Enzyme changes accompanying thermal acclimation in two species of pleurocerid snails

The Journal of Experimental Zoology
C R PughR Lindahl

Abstract

Goniobasis cahawbensis is a stream snail that experiences an annual temperature cycle. G. cochliaris is limited in distribution to springs, and their immediate vicinities, which are characterized by nearly constant annual temperatures. The present study sought to determine whether temperature dependent biochemical differences exist that might account for the differential distribution of these congeneric pleurocerid snails. Eight enzymes were examined following acclimation to 10 degrees, 17 degrees and 24 degrees C. No significant temperature dependent qualitative differences in enzyme phenotypes were demonstrable in either species by starch-gel electrophoresis for malate dehydrogenase, glucose-6-phosphate dehydrogenase, phosphogluconate dehydrogenase, phosphoglucomutase, superoxide dismutase and acetyl and butyryl esterases. Significant quantitative differences were observed in three of these enzymes. G. cahawbensis cytosol malate dehydrogenase activity increased significantly with increasing acclimation temperature, while G. cochliaris malate dehydrogenase activity remained unchanged. The activities of glucose-6-phosphate dehydrogenase did not differ significantly between acclimation temperatures for either species; however, t...Continue Reading

References

Apr 1, 1970·Biochemical Genetics·C R Shaw, R Prasad
Jun 1, 1973·Proceedings of the National Academy of Sciences of the United States of America·R K Selander, D W Kaufman
Dec 8, 1972·Science·P W Hochachka, T Mustafa

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