Akademik Veri Yönetim Sistemi
Turkish Journal of Agriculture and Forestry, cilt.48, sa.5, ss.760-774, 2024 (SCI-Expanded)
Drought is an important factor causing decreased productivity and quality in plant cultivation. Stress tolerance in plants can be increased, or damage can be reduced through various exogenous applications. One of them is flavonoids, which play an essential role in responding to stress through changes occurring at the endogenous level in plants due to drought stress. The effects of an exogenous treatment of chrysin, a member of the flavonoid group, on tomato seedlings grown under water deficit were examined in this study. Different doses (C0: control with no treatment; C1: 0.1 mM; C2: 0.5 mM; and C3: 1.0 mM) of chrysin solutions were applied to plant leaves under full irrigation (100% field capacity (FC)) and water deficit (60% FC). The treatment effects were investigated in terms of numerous biochemical, physiological, and morphological properties, as well as their bioactive components. It was determined that the adverse effects of drought stress on plants were alleviated by chrysin, and positive results were obtained, especially with applications at 0.5 and 1.0 mM doses. With drought, plant fresh weight, plant dry weight, root fresh weight, root dry weight, plant height, stem diameter, and leaf relative water content decreased by 35%, 56%, 23%, 20%, 25%, 12%, 24%, and 10%, respectively; however, the same reductions under drought with chrysin treatment were lower. While the abscisic acid content increased with water stress, the various treatments suppressed this increase. The effect of these applications is also thought to occur through plant antioxidant activity, phenolic compounds, and osmoprotectants such as amino acids, sugar, and organic acids. The changes in bioactive components due to the chrysin treatment decreased the rate of damage from stress. This study is one of the first to examine chrysin applications to the tomato; however, it would be useful to detail the research at the molecular level in future studies to understand the effectiveness of this treatment in all its aspects.