The male catkins of 0～ -year-old Betula platyphylla were gathered and fixed by FAA fixation fluid in 99 The meiosis of microspore mother cells and male gametophytes' formation were studied with OLYMPUS microscope.
The male catkins of 0～ -year-old Betula platyphylla were gathered and fixed by FAA fixation fluid in 99 The meiosis of microspore mother cells and male gametophytes' formation were studied with OLYMPUS microscope.
99年以 0～ 年生白桦的雄性花序为材料，分期取样固定，利用OLYMPUS显微镜进行观察。