Dendritic reorganization of abdominal motoneurons during metamorphosis of the moth, Manduca sexta
Dendritic reorganization of abdominal motoneurons during metamorphosis of the moth, Manduca sexta
复制标题
烟草天蛾变态过程中腹部运动神经元的树突重组
作者：
R. Levine;J. Truman
在六分鹰蛾的变态过程中，腹壁的肌肉经历了重组。许多幼虫在幼虫生命结束时死亡，成年后被新生成的肌肉取代。我们已经确定了几个支配这些肌肉的运动神经元，并跟随它们经历了蜕变。幼虫运动神经元的形态与它们的目标位置有关。有中间靶点的有双侧树突野，而有外侧靶点的有限制在节段性神经节一侧的树突。一些运动神经元在生命的所有阶段都对同一肌肉进行神经支配，但大多数在进入蛹阶段后就失去了幼虫的目标。虽然后者中的一些也会在这个时候死亡，但大多数存活下来是为了给新的成年靶标神经。这些“重新指定的”运动神经元在变态过程中经历了一段戏剧性的树突生长时期。结果表明，在适当的条件下，这些已鉴定的神经元能够以一种以上的稳定形态存在。
During metamorphosis in the hawkmoth Manduca sexta, muscles of the abdominal body wall undergo a reorganization. Many die at the end of larval life and are replaced in the adult by newly generated muscles. We have identified several of the motoneurons innervating these muscles and followed them through metamorphosis. The morphology of larval motoneurons is correlated with their target location. Those with medial targets have bilateral dendritic fields, whereas those with lateral targets have dendrites restricted to one side of the segmental ganglion. Some motoneurons innervate the same muscle in all stages of life, but the majority lose their larval targets following entry into the pupal stage. Although some of the latter group also die at this time, most survive to innervate a new adult target. These “respecified” motoneurons undergo a period of dramatic dendritic growth during metamorphosis. The results demonstrate that these identified neurons are capable, under the appropriate conditions of existing in more than one stable morphology.
影响因子：
2.7
作者：
L. Schwartz;J. Truman
通讯作者：
L. Schwartz;J. Truman