DIURNAL CHANGES IN SYNAPTIC RIBBONS OF ROD CELLS OF THE TURTLE
DIURNAL CHANGES IN SYNAPTIC RIBBONS OF ROD CELLS OF THE TURTLE
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DOI：
10.1016/s0022-5320(84)90104-7
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发表时间：
1984-01-01
期刊：
影响因子：
--
通讯作者：
YAMAMOTO, TY
中科院分区：
文献类型：
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作者：
ABE, H;YAMAMOTO, TY
电镜连续切片显示了鳖视杆细胞突触带的昼夜形态变化。淡水龟（Pseudemys）在0600-1800 h光照的光暗周期下饲养。将眼球后极周围的视网膜固定在2.5%戊二醛和1%四氧化锇中。总共观察到124个视杆细胞和数百个视锥细胞。在0000小时（午夜），丝带位于接近和垂直于突触前膜。它们在薄片上显示出单一的棒状轮廓。从午夜到中午，棒状的带状物生长成由几根相互平行排列的棒状物组成的大型多层带状复合体。然后，从中午到晚上，带状复合体开始分解成不规则的碎片。在1900小时聚集的圆形或棒状带状物为主。
Diurnal morphological changes in synaptic ribbons of the rod cells of the turtle were revealed by EM with serial ultrathin sections. Freshwater turtles (Pseudemys) were maintained under the light-dark cycle with lights on from 0600-1800 h. Retinas around the posterior pole of the eyeball were fixed in 2.5% glutaraldehyde and 1% osmium tetroxide. In total, 124 rod cells and several hundred cone cells were observed. At 0000 h (midnight), ribbons are situated close to and perpendicular to the presynaptic membrane. They show single stick-shaped profiles on thin section. From midnight toward noon, the stick-shaped ribbons grow into large multilayered ribbon complexes composed of several sticks arranged parallel to each other. Then, the ribbon complexes begin to disintegrate into irregular fragments from noon toward night. At 1900 h aggregates of rounded or club-shaped ribbons are predominant.