摘要
在扫描电镜下观察大苇莺卵壳主要由壳膜层、乳锥层、柱状层和表层等超微结构构成。不同形态的壳膜纤维交错成网状，呈多层排列，其上有球状、茬状、火柴状芽突和纤维孔；有的纤维伸入壳内，可能参与气孔膜状内壁的形成。乳锥层由多角形锥体、锥突、锥核及锚连纤维构成，气孔开口于锥体间或锥突上，柱状层最厚，为壳功能的主体，含有大量气孔，气孔内有隔膜和球状塞，有助于控制气流和通气状况，保证胚胎发育过程气体交换的需要，开口于表层的气孔外口由钙结晶微球和护膜封闭，可保护胚胎免受细菌的侵袭，防止水分的丧失。
The eggshell ultrastructure of Acrocephalus arundinaceus was observed with scanning electron microscopy It is mainly composed of shell-membrane, mammillary cone, column and outer layers The fibres they interweave into net and arrange in layers are grooveor membrane-or line-form There are some bud-projections, ball, stubble, match-form and stubble-membrane ones There are fibre pores or pits on the fibres Some fibres, go into the shell, may participate in the membrane-wall of the air pore The mammilary cone layer is composed of cone bodies, core and cone projections with some anchoring fibres The body is polygon, on which there are some different projections for the fibres to anchor The inner mouths of the pore are small in or large between the bodies, and some may be the core The column is the thickest one of the layers There are many airs pores in the column for ventilation during the embryo development With the septum and ball pistons, the airflow in the tube may be controlled for warming air and protecting the developmental embryo The outer layer is thin There are some pore mouths on this one The calcite crystal ball close the pore with organic material from a cover layer, and the surface of eggshell is rough with many projections There are protein membranes produced by the oviduct to protect from bacteria and water loss
出处
《河北大学学报（自然科学版）》
CAS
1998年第2期144-147,共4页
Journal of Hebei University(Natural Science Edition)
关键词
大苇莺
卵壳
扫描电镜
超微结构
Acrocephalus arundinaceus Eggshell Scanning electron microscopy Ultrastructure
