Influence of age on lipase, amylase, and protease activities in pancreatic tissue and intestinal contents of young turkeys.
Day-old male turkeys were fed either a reference diet with 12% sucrose or experimental diets with 12% tallow or 12% animal-vegetable blend (A-V fat) replacing sucrose until 56 days of age. Poults were sampled at 1 day of age and every 2 to 7 days thereafter for determination of enzyme activities of pancreas and contents of the proximal one-fourth of the small intestine. In pancreatic tissue, trypsin, protease, and lipase activities increased with age after a lag period of about 14 days. Amylase activity increased rapidly during the first 14 days. In intestinal contents, trypsin, protease, and amylase increased from Day 1 until Day 21. Development of intestinal lipase activity seemed to depend on dietary fat level. Low activities were observed with low fat diets throughout the study. With high fat diets, a lag period of about 3 wk was followed by a five-fold increase in lipase activity.
Krogdahl
A
A
Department of Animal Science, Iowa State University, Ames 50011.
Sell
J L
JL
D000375:Aging / Q000378:metabolism*; D000681:Amylases / Q000378:metabolism; D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D004032:Diet; D007422:Intestines / Q000201:enzymology*; D008049:Lipase / Q000378:metabolism; D008297:Male; D009929:Organ Size; D010179:Pancreas / Q000201:enzymology*; D010447:Peptide Hydrolases / Q000378:metabolism; D014357:Trypsin / Q000378:metabolism; D014422:Turkeys / Q000378:metabolism*
D008049:Lipase; D000681:Amylases; D010447:Peptide Hydrolases; D014357:Trypsin