摘要
大多数被子植物的卵器由卵细胞和2个助细胞组成,位于胚囊之中,呈三角形分布。在珠孔端这3个细胞与胚囊有共同的细胞壁。自从Jensen 60年代首先应用电子显微技术研究棉花的胚囊结构以来,已有近30种植物得到了详细的研究。
The main ultrastructure of synergids in mature embryo sac of Convolvulus arvensis L.was studied by means of electron microscope was the same as those previously reported.However, growth of many finger-like projections continuously distributed on the outer surface of synergids was observed.Exchange of material between central cell and synergids was enhanced by the transfer wall.The profile of endoplasmic reticulum which was long and parallelly arranged became shortened and randomly expanded.A narrow path appeared at the junction of egg and synergid.
关键词
箭叶旋花
助细胞
超微结构
Convolvulus arvensis
Synergid
Finger-like projections
