Saito Kelly Cristina, Bechara Gervásio Henrique, Nunes Erika Takagi, de Oliveira Patricia Rosa, Denardi Sandra Eloisi, Mathias Maria Izabel Camargo
Departamento de Biologia, I.B., Universidade Estadual Paulista Júlio de Mesquita Filho, Av. 24 A, No. 1515 Cx, Postal 199, CEP 13506-900, Rio Claro, SP, Brasil.
Vet Parasitol. 2005 May 15;129(3-4):299-311. doi: 10.1016/j.vetpar.2004.09.020.
This study presents the morphology of the ovary, as well as the dynamics of the vitellogenesis process in oocytes of the cattle-tick Boophilus microplus. The ovary of these individuals is of the panoistic type; therefore, it lacks nurse cells. This organ consists of a single tubular structure, continuous, and composed of a lumen delimitated by a wall of small epithelial cells with rounded nuclei. In this tick species, the oocytes were classified into six stages varying from I to VI and according to: cytoplasm appearance and presence of the germ vesicle, yolk granules, and chorion. Oocytes of various sizes and at different developmental stages remain attached to the ovary through a cellular pedicel until completing stage V. Afterwards, they are liberated into the lumen and from there to the exterior. Some oocytes (classified as type VI) showed an atypical appearance indicating that some of the cellular components would be undergoing a degenerative process and/or reabsorption.
本研究展示了微小牛蜱卵巢的形态以及卵母细胞中卵黄发生过程的动态变化。这些个体的卵巢为无滋式；因此，它没有营养细胞。该器官由单一的管状结构组成，连续且由一个管腔构成，管腔由具有圆形细胞核的小上皮细胞壁界定。在这种蜱类物种中，卵母细胞被分为从I到VI的六个阶段，依据是：细胞质外观以及生殖泡、卵黄颗粒和卵壳的存在情况。各种大小和处于不同发育阶段的卵母细胞通过细胞柄附着在卵巢上，直至完成V阶段。之后，它们被释放到管腔中，再从那里排出到体外。一些卵母细胞（分类为VI型）呈现出非典型外观，表明一些细胞成分正在经历退化过程和/或重吸收。
