Akademik Veri Yönetim Sistemi
Journal of Crop Health, cilt.77, sa.1, 2025 (Scopus)
Cyclic 3‑Hydroxymelatonin (3-ohm), an important metabolite produced through melatonin interaction with oxygenated compounds, is believed to increase tolerance to various abiotic stress factors. However, the number of studies is limited. Therefore, this study investigated tolerance to salt stress in pepper (Capsicum annuum) seedling emergence tests using an exogenous 3‑ohm application. It was observed that the seedling emergence performance of peppers under salt stress conditions improved by 3‑ohm application as a pre-sowing seed treatment compared with the control treatment. 3‑ohm treatments decreased H2O2 (hydrogen peroxide) and Tbars (thiobarbituric acid reactive substances) contents in seedlings, whereas they increased catalase (CAT), peroxidase (POX), and superoxide dismutase (SOD) enzyme activities. In addition, the treatments positively affected total chlorophyll and proline content in seedlings. Considering the 3‑ohm concentrations used in this study, it was observed that 50 µM concentration was the most effective in most of the variables for which data were collected. Based on the results of this study, it can be concluded that the enhanced seedling emergence performance of pepper seeds is due to a reduction in the deterioration of lipid peroxidation in the tissues, which is caused by an increase in antioxidant enzyme activity. This study highlights the potential of 3‑ohm as an effective natural compound for increasing crop productivity and mitigating the negative effects of abiotic stress factors in agricultural applications. However, comparative studies using the most effective concentration of 3‑ohm (50 μM) in combination with melatonin are needed to reach more definitive conclusions. Future studies will also help elucidate the stress reduction effect of 3‑ohm in pepper.