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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.6
- 수록면
- 1 - 7 (7page)
- DOI
- 10.1186/s42649-021-00054-x
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초록· 키워드
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The olfactory organs of two African lungfishes, Protopterus amphibius and P. dolloi , were investigated using a stereo microscope and a compound light microscope and were described anatomically, histologically, and histochemically. Like other lungfishes, these species present the following general features: i) elongated olfactory chamber (OC), ii) anterior nostril at the ventral tip of the upper lip, iii) posterior nostril on the palate of the oral cavity, iv) lamellae with multiple cell types such as olfactory receptor neurons, supporting cells, basal cells, lymphatic cells, and mucous cells (MC), and vi) vomero-like epithelial crypt (VEC) made of glandular epithelium (GE) and crypt sensory epithelium. Some of these features exhibit differences between species: MCs are abundant in both the lamellar and inner walls of the OC in P. amphibius but occur only in lamellae in P. dolloi . On the other hand, some between feature differences are consistent across species: the GE of both P. amphibius and P. dolloi is strongly positive for Alcian blue (pH?2.5)-periodic acid Schiff (deep violet coloration), and positive with hematoxylin and eosin and with Masson’s trichrome (reddish-brown staining), unlike the MCs of the two species which stain dark red with both Alcian blue (pH?2.5)-periodic acid Schiff and Masson’s trichrome but respond faintly to hematoxylin and eosin. The differing abundance of MCs in the two lungfishes might reflect different degrees in aerial exposure of the olfactory organ, while the neutral and acid mucopolysaccharide-containing VEC, as indicated by staining properties of the MCs, is evolutionary evidence that P. amphibius and P. dolloi are the closest living relatives to tetrapods, at least in the order Dipnoi.
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참고문헌 (34)
참고문헌 신청
B. W. Ache / 2005 / Olfaction: Diverse species, conserved principles / Neuron 48:417~430
P. C. Barber / 1974 / An autoradiographic investigation of the projection of the vomeronasal organ to the accessory olfactory bulb in the mouse / Brain Res 81:21~30
G. Bertmar / 1981 / Evolution of vomeronasal organs in vertebrates / Evolution 359:366
H. Brinkmann / 2004 / Nuclear protein-coding genes support lungfish and not the coelacanth as the closest living relatives of land vertebrates / Proc. Natl. Acad. Sci. U. S. A 101:4900~4905
J. H. Derivot / 1984 / Derivot, Functional anatomy of the peripheral olfactory system of the African lungfish Protopterus annectens Owen: Macroscopic, microscopic, and morphometric aspects / Am. J. Anat. 169:177~192
P. C. Barber / 1974 / An autoradiographic investigation of the projection of the vomeronasal organ to the accessory olfactory bulb in the mouse / Brain Res 81:21~30
G. Bertmar / 1981 / Evolution of vomeronasal organs in vertebrates / Evolution 359:366
H. Brinkmann / 2004 / Nuclear protein-coding genes support lungfish and not the coelacanth as the closest living relatives of land vertebrates / Proc. Natl. Acad. Sci. U. S. A 101:4900~4905
J. H. Derivot / 1984 / Derivot, Functional anatomy of the peripheral olfactory system of the African lungfish Protopterus annectens Owen: Macroscopic, microscopic, and morphometric aspects / Am. J. Anat. 169:177~192
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