摘要
钩刺斜管虫口和体纤毛器演化模式是研究该类动物个体发生的优秀模型。通过跟踪研究,澄清了后仔虫口器发生以及体纤毛器起源上的几点疑问,并证实:体左侧二列片段动基列为同源再造而非来自老结构的分裂或复制;三列围口纤毛均为双动基列构造;后仔虫口原基场的构建系由5列体动基列共同参与完成的,其中最左侧两列短的原基片段与原基1整合为一体,从而发展成营养朗虫体的外围口动基列;后仔虫背触毛原基为独立发生。
The stomatogenesis and cortical development during the cell ontogeny in Chilodonella uncinata Ehrenberg, 1838 have been investigated. In stomatogenesis five somatic kineties are involved. Each of them produces one kinetofiagment. These kinetofragments are anla-gen-complexes for the oral kineties and cyrtos. The somatic monokinetid is the elementary unit of stomatogenesis.The basic characteristics of the morphogenesis of Chilodonella uncinata are similar to those exhibited by most cyrtophorids: the old oral apparatus remains in the proter; the new oral primordium (OP) of opisthe originates from the left somatic kineties.The morphogenesis starts with the appearence of the anlage of dorsal kinety (DBA). The primordium field is situated in the left field of the somatic ciliature. The five innermost left kineties segment and develop one kinetoframent (anlage) each, which are numbered 1 to 5 from right to left (in the figure 2:A only 3 anlagen are marked). Kinetofragment 1 is the anlage of the preoral kinety and kinetofragment 2 is the anlage of the inner circumoral kinety. Together the kinetoframents 3, 4 and 5 are the anlage of the outer circumoral kinety.
出处
《动物学报》
SCIE
CAS
CSCD
1997年第1期90-95,共6页
ACTA ZOOLOGICA SINICA
基金
国家自然科学基金
杰出青年基金
关键词
纤毛虫
钩刺斜管虫
细胞
发生
无性生殖
纤毛器
Ciliophora, Chilodonella uncinata, Cortical developmenti Morphogenesis
