Incorporation of metabolites into glycogen and lipids of the oyster, crassostrea virginica
- Howard Univ., Washington, DC (USA)
Groups of oysters, either fed or unfed, were exposed to U-{sup 14}C labelled D-glucose, L-asp, L-leu, L-ala or acetate for 6 hrs. Except for the glucose trials, the disappearance of radioactivity from the saline of the unfed oysters was greater (83%) than for the fed animals (65%). With glucose, 88% of the radioactivity disappeared in each trial. The specific radioactivity of glycogen isolated from oysters exposed to labelled glucose, asp and ala was 1283, 468 and 8.22 dpm/mg glycogen respectively. Radioactivity was found primarily in the triacylglycerols and phospholipids (PL) in fed oysters and in PL only in unfed oysters. Phosphatidyl choline, phosphatidyl ethanolamine, and a fraction containing phosphatidyl serine and phosphatidyl inositol, had 32%, 25% and 35-40% of the radioactivity respectively. Incorporation of total radioactivity into PL was 70% lower in unfed vs. fed trials, but the distribution of counts among the phospholipids classes was unchanged. Glycogenesis does not appear to be a significant pathway in the oyster. Apparently well-fed oysters are able to store excess dietary calories as lipid. During periods of starvation exogenous small metabolites along with glucose from glycogen are catabolized.
- OSTI ID:
- 5051772
- Report Number(s):
- CONF-870644--
- Journal Information:
- Federation Proceedings, Federation of American Societies for Experimental Biology; (USA), Journal Name: Federation Proceedings, Federation of American Societies for Experimental Biology; (USA) Vol. 46:6; ISSN 0014-9446; ISSN FEPRA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
ACETATES
ALDEHYDES
AMINO ACIDS
ANIMALS
AQUATIC ORGANISMS
BIOLOGICAL PATHWAYS
BIOSYNTHESIS
CARBOHYDRATES
CARBON 14 COMPOUNDS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
ESTERS
FOOD
GLUCOSE
GLYCOGEN
HEXOSES
INVERTEBRATES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LIPIDS
METABOLISM
METABOLITES
MOLLUSCS
MONOSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OYSTERS
PHOSPHOLIPIDS
POLYSACCHARIDES
SACCHARIDES
SYNTHESIS
TRACER TECHNIQUES