摘要
采用光学显微镜及电子扫描显微镜对遗鸥Larus relictus舌头微观结构进行研究。结果显示:遗鸥的舌头呈细长三角形,由舌尖、舌体、舌根3部分构成。舌尖分叉先端特化为角质的舌突起,舌尖表面有大量脱落的上皮细胞,细胞表面为指纹状;舌体表面光滑,上皮细胞为细长形,表面呈微嵴状;舌根表面有少量的唾液腺开口分布。从功能上分类,遗鸥舌头符合采集食物型舌头结构特征。舌乳突发育不完善,仅锥状乳突在舌体和舌根分界处及上颌表面呈列状分布,乳突末端指向口腔内部。舌黏膜内未见味蕾分布。遗鸥口腔结构的特点与部分鸥科Laridae鸟类区别明显,这可能与遗鸥栖息环境不断恶化、食物种类和数量匮乏有关。
In this study,the ultrastructure of the tongue of Larus relictus was observed using light and scanning electron microscopy. The tongue of L. relictus was triangular in shape,and comprised 3 different parts： the lingual apex,lingual body,and lingual root. The tongue fork had keratinized processes at the lingual apex; the lingual apex had a large number of epithelial cells,and the cell surfaces appear to form a fingerprint. The surface of the lingual body was smooth,and the epithelial cells were elongated with cell surface microridges. The surface of the lingual root had a small number of salivary gland openings. These results indicated that the structure of the tongue of L. relictus was adapted to collecting food. Moreover,the papillae on the lingual mucosa were not perfectly developed and had a cone-shaped appearance,with a row-like distribution on the maxillary surface and at the boundary between the body and root,and the papillae ends point toward the intra-oral cavity. Taste buds in the lingual mucosa were also underdeveloped. Obvious differences existed in the characteristics of the oral structure between L. relictus and other members of the Laridae family,which may be related to habitat deterioration,changes in food type,or food scarcity.
作者
刘利
张乐
孙艳
苗春林
张刚
刘晓光
LIU Li ZHANG Le SUN Yan MIAO Chunlin ZHANG Gang LIU Xiaoguang(Faculty of Biological Science and Technology, Baotou Teachers＇ College, Baotou, Inner Mongolia Autonomous Region 014030, China Nanhai Wetland Scenic Area Management Office of Baotou, Baotou, Inner Mongolia Autonomous Region 014040, China Forestry Bureau of Wushenqi, Ordos, Inner Mongolia Autonomous Region 017300, China)
出处
《四川动物》
北大核心
2017年第2期181-186,共6页
Sichuan Journal of Zoology
基金
国家自然科学基金项目(31560598)
内蒙古自治区自然科学基金项目(2015MS0321)
教育部留学回国人员科研启动基金项目(2014-1685)
内蒙古留学回区人员科研启动基金项目(2015-339)
关键词
遗鸥
栖息环境
舌头
微观结构
Larus relictus
habitat
tongue
ultrastructure
