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Title: Heavy metal effects on cellular shape changes, cleavage, and larval development of the marine gastropod mollusk, (Ilyanassa obsoleta Say)

Abstract

The spawning areas for many marine invertebrates are in intertidal zones which can be exposed to surface water run-off containing heavy metals. The cellular shape changes and cleavage patterns of Ilyanassa embryos greatly resemble those of bivalve mollusks, such as Mytilus edulis, that occur in the same intertidal areas. Determining the concentrations of heavy metals tolerated by the molluscan embryos inhabiting such clam and mussel beds therefore is of some economic significance. Moreover, such research may providedata on the heavy metal effects on the cytoskeleton. There is increasing evidence that components of the cytoskeleton, directly or indirectly, are targets for toxic agents. Polar lobe formation is a cellular shape change that resembles cytokinesis. It is seen in the fertilized eggs of many marine mollusks. Recent data with inorganic and organic Ca/sup 2 +/ antagonists suggest that both polar lobe formation and cytokinesis utilize Ca/sup 2 +/ released from sequestered, intracellular sites. Both of these cellular constrictions are associated with microfilaments and are preceded by activation steps requiring microtubules. The data presented below suggest that several heavy metals affect the microfilament-dependent steps.

Authors:
Publication Date:
Research Org.:
Mount Desert Island Biological Lab., Salsbury Cove, ME (USA)
OSTI Identifier:
6655579
Resource Type:
Journal Article
Journal Name:
Bull. Environ. Contam. Toxicol.; (United States)
Additional Journal Information:
Journal Volume: 41:1
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; METALS; BIOLOGICAL EFFECTS; MOLLUSCS; ONTOGENESIS; CALCIUM COMPOUNDS; EMBRYOS; LARVAE; MICROTUBULES; MORPHOLOGY; SHAPE; ALKALINE EARTH METAL COMPOUNDS; ANIMALS; AQUATIC ORGANISMS; CELL CONSTITUENTS; ELEMENTS; INVERTEBRATES; 560300* - Chemicals Metabolism & Toxicology

Citation Formats

Conrad, G W. Heavy metal effects on cellular shape changes, cleavage, and larval development of the marine gastropod mollusk, (Ilyanassa obsoleta Say). United States: N. p., 1988. Web. doi:10.1007/BF01689062.
Conrad, G W. Heavy metal effects on cellular shape changes, cleavage, and larval development of the marine gastropod mollusk, (Ilyanassa obsoleta Say). United States. https://doi.org/10.1007/BF01689062
Conrad, G W. 1988. "Heavy metal effects on cellular shape changes, cleavage, and larval development of the marine gastropod mollusk, (Ilyanassa obsoleta Say)". United States. https://doi.org/10.1007/BF01689062.
@article{osti_6655579,
title = {Heavy metal effects on cellular shape changes, cleavage, and larval development of the marine gastropod mollusk, (Ilyanassa obsoleta Say)},
author = {Conrad, G W},
abstractNote = {The spawning areas for many marine invertebrates are in intertidal zones which can be exposed to surface water run-off containing heavy metals. The cellular shape changes and cleavage patterns of Ilyanassa embryos greatly resemble those of bivalve mollusks, such as Mytilus edulis, that occur in the same intertidal areas. Determining the concentrations of heavy metals tolerated by the molluscan embryos inhabiting such clam and mussel beds therefore is of some economic significance. Moreover, such research may providedata on the heavy metal effects on the cytoskeleton. There is increasing evidence that components of the cytoskeleton, directly or indirectly, are targets for toxic agents. Polar lobe formation is a cellular shape change that resembles cytokinesis. It is seen in the fertilized eggs of many marine mollusks. Recent data with inorganic and organic Ca/sup 2 +/ antagonists suggest that both polar lobe formation and cytokinesis utilize Ca/sup 2 +/ released from sequestered, intracellular sites. Both of these cellular constrictions are associated with microfilaments and are preceded by activation steps requiring microtubules. The data presented below suggest that several heavy metals affect the microfilament-dependent steps.},
doi = {10.1007/BF01689062},
url = {https://www.osti.gov/biblio/6655579}, journal = {Bull. Environ. Contam. Toxicol.; (United States)},
number = ,
volume = 41:1,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 1988},
month = {Fri Jul 01 00:00:00 EDT 1988}
}