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Biol Bull 112: 92-96. (February 1957)
© 1957 Marine Biological Laboratory
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STUDIES ON SHELL FORMATION. VI. THE EFFECTS OF DINITROPHENOL ON MANTLE RESPIRATION AND SHELL DEPOSITION

SAMUEL P. MARONEY JR. 1, ALBERT A. BARBER 1, and KARL M. WILBUR 1

1 Department of Zoology, Duke University, Durham, N. C. and Duke University Marine Laboratory, Beaufort, N. C.

1. Dinitrophenol stimulated oyster mantle respiration at 10-3 M and 10-4 M. Respiration was not significantly different from the endogenous rate at 10-2 M, 10-5 M and 10-6 M DNP.

2. Calcium deposition, as measured by Ca45, was inhibited in isolated mantle-shell preparations at 10-3 M and 10-4 M DNP, the same DNP concentrations which stimulated respiration. Inhibition was found to be reversible.

3. Shell regeneration in whole oysters was inhibited by DNP. DNP concentrations which inhibited regeneration were toxic.






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