吸口凿开绦虫头节体被、细胞器和神经感受器超微结构的研究  

ON THE ULTRASTRUCTURE OF THE SCOLEX TEGUMENT, ORGANELLES AND SENSORY RECEPTORS OF GLARIDACRIS CATOSTOMI COOPER (CESTODA: CARYOPHYLLIDEA)

作　　者：李敏敏[1] H.P.荒井 

机构地区：[1]中国科学院动物研究所 [2]加拿大卡尔加里大学生物学系

出　　处：《动物学报》1991年第2期113-122,共10页ACTA ZOOLOGICA SINICA

摘　　要：作者利用扫描和透射两种电镜详细研究了吸口凿开绦虫(Glaridacris catostomi Cooper,1920)头节体被、细胞器(微毛、结构小体、长形颗粒、线粒体)和神经感受器的超微结构,并将它们与其他绦虫类,尤其是与石竹科Caryophyllidae中的近缘种类的同类细胞器进行了比较。发现绦虫体被细胞器的超微结构具有属的特性。Glaridacris catostomi Cooper, 1920 is one of the widely distributed tapeworms belonging to Caryophyllidea in North America. Often G. catostomi can be found in the same host with Hunterella nodulosa Mackiewicz & McCrae, 1962 from different parts of the intestine.Materials used for the present paper was obtained from the white sucker Catostomus commersoni (Lacepede) collected from Chain Lakes, Alberta, Canada.1. Microthrix consists of spine, baseplate and shaft. Spine tapering posteriorly is elongated oval shaped and electron dense in cross section. Electron lucent shaft is round or ovate in cross profile. The two parts mentioned above are separated by a baseplate which is electron dense with lamellated substructure. The microthrix is entirely covered by an outer and an inner double plasma membranes. Beneath the inner plasma membrane of the shaft a layer of concentration electron dense matrix and 10—14 microfilamental subunits can be seen in longitudinal section. The microfilamental subunits are connected by septa.2. Structured bodies are produced by the neck cells deeply embedded in the parenchyma of the scolex-neck region of the worm. In cross section the structured bodies have round lucent areas at both ends and faintly lucent 'dots'. These 'dots' are hexagonal subunits arranged regularly in 2 to 5 rows, each row containing 9—16 subunits which are similar to those seen in the rod-shaped bodies in H. nodulosa and C. laticeps (Hayunga & Mackiewicz, 1975; Richards & Arme, 1981). in longitudinal section the structured bodies appear oval form with long unique electron lucent areas on both margins. The structured bodies are filled with distinct striations (hexagonal subunits) underlying the lucent areas. The structured bodies of G. catostomi can be easily distinguished from those of H. nodulosa and C. laticeps and other cestodes by their shapes and also by the presence of unique electron lucent areas.3. Elongated granules produced also by the neck cells are rod-shaped with both ends slightly swollen. The elongated

关 键 词：吸口凿开绦虫 细胞器 超微结构 

分 类 号：Q959.156[生物学—动物学]