bean seeds were sown in 2 L pots filled with perlite. Different potassium (K) doses of 0 (control) ppm K,500 ppm K, 100 ppm K and 2000 ppm K were applied to seed sown pots. Seeding was performed as tohave two plants in each pot and experiments were conducted in randomized blocks factorial experimentaldesign with 4 replications with 4 pots in each replication. Pots were irrigated with Hoagland nutrient solutionthroughout the experiments. Irrigations were totally terminated on 20th day for drought stress plants. Following15 days of stress conditions, plant height, fresh weight, root collar diameter, number of leaves and leafsize, leaf relative contents and membrane damage index values were determined. It was concluded based onpresent findings that 2000 ppm K treatment was more efficient in reducing the negative effects of droughtstress on investigated growth and development parameters.