摘要
用显微录相和计算机图像分析技术,观测了芦荟(Aloe zebrina Haw)花粉管生长和胞质颗粒的运动,观察到花粉管顶端的跳跃式生长现象,并且发现流向花粉管顶端的正向颗粒,其运动速度、直径、流量均大于流向花粉粒的反向颗粒,表明胞质颗粒运动在花粉管顶端生长中可能起着源源不断地运输'建筑材料'的作用。
The growth of pollen tube and the cytoplasmic particle movements in pollen tube of Aloe zebrina Haw.were recorded by micro-video and measured by computer image analysis.The saltatory growth of pollen tube was observed.The movement velocity,diameter and the rate of flux of forward particles towards pollen tu(?)e tip were greater than those of backward particles. The results indicate that the cytoplasmic particle movements may play a role in transporting 'building blocks' for pollen tube growth.
关键词
花粉管
生长
颗粒运动
Pollen tube growth
Saltatory growth
Forward and backward particles
Particle velocity
