Ma Peter W K, Baird Sonya, Ramaswamy Sonny B
Department of Entomology and Plant Pathology, Mississippi State University, P.O. Box 9775, Mississippi State, MS 39762, USA.
Arthropod Struct Dev. 2002 Nov;31(2):131-46. doi: 10.1016/s1467-8039(02)00019-1.
Scanning and transmission electron microscopy were used to study the morphology and formation of the eggshell in the tarnished plant bug, Lygus lineolaris. Eggs are bean-shaped, with an operculum at the anterior end surrounded by a row of 36-40 respiratory horns. Three micropylar openings are on the operculum, and are sealed in oviposited eggs. The chorion consists of the chorion proper and the innermost chorionic layer. An air layer composed of colonnades is present in the chorion. The innermost chorionic layer is homogeneous and electron lucent. The follicle cells secrete electron dense materials that later coalesced into the reticulated vitelline membrane. This is followed by the deposition of the innermost chorionic layer by the follicle cells. After the primordial innermost chorionic layer is formed, follicle cells at the anterior pole of the oocyte secrete the scaffold for the colonnades in the air layer. Later, the primordial scaffold matrix is redistributed and localized at the lateral and posterior end of the oocyte where it becomes secondarily modified. At the end of choriogenesis, follicle cells at the anterior pole secrete the operculum and respiratory horns.
利用扫描电子显微镜和透射电子显微镜研究了牧草盲蝽（Lygus lineolaris）卵壳的形态和形成过程。卵呈豆形，前端有一个卵盖，周围有一排36 - 40个呼吸角。卵盖上有三个微孔，在已产卵中被封闭。卵壳由卵壳本体和最内层的卵壳层组成。卵壳中有由柱廊组成的气层。最内层的卵壳层均匀且电子透明。卵泡细胞分泌电子致密物质，这些物质随后聚合成网状卵黄膜。接着，卵泡细胞沉积最内层的卵壳层。在原始最内层卵壳层形成后，卵母细胞前极的卵泡细胞分泌气层中柱廊的支架。随后，原始支架基质重新分布并定位在卵母细胞的侧面和后端，在那里它会发生二次修饰。在卵壳形成末期，前极的卵泡细胞分泌卵盖和呼吸角。
