摘要
应用扫描电镜研究了一种游仆虫皮层纤维结构。结果显示,口围带托架由横向组排在一起的小膜托架单元组成,每个小膜托架是由40—50nm直径的纤维编织成的长方形薄片,波动膜托架是横向平行排列和纵向平行排列的两部分共60多股纤维交错编织成的网状结构;额腹横棘毛区表膜下含有纵纤维层、球形纤维层和深部纤维层三层纤维,其纵纤维层在相应于游仆虫皮层脊(或脊和唇)之间的表膜下方被纵沟分成几部分;背面表膜下含有纵纤维层,这层纤维下似乎也有球形纤维层。此外,作者也推测了这些皮层纤维结构在游仆虫皮层形态的保持,支持纤毛器和纤毛器运动及形态发生等方面的作用。
The structures of the cortical fibers revealed by biochemical technique of de-membrane in Euplotes sp. has been studied by means of scanning electron microscopy. It is observed that: ( 1 ) AZM (adoral zone of membranelles) bracket consists of the membranelle brackets ranged in parallel transversally. Each of the membranelle brackets is a rectangular sheet of fibers in which each fiber has a diameter of 40-50 nm. (2) UM (undulating membrane) bracket consists of over sixty strands of fibers in which a portion of fibers are parallel to one another transversally and another portion longitudinally. The two portions of, fibers are woven into the shape of a network. (3 ) There are three layers of fibers, i. e. the longitudinal fibers, the spherule-coiled fibers and the deep fibers. Beneath the pellicle of the FVTC (fronto-ventro-transversc cirri) region, the layer of longitudinal fibers is divided into several sections by longitudinal ditches just lying beneath the pellicle between the cortical shoulders (or, between the shoulder and the lip). (4) There is also a layer of longitudinal fibers beneath the pellicle of dorsal cortex, and there seems to be a layer of spherule-coiled fibers under the layer of longitudinal fibers. The structures of the cortical fibers arc evaluated for possible functions of cortex-shaping, support, movement and morphogenesis of ciliary organelles, etc.
关键词
游仆虫
皮层
纤维
扫描电镜
Euplotes sp., Cortical fiber, Bracket
