用扫描电镜对夏棉中16胚珠纤维细胞进行观察，结果显示胚珠上纤维细胞的启动分化和发育在时间和部位上有一定顺序。胚珠表皮细胞启动分化为球形突起状的纤维细胞需要2～4h，胚珠上各部位纤维的发生顺序是：先从中部开始后向两端扩展，向胚珠合点扩展较快，向珠孔端扩展较慢，近珠孔瑞纤维发生最晚。 The observation of 16 ovules in summer cotton with scanning electron microscopy showed that the initiation and differentiation of fibroblasts on ovules were in a certain order in time and location. Ovule epidermal cells start to differentiate into spherical protuberant fibroblasts need 2 ~ 4h, ovules on each part of the order of occurrence of fiber is: first from the middle after the expansion to both ends of the expansion of the ovule to the point of rapid expansion to the end of the pore more than Slow, late Zhu Rui Rui fiber occurred late.