东方蜜蜂背单眼的结构和胚后发育

Structure and postembryonic development of the dorsal ocellus of the honeybee(Apis cerana)

本研究通过形态解剖和BrdU免疫组织化学方法对东方蜜蜂Apis cerana Fabricius背单眼的胚后发育过程进行了比较研究,结果表明:东方蜜蜂的每一个背单眼都包括角膜晶体、角膜生成细胞、小网膜细胞以及后部的单眼神经。蜜蜂的背单眼起源自头壳上皮;其胚后发育的高峰期集中在蛹发育的前3d;其新细胞主要来源于上皮细胞和圆锥形单眼囊周围细胞的有丝分裂;单眼同脑的联系在P1期前后就已经建立;角膜晶体的形成在P5以后。说明单眼的结构和发育同其功能密切相关。

The structure and postembryonic development of the dorsal ocellus of Apis cerana Fabricius was studied by anatomical observation and BrdU immunohistochemistry. The results show that each ocellus consisted of cornea, corneagenous layer,retinular cells and ocellar nerve. The 3 ocelli of the adult honeybee were of epidermal origin. The development of the ocellus was most active during P1 - P3. New ceils were the products of mitotic divisions occurring in the epidermal ceils and ocellar capsule margins. In the P1 retinula, axons were found making contact with interneurons from both the ocellar nerve and the brain. The cornea appeared after the P5 stage. Ocellar structure and development is closely related to function.