Effects of Different Ca²⁺ Concentrations on Seed Germination and Root Growth of Taraxacum mongolicum and Taraxacumkok-saghyz

【Objective】 To study the response of seed germination and root growth to different concentrations of Ca²⁺ and elucidate the response characteristics of seed and root to Ca²⁺. 【Method】 In this study, we used theTaraxacum mongolicum strain Huangpu and Taraxacumkok-saghyz strain Kegen in Xinjiang as materials, In 2020, the laboratory experiment was carried out Institute of Crop Germplasm Resources, Xinjiang Academy of Agricultural Sciences. 【Result】 Compared with CK, 0.04 mol/L Ca²⁺ treatment had no significant effect on the germination rate, germination potential and germination index of Huangpu and Kegen. The germination parameters of other Ca²⁺ treatments decreased with the increase of concentration. The total length, surface area and volume of roots decreased gradually with the increase of Ca²⁺ concentration. The fine root length (diameter (d) < 0.5 mm) of Kegen was larger than that of Huangpu under 0.04 and 0.08 mol/L Ca²⁺ concentrations. 【Conclusion】 The root growth adaptability of Huangpu and Kegen is different under different Ca²⁺ concentrations. Especially at the concentration of 0.04 and 0.08 mol/L Ca²⁺, the fine root length of Kegen is longer than that of Huangpu, and the germination rate of Kegen is higher than that of Huangpu.