Phylogenic Aspects of the Amphibian Dual Olfactory System

Journal of Veterinary Medical Science

Kazumi TANIGUCHI³  Kazuyuki TANIGUCHI⁴  Toshihiro OIKAWA²  Shouichiro SAITO¹ 

[1] Laboratory of Veterinary Anatomy, Faculty of Applied Biological Sciences, Gifu University;Department of Pharmacovigilance, Torii Pharmaceutical Co., Ltd.;Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Kitasato University;Laboratory of Veterinary Anatomy, Faculty of Agriculture, Iwate University

关键词: amphibians;    electron microscopy;    lectin histochemistry;    main olfactory system;    vomeronasal system;   

DOI  :  10.1292/jvms.70.1

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(72)Cited-By(12)The phylogenic significance of the subdivision of dual olfactory system is reviewed mainly on the basis of our findings by electron microscopy and lectin histochemistry in the three amphibian species. The dual olfactory system is present in common in these species and consists of the projection from the olfactory epithelium (OE) to the main olfactory bulb (MOB) and that from the vomeronasal epithelium (VNE) to the accessory olfactory bulb (AOB). The phylogenic significance of subdivisions in the dual olfactory system in the amphibian must differently be interpreted. The subdivision of the MOB into its dorsal region (D-MOB) and ventral region (V-MOB) in Xenopus laevis must be attributed to the primitive features in their olfactory receptors. The middle cavity epithelium lining the middle cavity of this frog possesses both ciliated sensory cells and microvillous sensory cells, reminding the OE in fish. The subdivision of the AOB into the rostral (R-AOB) and caudal part (C-AOB) in Bufo japonicus formosus must be regarded as an advanced characteristic. The lack of subdivisions in both MOB and AOB in Cynops pyrrhogaster may reflect their phylogenic primitiveness. Since our lectin histochemistry to detect glycoconjugates expressed in the olfactory pathway reveals the subdivisions in the dual olfactory system in the amphibian, the glycoconjugates may deeply participate in the organization and function of olfactory pathways in phylogeny.

【 授权许可】

Unknown