The fine structure of the ventral intersegmental abdominal muscles of the insect Rhodnius prolixus during the molting cycle. II. Muscle changes in preparation for molting.
The fine structure of the ventral intersegmental abdominal muscles of the insect Rhodnius prolixus during the molting cycle. II. Muscle changes in preparation for molting.
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在摩尔特循环中，昆虫rohodnius prolixus的腹侧分段腹部肌肉的细胞结构。 ii。肌肉的摩擦变化。
DOI：
10.1083/jcb.37.2.462
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发表时间：
1968-05
影响因子：
7.8
通讯作者：
Pepe, F A
中科院分区：
文献类型：
--
作者：
Toselli, P A;Pepe, F A
Rhodnius prolixus 腹侧节间腹肌的发育是由进食触发的。早期肌肉（进食后 1 天）基本上含有非横纹原纤维。然而，在横截面中，可以识别指示早期I带、Z线和A带的区域。直到喂食后 4 到 5 天之间，交错的粗细肌丝才会组装成精确的网格。随着发育的继续，原纤维的数量增加，对应于Z线的区域密度增加，并且原纤维包含更多可识别的条纹。随着肌丝在外周的添加，新形成的原纤维变宽。在整个发育的所有阶段，细肌丝与粗肌丝的比例始终为 6:1。 Rhodnius腹肌中原纤维的形成与鸡胚骨骼肌中的不同。主要区别在于，Rhodnius 的所有阶段都存在 (1) 细肌丝与粗肌丝的恒定比例，以及 (2) 可检测到的 Z 线材料。 Rhodnius 的其他发现表明（1）单核细胞与多核肌肉细胞发生融合，（2）肌腱细胞中微管的发育与相关肌肉细胞中肌原纤维的发育同时发生，（3）直径为 55A 的细丝聚集成微管。
The development of the ventral intersegmental abdominal muscles of Rhodnius prolixus is triggered by feeding. The early muscle (1 day after feeding) contains essentially nonstriated fibrils. However, in cross-sections, areas indicating early I bands, Z lines, and A bands can be recognized. Interdigitating thick and thin myofilaments do not assemble into a precise lattice until sometime between 4 and 5 days after feeding. As development continues, the number of fibrils increases, the region corresponding to the Z line increases in density, and the fibrils contain more recognizable striations. The newly formed fibrils broaden as myofilaments are added peripherally. At all stages throughout development, the ratio of thin to thick myofilaments is always 6:1. The formation of fibrils in the abdominal muscles of Rhodnius is different from that in chick embryo skeletal muscle. The major differences are that at all stages in Rhodnius there are (1) a constant ratio of thin to thick myofilaments, and (2) detectable Z-line material. Other findings in Rhodnius suggest (1) that fusion of mononucleated cells with the multinucleated muscle cell occurs, (2) that microtubules develop in the tendon cell concomitantly with development of myofibrils in the associated muscle cell, and (3) that filaments 55A in diameter aggregate into microtubules.