Categorization of the mitochondria-rich cells in the gill epithelium of the freshwater phases in the life cycle of lampreys

Cell and Tissue Research
Helmut BartelsJ Mallatt

Abstract

The distribution and ultrastructure of the mitochondria-rich (MR) cells in the gills of larval (ammocoetes) and adult lampreys (Petromyzon marinus and Geotria australis) have been studied. One type of MR cell, which is found only in ammocoetes, occurs in groups on and between gill lamellae. Freeze-fracture replicas show that the apical membrane of this ammocoete MR cell contains globular particles. The second type of MR cell, which is present in both ammocoetes and adults in freshwater, is located between lamellae and at the base of the filament. This cell usually occurs singly and is typically intercalated between ammocoete MR cells in larval lampreys and between pavement cells and pavement and chloride cells in adult lampreys. It contains rod-shaped particles in either the apical membrane (subtype A) or, far less frequently, the lateral membrane (subtype B) and in membranes of cytoplasmic vesicles and tubules. These features characterize this intercalated MR cell as a member of a group of MR cells that are also found in urinary epithelia of tetrapods and the amphibian epidermis, where they are involved in H+ and HCO3- secretion. Because this type of MR cell disappears when the young adult lamprey enters the sea and reappears ...Continue Reading

Citations

Aug 3, 2004·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·Keith P ChoeSusan L Edwards
Aug 6, 2015·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Maria João LançaPedro Raposo de Almeida
Jul 13, 2002·The Journal of Experimental Zoology·Jonathan M Wilson, Pierre Laurent
Aug 19, 2007·Proceedings. Biological Sciences·S CharbonnierB Riou
Aug 28, 2020·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Julia SungaMichael P Wilkie
Mar 4, 2008·The Journal of Experimental Biology·Patrick Reis-SantosJonathan M Wilson

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