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KMID : 0616619970030030241
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Journal of Soonchunhyang Medical College
1997 Volume.3 No. 3 p.241 ~ p.257
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An Ultrastructural Study on the Nerve cell Bodies of the Brain from Butterfly, Pieris raple L., in Morphogenesis
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Abstract
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An ultrastructural study on the nerve cell bodies of the brain from the butterfly, Pieris apae L., was performed in four stages of 5-day-old adult, adult immediately after last moult, pup/adult moult and 6-day-old pupa.
1. Nerve cell bodies were divided inte two main groups; the one with the secretory granules in the cytoplasm through the brains of four stages, and the other one without the secretory granules. The former was categolized into type Ⅳ cell body. The latter was subdivided into three types by the differences of their sizes and nucleoplasmic index; type Ⅰ , type Ⅱ and type Ⅲ cell bodies.
2. The distributions of four kinds of cell bodies in the brains were similar through four stages. The protocerebrums included p-type Ⅰ, Ⅱ, Ⅲ and Ⅳ cell bodies in the pars intercerebralis. And the calyx contained p-type Ⅰ, Ⅱ and Ⅲ cell bodies. The deutocerebrum had p-type Ⅰ, Ⅱ and Ⅲ cell bodies. And tritocerebrum also included t-type Ⅰ, Ⅱ and Ⅲ cell bodies.
3. The cell bodies contained considerable arrays of smooth endoplasmic reticulum. The rough endoplasmic reticulum were abundantly observed in the adult immediately after last moult. A number of Golgi complexes were developed in all of four type cell bodies of four stages, especially in type 1 , II and IV cell bodies. All nerve cell bodies also included mitochondria, lysosomes and ribosomes. The. secretory granules observed in p-type 1V ,cell bodies were released from the cisternae of Golgi complex.
4. The cell body of round shape was abundantly observed in the brain of 6-day-old pupa, but the irregular cell body was abuntantly included in the brain of 5-day-old adult.
5. The secretory granules surrounded by a single unit membrane in p-type Ⅳ cell bodies were circular in outline and exhibited a wide range of diameter from 1000 to 4000A. They possessed electron dense materials within themselves.
6. The formations of secretory granules in type Ⅳ cell bodies in four stages are considered to be studied more.
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