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Cellular and ultrastructural changes in the endoderm of the temperate sea anemone Anemonia viridis as a result of increased temperature
Authors:Suharsono  R. K. Pipe  B. E. Brown
Affiliation:(1) Research and Development Centre for Oceanography, DAK, JI Pasir Putih 1, Ancol Timur, P.O. Box 580, 11001 Jakarta, Indonesia;(2) Plymouth Marine Laboratory, Citadel Hill, PL1 2PB Plymouth, Devon, England;(3) Department of Marine Sciences and Coastal Management, University of Newcastle upon Tyne, NE1 7RU Newcastle upon Tyne, England
Abstract:Exposure of the temperate sea anemone Anemonia viridis Forskål to increased seawater temperature (from 16 to 26°C) reduced the lysosomal latency of coelenterate tissues. Lysosomes in the mesenterial filaments of anemones were destabilised by increased temperature, with greater destabilisation in heat-shocked symbiotic anemones than in heat-shocked aposymbiotic anemones in the early stages of the experiment. Lysosomal enzyme activity in zooxanthellae from heat-shocked symbiotic anemones was associated with the algal membranes and the cytoplasm of degenerate algal cells. While the relationship between host coelenterate and symbiotic alga may confer many benefits under ldquonormalrdquo conditions, comparison of the responses of symbiotic and aposymbiotic anemones to heat shock suggests that there may be disadvantages for symbiotic anemones under stress.
Keywords:
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