Metabolic dtrerentiation in muscles was analysed in 50 rabbits of New Zealand White breed (strain INRA 1077) slaughtered at 28, 42, 56, 70 or 84 days. The activity of enzymes representing the g/ycolytic (fructose 1,6- dip aldolase) and the oxidative (NA L?P-isocitrate dehydrogenase) (ICDH) energy metabolism pathways, and two related pllysi~o-c~itt~~nical truits, huem pigment content and ultimate p H, were estimated in semimembranosus proprius + soleus, psoas major and longissimus lumborum ~rrus~*ksA. ldoluse activity wus lowest in scmimbranosus proprius -I- solcus, whirh arc> pure /3 R and the most precociously developed muscles, whereas haem pigment coo tent and ultimate QN wcw highest; however, physi~cv-ckc~~nicNtrIa its changed modemtely during growth. In the psoas major (pure a W) and in the longissimus lumborum (mixed muscle), which develop later, uldolase uc’tivity increased until the 56th und 70th day respectively. The decrease in ICDH activity lasted longer, especialiy in the longissimus lumborum muscle. A significant negative relutionship between aldoluse activity and ultimate pH may explain why the ultimate QH decreased during fu t tening.
POST-WEANING EVOLUTION OF MUSCLE ENERGY-METABOLISM AND RELATED PHYSICOCHEMICAL TRAITS IN THE RABBIT
DALLE ZOTTE, ANTONELLA;
1995
Abstract
Metabolic dtrerentiation in muscles was analysed in 50 rabbits of New Zealand White breed (strain INRA 1077) slaughtered at 28, 42, 56, 70 or 84 days. The activity of enzymes representing the g/ycolytic (fructose 1,6- dip aldolase) and the oxidative (NA L?P-isocitrate dehydrogenase) (ICDH) energy metabolism pathways, and two related pllysi~o-c~itt~~nical truits, huem pigment content and ultimate p H, were estimated in semimembranosus proprius + soleus, psoas major and longissimus lumborum ~rrus~*ksA. ldoluse activity wus lowest in scmimbranosus proprius -I- solcus, whirh arc> pure /3 R and the most precociously developed muscles, whereas haem pigment coo tent and ultimate QN wcw highest; however, physi~cv-ckc~~nicNtrIa its changed modemtely during growth. In the psoas major (pure a W) and in the longissimus lumborum (mixed muscle), which develop later, uldolase uc’tivity increased until the 56th und 70th day respectively. The decrease in ICDH activity lasted longer, especialiy in the longissimus lumborum muscle. A significant negative relutionship between aldoluse activity and ultimate pH may explain why the ultimate QH decreased during fu t tening.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
