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Morphological characteristics of visual cells in the endemic Korean loach Kichulchoia multifasciata (Pisces; Cobitidae) by microscopy
Affiliations- Department of Biological Science and Institute for Biodiversity Research, College of Natural Sciences, Chonbuk National University, Jeonju, Republic of Korea, Korea, Republic Of
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Abstract
The visual cell of the retina in the Korean loach Kichulchoia multifasciata, a bottom-dwelling freshwater loach in shallow water, contains double cones and large rods. With light microscopy, the cones form a row mosaic pattern in which the partners of double cones are linearly oriented with a large rod. In a double cone or twin cone, the two members are unequal such that one cone may be longer than the other. An anatomical unit is apparent which consists of 5 rod cells and 15 double cone cells per 20 × 20 μm area. We found that the cone cells of outer segments are linked to the inner segment by so-called “calyceal process” using a scanning electron microscopy, unlike rod cells. In the transmission electron microscopy, the outer membrane shows piles of membrane discs surrounded by double membranes.
Abstract
The visual cell of the retina in the Korean loach Kichulchoia multifasciata, a bottom-dwelling freshwater loach in shallow water, contains double cones and large rods. With light microscopy, the cones form a row mosaic pattern in which the partners of double cones are linearly oriented with a large rod. In a double cone or twin cone, the two members are unequal such that one cone may be longer than the other. An anatomical unit is apparent which consists of 5 rod cells and 15 double cone cells per 20 × 20 μm area. We found that the cone cells of outer segments are linked to the inner segment by so-called “calyceal process” using a scanning electron microscopy, unlike rod cells. In the transmission electron microscopy, the outer membrane shows piles of membrane discs surrounded by double membranes.
Keywords
retina, rods, double cones, row mosaic, cobitidae
About this articleTitle
Morphological characteristics of visual cells in the endemic Korean loach Kichulchoia multifasciata (Pisces; Cobitidae) by microscopy
Journal
Issue
Article type
Original article
Pages
186-190
Published online
2016-11-04
Page views
1483
Article views/downloads
1034
DOI
Pubmed
Bibliographic record
Folia Morphol 2017;76(2):186-190.
Keywords
retina
rods
double cones
row mosaic
cobitidae
Authors
J. G. Kim
J. Y. Park
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