选取颗粒饱满、大小均一的苦荞麦种子，用0.5%的KMnO4浸泡20 m

Tartary buckwheat seeds with full grain size and uniform size were selected, soaked with 0.5% KMnO4 for 20 min, washed with distilled water, and then transferred to a white porcelain plate after soaking for 24 h, covered with white gauze to moisturize and germinate in a dark incubator for 24 h. After the seeds were exposed, the radicles were inserted into the pure agar medium outward, 15 capsules per bottle, screwed on the lid, and cultured upside down in a dark incubator at 25 ℃ [19]. The materials are randomly divided into two groups:

Select the grain-rich, the size of the same bitter buckwheat seeds, with 0.5% KMnO4 soaked 20 min, distilled water clean, soaked 24 h after transfer to the white porcelain plate, spread white gauze moisturizing, in the dark incubator to germinate 24 h. After the seeds have been exposed, the root is inserted outward into a pure agar medium, 15 capsules per bottle, tightening the lid, and inverting the culture in a dark incubator at 25 degrees C. Randomly divide the material into two groups:

Select buckwheat seeds with full particles and uniform size, soak them in 0.5% KMnO4 for 20 min, clean them with distilled water, transfer them to the white porcelain plate after soaking for 24 h, spread white gauze to keep moisture, and accelerate germination in the dark incubator for 24 h. After the seeds are exposed to white, the radicle is inserted into the pure agar medium, 15 seeds in each bottle, the lid is screwed tightly, and the culture is inverted in the dark incubator at 25 ℃ [19]. Materials were randomly divided into two groups: