Lyu Qi-Hui, Zhang Bei-Bei, Hua Bao-Zhen
State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of the Education Ministry, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China.
State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of the Education Ministry, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China.
Arthropod Struct Dev. 2018 Mar;47(2):173-179. doi: 10.1016/j.asd.2018.02.001. Epub 2018 Feb 15.
The fine structure of the seminal vesicle and reproductive accessory glands was investigated in Bittacidae of Mecoptera using light and transmission electron microscopy. The male reproductive system of Bittacidae mainly consists of a pair of testes, a pair of vasa deferentia, and an ejaculatory sac. The vas deferens is greatly expanded for its middle and medio-posterior parts to form a well-developed seminal vesicle. The seminal vesicle is composed of layers of developed muscles and a mono-layered epithelium surrounding the small central lumen. The epithelium is rich in rough endoplasmic reticulum and mitochondria, and secretes vesicles and granules into the central lumen by merocrine mechanisms. A pair of elongate mesodermal accessory glands opens into the lateral side of the seminal vesicles. The accessory glands are similar to the seminal vesicle in structure, also consisting of layers of muscle fibres and a mono-layered elongated epithelium, the cells of which contain numerous cisterns of rough endoplasmic reticulum and mitochondria, and a few Golgi complexes. The epithelial cells of accessory glands extrude secretions via apocrine and merocrine processes. The seminal vesicles mainly serve the function of secretion rather than temporarily storing spermatozoa. The sperm instead are temporarily stored in the epididymis, the greatly coiled distal portion of the vas deferens.
利用光学显微镜和透射电子显微镜对长翅目蚊蝎蛉科昆虫精囊及生殖附属腺的精细结构进行了研究。蚊蝎蛉科昆虫的雄性生殖系统主要由一对睾丸、一对输精管和一个射精囊组成。输精管在其中部和中后部大幅膨大，形成一个发育良好的精囊。精囊由多层发达的肌肉和围绕中央小腔的单层上皮组成。上皮富含粗面内质网和线粒体，并通过局部分泌机制向中央腔分泌小泡和颗粒。一对细长的中胚层附属腺开口于精囊的侧面。附属腺在结构上与精囊相似，也由多层肌纤维和单层细长上皮组成，其细胞含有大量粗面内质网池、线粒体和一些高尔基体复合体。附属腺的上皮细胞通过顶浆分泌和局部分泌过程排出分泌物。精囊主要起分泌作用，而非临时储存精子。精子反而临时储存在附睾中，附睾是输精管高度盘绕的远端部分。
