The Relationship Between Chloride Cells and Salinity Adaptation in the Euryhaline Teleost, Lebistes reticulatus

2009 ◽  
Vol 8 (5) ◽  
pp. 888-892 ◽  
Author(s):  
Belda Erkmen . ◽  
Durdane Kolankaya .
Keyword(s):  
Chloride Cells ◽  
Salinity Adaptation ◽  
Euryhaline Teleost ◽  
The Relationship ◽  
Lebistes Reticulatus

Freeze fracture of the gill epithelium of euryhaline teleost fish

1980 ◽  
Vol 238 (3) ◽  
pp. R207-R212 ◽  
Author(s):  
C. Sardet
Keyword(s):  
Plasma Membrane ◽  
Tight Junctions ◽  
Teleost Fish ◽  
Freeze Fracture ◽  
Chloride Cells ◽  
Gill Epithelium ◽  
Functional Importance ◽  
Seawater Adaptation ◽  
Basolateral Plasma Membrane ◽  
Euryhaline Teleost

We briefly discuss the information one can obtain using freeze fracture. We used this technique to precisely identify the types of junctions that link the cells of the gill epithelium of euryhaline teleosts. In particular we demonstrate that seawater adaptation is characterized by the appearance of new apical tight junctions between chloride cells. Another particularity of these cells, the extensive network of tubules, extension of the basolateral plasma membrane, is shown to be made of repetitive units. We discuss the functional importance of the observations with respect to the adaptation of fish to different salinities.

A Study of the so-called ‘Chloride-Secretory’ Cells of the Gills of Teleosts

1961 ◽  
Vol s3-102 (60) ◽  
pp. 507-518
Author(s):  
T. VICKERS
Keyword(s):  
Sodium Chloride ◽  
Goblet Cells ◽  
Chloride Cells ◽  
Secretory Cells ◽  
Extreme Conditions ◽  
Mucous Cells ◽  
Salt Solutions ◽  
Freshwater Teleost ◽  
Salt Load ◽  
Lebistes Reticulatus

The histology of the gills of a normally freshwater teleost, the guppy (Lebistes reticulatus), has been studied after the fish had been subjected to various concentrations of sodium chloride. Cells similar to those identified by previous workers as ‘chloridesecretory cells’ develop in response to adaptation to hypertonic salt solutions, and the number and character of the cells can be related to the salt load and to the degree of adaptation of the fish to it. The cytology of these cells has been shown to be consistent with their supposed function. In fish which are not fully adapted to the salt load, these cells show signs of the formation of mucous materials, and under extreme conditions they may undergo transformation into goblet cells. This may provide an explanation of the failure of Bevelander (1935, 1936) to find any specialized cells other than mucous cells on the teleost gill.

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

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