Determining The Effect of Stratification Methods on The Germination of Tetradium Daniellii Seeds

Tetradium daniellii (syn. Evodia hupehensis Dode), commonly known as the bee-bee tree or Korean evodia, is a fast-growing deciduous tree that produces fragrant flowers in the summer, a time when few other trees are in bloom. Due to the extreme hardness of Tetradium daniellii seeds, special pre-sowing treatments were applied. The internal structure of the seeds was studied by preparing anatomical sections. In order to determine the effects of initial treatments—i.e., stratification methods—on seed germination, experiments were conducted. These experiments were carried out using three different variants:1.Control – without any pre-treatment; 2.Four cycles of freezing (-18°C) and thawing (at 24°C, room temperature); 3.Soaking in warm water at 40°C for 24 hours. During the experiments, the germination rate, germination energy, and viability indicators of the seeds under each variant were determined. In this article, laboratory observations were also conducted by placing the seeds in a thermostat at temperatures of +15°C, +20°C, +25°C, and +30°C to determine the effect of temperature on Tetradium daniellii seed germination. The results are presented accordingly.