昆虫角质层的孔道及相关结构。

M LOCKE
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引用次数: 279

摘要

研究了一种酯酶在廊虫幼虫、黄粉虫幼虫和蛹以及蜜蜂的分泌蜡质角质层中的精细结构和分布,并与足足虫毛虫角质层中的酯酶进行了比较。在廊虫和黄粉虫中,孔管是从上皮到表皮外皮穿过层状内膜的空隙。它们含有来自细胞的细丝,这可能与它们的形成有关。孔管的形状可能是由构成内膜片的纤维的方向决定的,而不是规则的螺旋形。孔管还包含许多另一种类型的细丝,它们穿过表皮,被认为是表面蜡的起源。它们在蜜蜂分泌蜡质角质层的孔道中特别丰富,并以被质膜包围的长口袋延伸到细胞内。酯酶可能与蜡合成的最后阶段有关,因为它的分布与脂质丝的分布相似。
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Pore canals and related structures in insect cuticle.

The fine structure and the distribution of an esterase have been studied in the cuticle of Galleria larvae, Tenebrio larvae and pupae, and in the wax-secreting cuticle of the honey bee, and compared with those in the cuticle of the caterpillar of Calpodes. In Galleria and Tenebrio the pore canals are spaces passing through the lamellate endocuticle from the epithelium to the epicuticle. They contain a filament from the cells which may be concerned in their formation. The shape of the pore canal is probably determined by the orientation of the fibres making up the lamellae in the endocuticle and is not a regular helix. The pore canals also contain numerous filaments of another sort which pass on through the epicuticle and are believed to be the origin of the surface wax. They are particularly abundant in the pore canals of the honey bee wax-secreting cuticle and extend into the cell in long pockets surrounded by an envelope of the plasma membrane. The esterase is probably concerned with the final stage of wax synthesis, for its distribution is similar to that of the lipid filaments.

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