摘要
电镜观察和统计结果表明:1.不冬眠组蒙古黄鼠松果腺细胞相对冬眠组的来说具有较大截面积的细胞和核,较长且较窄的高尔基器,每个高尔基器所具有的囊数较多,但空泡的截面积小,脂肪粒少,透明小泡少;2.冬眠周期长短不同的黄鼠的松果腺细胞和核截面积大小无差异、高尔基器的大小也无差异,有差异的超微结构特征只有空泡的截面积大小,且它们三组之间的差异显著。冬眠周期越长,空泡的截面积越大。这提示蒙古黄鼠的冬眠周期长短可能与松果腺细胞的总代谢活力无关;空泡可能在维持冬眠周期长短中起重要作用。
Adult Mongolian ground squirrels (Citellus dauricus) were kept at 5℃ in winter and divided into four experimental groups according to the bout length. The first group was not hibernating until decapitation. The bout length of the second group was between 4-10 days, the third group 11--17 days and the fourth group longer than 20 days. All pineals were sampled at the end of January. Morphometric analytical procedures were used to study the ultrastructure of the distal part of the pineal gland. The statistical results demonstrated that 1) the euthermic animals have larger cross areas of pinealocyte, longer and narrower Golgi apparatus and more number of saccules of each Golgi apparatus (P<0.01). But they also have smaller volume density of vaculoes, less lipid droplets and associated vesicles around Golgi apparatus (P<0.01). 2) the hibernating animals with variety of bout length had no significant difference in the number of mitochondria, lipid droplets, lysosomes, the size of Golgi apparatus and the cross areas of nucleus and cytoplasm (P>0.05). However, the number and the cross areas of vacuoles were significantly increased with the bout length (P<0.01). This might suggest that the bout length was not related to the metablic activity of pinealocytes in Citellus dauricus and vacuoles might play some important roles in maintenance of individual bout of hibernation in this species.
出处
《实验生物学报》
CSCD
1990年第3期307-317,共11页
Acta Biologiae Experimentalis Sinica
基金
国家自然科学基金(NO.3870253)
关键词
蒙古黄鼠
松果腺细胞
冬眠
形态学
Citellus dauricus. Pinealocytes. Hibernation. Ultrastructure.
