Abstract
The relationship of the microtubular system to the production of cuticle was evaluated by culturing wing imaginal discs from Plodia interpunctella in medium that contained 20-hydroxyecdysone and either colcemid or vinblastine. Examination of the treated tissue with both a dissection stereomicroscope and an electron microscope showed that the microtubule inhibitors prevented the formation of cuticle. The inhibitors also prevented the synthesis of chitin, but did not reduce protein synthesis. These results support the hypothesis that the secretion of cuticular components by insect cells requires the integrity of the microtubular system.
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