STUDIES ON SHELL FORMATION. VI. THE EFFECTS OF DINITROPHENOL ON MANTLE RESPIRATION AND SHELL DEPOSITION ,

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Abstract
Dinitrophenol stimulated respiration of the mantle of the oyster Crassostrea virginica in concentrations of 10-3 [image] and 10-4 [image]. Respiration was not significantly different from the endogenous rate at 10-2 [image], 10-5 [image] and 10-6 [image] DNP. Ca deposition, as measured by Ca45, was inhibited in isolated mantle-shell preparations at 10-3 [image] and 10-4 [image] DNP, the same DNP concentrations which stimulated respiration. Inhibition was reversible. Shell regeneration in whole oysters was inhibited by DNP. DNP concentrations which inhibited regeneration were toxic.