Responses of winkles digestive cells and their lysosomal system to environmental salinity changes.
After acclimation to 100, 75 and 50% of Sea Water (SW) external salinities, a significant reduction in MET (Mean Epithelial Thickness) and MDR (Mean Diverticular Radius) indicates a decrease in the digestive cell volume dependant on the lowering of environmental salinity. The interstitial connective tissue seems to be unable to osmoregulate and hence stand severe changes in cell size depending on external salinity. 50% SW acclimated periwinkles show a general pattern of general stress response (decreasing MET and MDR, and increasing ND -Numerical Density of lysosomes- and lysosomal size). A reduction in number and size of digestive lysosomes in winkles acclimated to 75% of Sea Water evidences the functioning of regulatory mechanism of digestive cell volume.
Marigomez
J A
JA
Zitologi eta Histologi Laborategia, Zientzi Fakultatea, Euskal Herriko Unibertsitatea, Bilbo, Spain.
Soto
M
M
Angulo
E
E
D000818:Animals; D004068:Digestive System Physiological Phenomena; D012623:Seawater / Q000032:analysis; D012908:Snails / Q000502:physiology*; D012965:Sodium Chloride / Q000032:analysis; D014882:Water-Electrolyte Balance / Q000502:physiology
D012965:Sodium Chloride