Molecular nature of the cryotolerant lake amphipod Gammarus lacustris |
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Authors: | Karanova M V Gakhova E N |
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Affiliation: | Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290 Russia. |
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Abstract: | Gammarus lacustris were studied in an attempt to identify the mechanism of subzero temperature adaptation, which enables this species to survive in winter under natural conditions. G. lacustris hemolymph contained a high concentration of glucose (42.4 mg/ml of hemolymph). In addition, galactose, mannose, xylose, zellobiose, and unidentifiable disaccharides and oligosaccharides were found, though at much lower concentrations (0.94-3.26 mg/ml). The glycerol concentration in the gammarus hemolymph was about 5-20 times as low as in many other animals surviving at subzero temperatures (16.2 mg/ml). Other sugars and polyhydric alcohols were discovered only in traces amounts in the hemolymph. Antifreeze proteins were not found in the gammarus. |
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