イナゴ頭部にみられる内分泌器官の観察
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The heads of nymph and adult females of Oxya iaponica were cut and fixed in Bouin's solution. Serial sections (5-7μ) were made and stained with Hansen's hematoxylin-eosin, Gomori's chrome-alum hematoxylin-phloxin and Heidenhain's azan staining for studying the structure of the endocrine organs in the head. Pars intercerebralis of the brain has the paired groups of neurosecretory cells (about 15μ in dia-meter). These cells contain in their cytoplasms many secretory granules which are stained in deep blue with Gomori's method and in bright red with azan staining. The corpus cardiacum of Oxya japonica consists histologically of the anterior part of nervous tissue, and the posterior part of glanduar tissue (Fig. 1). The secretion from the neurosecretory cells of the brain passes through their axons (Fig. 2, a) and accumulates in their bulb-like extremities in the anterior corpus cardiacum (Fig. 2, b). Secretion may be excreted from these extremities into the blood, after being chemically changed, because, as the time goes on, the chrome-alum hematoxylinophile secretion in the extremities tends to be changed into the phloxinophile one. The posterior corpus cardiacum is a simple endocrine organ and secretes phloxinophile granules at adult stage of insects (Fig. 2, c, d). The secretion of the corpus allatum was unable to be differentiated with the staining methods above described. But judging from the structual chages of the cells and the alterations of their affinities to dyes, it seems probable that the corpus allatum produces secretion not only in the nymphal stages but also in the adult (Fig. 2, e-g). Any secretion from the pars intercere-bralis is not found in the nervi corporis allati and the corpus allatum.
- 社団法人日本動物学会の論文
- 1958-03-15
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関連論文
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