title: Ultra- and microstructure of the female reproductive system of Matsucoccus matsumurae.
abstract: The ultra- and microstructure of the female reproductive system of Matsucoccus matsumurae was studied using light microscopy, scanning and transmission electron microscopy. The results revealed that the female reproductive system of M. matsumurae is composed of a pair of ovaries, a common oviduct, a pair of lateral oviducts, a spermatheca and two pairs of accessory glands. Each ovary is composed of approximately 50 telotrophic ovarioles that are devoid of terminal filaments. Each ovariole is subdivided into an apical tropharium, a vitellarium and a short pedicel connected to a lateral oviduct. The tropharium contains 8-10 trophocytes and two early previtellogenic oocytes termed arrested oocytes. The trophocytes degenerate after egg maturation, and the arrested oocytes are capable of further development. The vitellarium contains 3-6 oocytes of different developmental stages: previtellogenesis, vitellogenesis and choriogenesis. The surface of the vitellarium is rough and composed of a pattern of polygonal reticular formations with a center protuberance. The oocyte possesses numerous yolk spheres and lipid droplets, and is surrounded by a mono-layered follicular epithelium that becomes binucleate at the beginning of vitellogenesis. Accessory nuclei are observed in the peripheral ooplasm during vitellogenesis.
authors.affiliation: School of Life Science, Shanxi University, Wucheng Road 92#, Taiyuan, Shanxi 030006, China.
authors.forename: Weimin
authors.initials: W
authors.lastname: Liu
authors.affiliation: School of Life Science, Shanxi University, Wucheng Road 92#, Taiyuan, Shanxi 030006, China. Electronic address: xieyingping@eyou.com.
authors.forename: Yingping
authors.initials: Y
authors.lastname: Xie
authors.affiliation: School of Life Science, Shanxi University, Wucheng Road 92#, Taiyuan, Shanxi 030006, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Dong
authors.affiliation: School of Life Science, Shanxi University, Wucheng Road 92#, Taiyuan, Shanxi 030006, China.
authors.forename: Jiaoliang
authors.initials: J
authors.lastname: Xue
authors.affiliation: School of Life Science, Shanxi University, Wucheng Road 92#, Taiyuan, Shanxi 030006, China.
authors.forename: Fen
authors.initials: F
authors.lastname: Tian
authors.affiliation: Jinhua Forest Pest Quarantine Station, Yongkang Street 205#, Jinhua, Zhejiang 321017, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Wu
mesh_terms: D000818:Animals; D002681:China; D005260:Female; D006430:Hemiptera / Q000166:cytology / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010053:Ovary / Q000166:cytology / Q000648:ultrastructure; D010057:Oviducts / Q000166:cytology / Q000648:ultrastructure
keywords: Female reproductive system; Follicular cell; Matsucoccus matsumurae; Ovary; Telotrophic ovariole; Ultrastructure