UV-B Işın Uygulamalarının Domates ve Hıyar Fidelerinde Bitki Besin Maddesi İçeriğine Etkileri

In this study, the effects of UV-B irradiation on plant nutrition content in tomato and cucumber seedlings were investigated. For this purpose, tomato (Solanum lycopersicum L. cv. Alsancak-RN F1) and cucumber (Cucumis sativus L. cv. Cakir F1) seedlings were subjected to control (0 kJ m-2 days-1), 10.8 kJ m-2 days-1 (low dose) and 16.2 kJ m-2 days-1 (high dose) UV-B irradiation for the first 10 days (76.5 min day-1 and 114.75 min day-1 respectively) since they were the first true leaves. In the research, nitrogen, potassium, phosphorus, calcium, iron, magnesium, manganese, and zinc content, as well as the amount of H2O2 in the leaves were identified in seedling roots and above-ground parts. Depending on UV-B irradiation, It has been determined that potassium content decreased in tomato seedling roots and the effect is higher in high dose UV-B irradiation compared to low dose. While UV-B applications reduce the amount of potassium in the root; It was determined that high dose application increases the potassium content in the upper part and low dose application decreasing effect. Low dose UV-B applications, tomato seedling root, and upper parts have also shown phosphorous content increasing effect. High dose UV-B application was caused an increase in the amount of calcium in the root and upper parts of cucumber seedlings. It also had an effect on increasing zinc content in the root. It was determined that as the application dose increases, the amount of H2O2 in cucumber seedling leaves increases.