Ultrastructure of photoreceptors in the eye ofHermissenda labelled with intracellular injections of horseradish peroxidase
Ultrastructure of photoreceptors in the eye ofHermissenda labelled with intracellular injections of horseradish peroxidase
复制标题
细胞内注射辣根过氧化物酶标记的赫米森达眼光感受器超微结构
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
D. Alkon
中科院分区：
文献类型：
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作者：
Terry J. Crow;E. Heldman;Vachik Hacopian;Robert A. Enos;D. Alkon
SummaryThe terminal processes of single and of pairs of identified photoreceptors in the eyes of the nudibranch molluscHermissenda crassicornis were studied by light and transmission electron microscopy after their somata were labelled by intracellular iontophoresis of horseradish peroxidase (HRP). The HRP spread from the somata into the axons and fine terminal processes within the neuropil of the cerebropleural ganglia. The photoreceptors ended in extensive secondary branches in the neuropil where previous electrophysiological studies had indicated the probable site of synaptic interactions between photoreceptors. Clear round vesicles (54–126 nm diameter) within labelled processes were similar to the vesicles found in the somata and axon hillocks. The terminal processes of pairs of type B photoreceptors contained different intensities of the HRP label. Uniform intensities of the HRP label were found in the terminal processes of single type B photoreceptors. These differences in intensity suggested that the terminal processes were from different type B photoreceptors. This finding suggests that the connections between type B photoreceptors are probably monosynaptic.
