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The quantitative cytochemical effects of three metal ions on a lysosomal hydrolase of a hydroid
Moore, M.N.; Stebbing, A.R.D. (1976). The quantitative cytochemical effects of three metal ions on a lysosomal hydrolase of a hydroid. J. Mar. Biol. Ass. U.K. 81(2): 995-1005
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

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Keywords
    Cadmium; Cell membranes; Copper; Enzymes; Growth; Heavy metals; Mercury; Pollution effects; Toxicity; Campanularia flexuosa (Alder, 1857) [WoRMS]; Marine

Authors  Top 
  • Moore, M.N.
  • Stebbing, A.R.D.

Abstract
    The quantitative effects of Cu2+, Cd2+, and Hg2+ on the cytochemical staining reaction for lysosomal N-acety1-{beta}-D- glucosaminidase have been determined and related to the inhibitory effects of the metals on colonial growth rate in the experimentally cultured hydroid Campanularia flexuosa. Cytochemical threshold concns are comparable to known environmental levels and are about 1 order of magnitude lower than those obtained by measuring colony growth rates. Pretreatment of colonies with Cu2+ gave no indication of tolerance adaptation, although there is evidence of the cumulative toxicity of Cu2+ and the possible sequestration of this metal in endodermal cell lysosomes. There is also an indication that the Cu2+ may exert its toxic effect by decreasing the stability of the lysosomal membranes, thus increasing the level of free glucosaminidase activity.

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