Ramus J
Department of Biology, Osborn Memorial Laboratories Yale University, New Haven, Connecticut 06520.
J Phycol. 1969 Mar;5(1):57-63. doi: 10.1111/j.1529-8817.1969.tb02577.x.
Pit connection formation in the marine red alga Pseudogloiophloea confusa was studied with the electron microscope. The process of formation occurs in 2 stages. First, a septum forms as an annular ingrowth from the lateral walls. Lomasomes are associated with the centripetal accretion of wall material. The completed septum contains a large rimmed aperture, bounded by the continuous plasmalemma, and through which the cytoplasm is continuous from cell to cell. In the second stage, a highly structured plug is formed which completely blocks the aperture. The plug is condensed on flattened vesicles which lie parallel to one another and which traverse the aperture. The mature plug is composed of granules 50-100 A in diameter and surrounded by several dense layers which appear to enclose an 80 A limiting membrane. Once the pit connection is formed, no material is seen to traverse it.
利用电子显微镜研究了海洋红藻拟隐脉藻中纹孔连接的形成过程。形成过程分两个阶段进行。首先，隔膜作为从侧壁向内生长的环形结构形成。边体与细胞壁物质的向心积累有关。完整的隔膜包含一个大的有边缘的孔，由连续的质膜界定，细胞质通过该孔在细胞间连续。在第二阶段，形成一个高度结构化的塞子，它完全堵塞了孔。塞子在彼此平行且穿过孔的扁平囊泡上凝聚。成熟的塞子由直径为50 - 100埃的颗粒组成，并被几层致密层包围，这些致密层似乎包围着一层80埃的限制膜。一旦纹孔连接形成，就看不到有物质穿过它。
