Roberts P A, MacPhail L A
Chromosoma. 1985;92(1):55-68. doi: 10.1007/BF00327245.
In Drosophila gibberosa the maximum secretory output of the salivary glands is in the prepupa rather than in the late third-instar larva. Using salivary chromosome maps provided here we have followed puff patterns from late second-instar larvae through the time of histolysis of the salivary glands 28-32 h after pupariation and find low puff activity correlated with low secretory activity throughout much of the third larval instar. Ecdysteroid-sensitive puffs were not observed at the second larval molt but do appear prior to pupariation initiating an intense cycle of gene activity. The second cycle of ecdysteroid-induced gene activity a day later, at the time of pupation, appears somewhat damped, especially for late puffs. Salivary chromosome maps provided here may also be used to identify homologous loci in fat body, Malpighian, and midgut chromosomes.
在驼背果蝇中，唾液腺的最大分泌量出现在预蛹期，而非三龄晚期幼虫期。利用此处提供的唾液腺染色体图谱，我们追踪了从二龄晚期幼虫到化蛹后28 - 32小时唾液腺组织溶解时的胀泡模式，发现在三龄幼虫的大部分时间里，低胀泡活性与低分泌活性相关。在第二次幼虫蜕皮时未观察到蜕皮甾类敏感胀泡，但在化蛹前确实出现，启动了一个强烈的基因活性周期。一天后，在化蛹时，蜕皮甾类诱导的第二个基因活性周期似乎有所减弱，尤其是对于晚期胀泡。此处提供的唾液腺染色体图谱也可用于识别脂肪体、马氏管和中肠染色体中的同源位点。
