Cantino D, Marchiafava P L, Strettoi E, Strobbia E
J Submicrosc Cytol. 1986 Jul;18(3):559-66.
Double cones of tench and goldfish retina are characterized by extensive subsurface cisternae underlying the plasma membranes at the appositional area between the principal and accessory cone. Such a membrane system is absent in double cones of turtle and salamander retina. Measurements on both transverse and longitudinal sections gave a total appositional area of about 75 square microns, the subsurface cisterna in each element of the double cone being around 8-10% smaller due to multiple fenestrations at the level of the paraboloid. No gap junctions joining the inner segments of tench and goldfish double cones were detected, while gap junctions could be observed at the level of the ellipsoid and paraboloid of turtle double cones. The possible role of the subsurface cisternae in functional interactions between double cone elements is discussed.
丁鲷和金鱼视网膜的双锥细胞在主锥和副锥之间的并列区域，其质膜下方具有广泛的表面下池。龟和蝾螈视网膜的双锥细胞中不存在这样的膜系统。对横切面和纵切面的测量得出总并列面积约为75平方微米，双锥细胞每个元件中的表面下池由于抛物面水平处的多个小孔而小约8-10%。未检测到连接丁鲷和金鱼双锥细胞内段的间隙连接，而在龟双锥细胞的椭球体和抛物面水平可观察到间隙连接。讨论了表面下池在双锥细胞元件之间功能相互作用中的可能作用。
