异翅鸟模型种翼红蛾卵巢营养腔和卵泡上皮的结构

IF 2.2 3区 工程技术 Q1 MICROSCOPY
Anna Szczepankiewicz , Bożena Simiczyjew
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引用次数: 0

摘要

本文研究了异翅目模式种Pyrrhocoris apterus雌性性腺的组织和卵的发生过程。形态学、细胞化学和超微结构分析。所研究的昆虫的每一对卵巢包括7个远营养卵巢。单个子房由顶丝、滋养体、卵黄体和子房蒂组成。滋养体容纳形态多样的滋养细胞。在顶端部分有小的单个护理细胞,其中一些有丝分裂活跃。在这个区域以下,滋养细胞的细胞核进行无丝分裂。营养室的主要部分由含有几个滋养细胞核的细胞质裂片组成。每个叶通过细胞质延伸与营养核相连。在滋养体的基部有早期卵黄前卵母细胞和体细胞卵泡前细胞。卵泡囊内有不同发育阶段的卵母细胞,被卵泡细胞包围,较年轻的卵母细胞位于顶部,较老的卵母细胞位于基部。卵母细胞和滋养细胞之间的接触是由充满密集排列的微管的营养索维持的。索内有大量的核糖体和线粒体。滤泡上皮经历了一系列的变化,并分化成三个亚群。无翼大蠊卵巢的一般组织与其他异翅目代表昆虫相似。这些差异与滋养体的结构、卵泡的数量和生长速度以及卵泡上皮的分化过程有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structure of the trophic chamber and follicular epithelium in ovaries of the model heteropteran species Pyrrhocoris apterus
The studies concern organization of the female gonads and the course of oogenesis in the model species of Heteroptera, Pyrrhocoris apterus. Morphological, cytochemical and ultrastructural analyses were carried out. Each of the paired ovaries of the studied bug comprises seven telotrophic ovarioles. An individual ovariole is composed of the terminal filament, tropharium, vitellarium, and ovariole pedicle. The tropharium houses morphologically diversified trophocytes. In the apical part small individual nurse cells are located, some of them are mitotically active. Below this zone nuclei of the trophocytes divide amitotically. The main part of the trophic chamber is composed of cytoplasmic lobes containing several trophocyte nuclei. Each lobe connects with the trophic core by cytoplasmic extension. In the basal part of the tropharium early previtellogenic oocytes and somatic prefollicular cells occur. The vitellarium houses oocytes at different developmental stages, surrounded by follicular cells, with younger oocytes positioned apically and older ones basally. The contact between oocytes and trophocytes is maintained by nutritive cords filled with densely packed microtubules. Numerous ribosomes and mitochondria occur within the cords. The follicular epithelium undergoes a series of changes and diversifies into three subpopulations. The general organization of P. apterus ovarioles is similar to that described in other representatives of Heteroptera. The differences concern the structure of the tropharium, the number and growth rate of ovarian follicles and the course of differentiation of the follicular epithelium.
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来源期刊
Micron
Micron 工程技术-显微镜技术
CiteScore
4.30
自引率
4.20%
发文量
100
审稿时长
31 days
期刊介绍: Micron is an interdisciplinary forum for all work that involves new applications of microscopy or where advanced microscopy plays a central role. The journal will publish on the design, methods, application, practice or theory of microscopy and microanalysis, including reports on optical, electron-beam, X-ray microtomography, and scanning-probe systems. It also aims at the regular publication of review papers, short communications, as well as thematic issues on contemporary developments in microscopy and microanalysis. The journal embraces original research in which microscopy has contributed significantly to knowledge in biology, life science, nanoscience and nanotechnology, materials science and engineering.
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