龙骨蛏蚌消化管、外套膜和鳃的扫描电镜观察  

Scanning electron microscopy of the digestive tract,mantle and gill of Solenaia carinatus

作　　者：曹艳玲 吴小平[1,2] 欧阳珊[1] 

机构地区：[1]南昌大学生命科学学院,江西南昌330031 [2]南昌大学生命科学研究院流域生态研究所,江西南昌330031

出　　处：《南昌大学学报（理科版）》2017年第5期499-503,共5页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(31260515);国家科技基础条件平台工作重点项目(2005DKA21402)

摘　　要：利用扫描电镜首次对龙骨蛏蚌的消化管、外套膜和鳃进行了观察研究,消化管包括唇瓣、食道、胃、盘旋肠、直肠以及肛门。消化管各段内表面均具有纤毛,纤毛密集细长;盘旋肠和直肠内表面还具有微绒毛;在食道、胃和盘旋肠内表面可见分泌细胞;分泌细胞夹杂在纤毛柱状细胞之间,呈棒状突起。外套膜内表皮呈不规则的板块状结构,具沟和嵴,沟嵴上分布有纤毛和微绒毛,纤毛柱状细胞间夹杂较多的分泌细胞;外表皮表面相对平滑,无明显的沟嵴,表面仅分布有微绒毛,未见大量分泌细胞和球状颗粒。鳃表面布满纤毛,每条鳃丝由前纤毛、前侧纤毛和侧纤毛组成,这些结构在食物的选择与运输方面具有重要的意义。该研究对进一步了解龙骨蛏蚌的摄食机制提供理论依据。The scanning electron microscopy（SEM）was used for the first time to study the digestive tract,mantle and gill of Solenaia carinatus.The digestive tract was composed of labial palp,esophagus,stomach,intestine,rectum and anus.The inner surface of digestive tract was mostly ciliate,and the cilia were dense and slender.In addition,the mantle,intestine and rectum also had microvilli.There were mucous cells in the epithelial of esophagus,stomach and intestine,especially in the stomach,there had many rod-shaped protrusions between ciliated columnar cells.The inner epidermis of mantle presented irregular plate structure,which was divided into groove and ridge,with cilia and microvilli distributed on the groove and ridge,and a large number of mucous cells interspersed between the ciliated columnar cells;the outer epidermis was relatively smooth,without obvious groove and ridge,and the surface was only distributed with microvilli,and there was no large amount of mucous cells and globular granules in the surface of microvilli.Gill was mainly composed of frontal cilia,laterofrontal cirri and lateral cilia,all of these structures played an important role in the selection and transportation of food.This study provided a theoretical basis for further understanding of the feeding mechanism of Solenaiacarinatus.

关 键 词：龙骨蛏蚌 消化管 外套膜 鳃 扫描电镜 

分 类 号：Q959[生物学—动物学]