Heavy metal effects on cellular shape changes, cleavage, and larval development of the marine gastropod mollusk, (Ilyanassa obsoleta Say)
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.
- Research Organization:
- Mount Desert Island Biological Lab., Salsbury Cove, ME (USA)
- OSTI ID:
- 6655579
- Journal Information:
- Bull. Environ. Contam. Toxicol.; (United States), Vol. 41:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Metabolism and Toxicity of Trace Metals in the Marine Mussel, Mytilus edulis
Effects of current velocity on byssal thread production in the zebra mussel (Dreissena polymorpha)
Related Subjects
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