甘肃鼢鼠和高原鼢鼠小肠组织学结构的比较  

Histological structure comparison of the small intestine between Gansu zokor(Myospalax cansus) and plateau zokor(Myospalax baileyi)

作　　者：杨传华[1,2] 都玉蓉[3] 林恭华[1] 苏建平[1] 张同作[1] 

机构地区：[1]中国科学院西北高原生物研究所,西宁810001 [2]中国科学院大学,北京100049 [3]青海师范大学生命与地理科学学院,西宁810008

出　　处：《兽类学报》2013年第2期172-177,共6页Acta Theriologica Sinica

基　　金：国家自然科学基金资助项目(30970366);中国科学院"西部之光"人才培养计划项目(0954021211)

摘　　要：甘肃鼢鼠小肠仅为相同体重高原鼢鼠小肠长度的70%,为满足相同的能量需求,甘肃鼢鼠消化系统中某些部位必然会发生相应调整,以代偿其较短的小肠在能量消化吸收方面的不足。本研究应用苏木精-伊红染色技术,对成年甘肃鼢鼠和高原鼢鼠的小肠组织学结构进行了对比研究。结果显示,甘肃鼢鼠十二指肠、空肠和回肠绒毛间距均显著小于高原鼢鼠,而其空肠管径显著大于高原鼢鼠,两种鼢鼠小肠总绒毛面积无明显差异。研究表明,甘肃鼢鼠通过缩小小肠绒毛间距并增大空肠管径来增加小肠吸收表面积,减缓食物通过速率,提高小肠对食物的营养吸收和消化功能,进而代偿其较短的小肠在能量消化和吸收方面的不足。The small intestine length of Gansu zokor （Myospalax cansus ） about 70 percent that of the plateau zokor （M. baileyi）. To meet the same energy requirements, some parts of the digestive system in Gansu zokor must be adjusted to compensate for deficiencies of digestive and absorptive abilities. The histological structure of the small intestine of the two zokor species was compared using the hematoxylin-eosin （HE） staining technique. It was revealed that the villus gaps in the duodenum, jejunum and ileum of Gansu zokors were obviously smaller than those of the plateau zokor, but the inside diameter of its jejunum was significantly bigger than that of the plateau zokor. However, there were no significant difference in the total areas of villus between two species. Our study suggests that the reduced villus gaps of small intestine and the enlarged inside diameter of jejunum serve to increase the absorptive areas of small intestine, slow down the rate of food passing and improve nutritional absorption and digestion. As a result, the deficiencies of digestive and absorptive abilities are offset to some extent.

关 键 词：甘肃鼢鼠 高原鼢鼠 小肠 组织学结构 适应 

分 类 号：Q954[生物学—动物学]