ROD OUTER SEGMENTS ELONGATE IN CONSTANT LIGHT - DARKNESS IS REQUIRED FOR NORMAL SHEDDING
ROD OUTER SEGMENTS ELONGATE IN CONSTANT LIGHT - DARKNESS IS REQUIRED FOR NORMAL SHEDDING
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DOI：
10.1016/0042-6989(78)90027-5
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发表时间：
1978-01-01
期刊：
影响因子：
1.8
通讯作者：
RAYBORN, ME
中科院分区：
文献类型：
--
作者：
CURRIE, JR;HOLLYFIELD, JG;RAYBORN, ME
脱落的大杆外段片段大大减少时，蛙pipiens保持在中等水平的连续光照。这种抑制脱落导致外节长度增加，因为即使脱落停止，椎间盘增加仍在继续。一些脱落会发生时，恒定的光青蛙受到短暂的黑暗，这表明黑暗单独可能刺激脱落。大量脱落，导致减少到正常的外节长度，发生时，恒定光照的动物在黑暗中维持短至30分钟，然后返回到恒定的光。这种脱落反应甚至在双侧视神经被切断和松果体切除术或垂体切除术后也会发生。
Shedding of large rod outer segment fragments was greatly reduced when Rana pipiens were maintained under moderate levels of continuous light. This inhibition of shedding resulted in an increase in outer segment length, since disc addition continued even as shedding stops. Some shedding will occur when constant-light frogs were subjected to a brief period of darkness, suggesting that darkness alone may stimulate shedding. Massive shedding, resulting in a reduction to normal outer segment length, occurred when constant-light animals were maintained for as little as 30 min in darkness and were then returned to constant light. This shedding response will occur even after both optic nerves are severed and after pinealectomy or hypophysectomy.