(一)在干净无色透明的小瓶(废弃的青霉素或其他小瓶)内加入半瓶清水.把脱脂棉弄成“7”字形,下端伸人水中,上端膨大的部分封瓶口,并将吸涨的小麦2-3粒放在瓶口,与棉花挤住(图),放于温暖处,2-3天可见胚根下扎.此法可清晰观察胚各部的发育及根毛着生 (A) Add half a bottle of clean water to a clean, colorless and transparent vial (waste penicillin or other vial), make the cotton wool into a “7” shape, with the lower end extending into the water and the enlarged upper part of the bottle, Sprouted 2-3 grains of wheat placed on the bottle, and cotton crowded (Figure), put in a warm place, 2-3 days radicle can be seen under the bar. This method can clearly observe the development of embryos and root hair students