Browsing by Author "Grammenidis, E"

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Effects of Maternal Dietary Supplementation With Three Sources of Carotenoids on the Retinyl Esters of Egg Yolk and Developing Quail Liver
(Elsevier Science inc, 2005) Karadas, F; Surai, PF; Sparks, NHC; Grammenidis, E
The effects of supplementation of the maternal diet of quail with three natural sources of carotenoids (alfalfa nutrient concentrate (PX agro (TM)), tomato powder and marigold extract) on the accumulation of retinol and retinyl esters in egg yolk and in the liver of the new hatchling and maternal were investigated. The present study showed that the vitamin A in quail egg yolk was present in 4 different forms, namely retinol (R 52-62%), retinyl linoleate (RL 9-11%), retinyl stearate (RS 4%), retinyl oleate (RO 11-15%) and retinyl palmitate (RP 13-22%). The retinyl ester profile of the liver of newly hatched quail (R 2-4%, RL 8-12%, RS 19-21%, RO 12-15%, RP 50-55%) differs from that of egg yolk but was similar to that of the liver of adult quail (R 1%, RL 5-6%, RS 21-28%, RO 9-12%, RP 54-63%). It has been shown that RO and RP concentrations in egg yolk and the liver of day old quail chick significantly increased as a result of carotenoid supplementation of the maternal diet. (c) 2005 Elsevier Inc. All rights reserved.
Supplementation of the Maternal Diet With Tomato Powder and Marigold Extract: Effects on the Antioxidant System of the Developing Quail
(Taylor & Francis Ltd, 2006) Karadas, F; Surai, P; Grammenidis, E; Sparks, NHC; Acamovic, T
1. The effects of natural dietary carotenoid supplementation of the maternal diet ( tomato powder and marigold extract) on transfer to the egg yolk and on the development of the antioxidant system of the young quail liver in early postnatal life were investigated. 2. Sixty Japanese quail (Coturnix coturnix japonica) were allocated to four treatment groups, each with three replicates consisting of four females and one male each. The quail were fed on one of four different diets for 23d, each of them based on a low carotenoid, wheat/barley-based control diet. Tomato powder and marigold extract were added at rates of 20 and 2g/kg to treatments 2 and 3, respectively. Marigold extract and tomato powder were also used in combination in treatment 4 at 2 g marigold+20 g tomato powder/kg of diet. 3. At 20 weeks of age, 60 eggs from each treatment were collected and placed in an incubator. After hatching, d-old quail from each group were reared (under standard commercial conditions) up to 14d of age. They were fed on a low-carotenoid commercial diet. After hatch, at 1, 7 and 14d, the livers of five young quail from each treatment were assessed for total carotenoid concentration and carotenoid profile. 4. Results indicated that lycopene is transferred from the feed to the egg yolk and further to the liver of the developing embryo. Elevated carotenoid concentration in the egg yolk and correspondingly in the liver of newly hatched quail remains significant during first week posthatch. 5. Lutein and lycopene did not affect vitamin E concentration in the egg yolk or liver of the newly hatched quail. A combination of increased concentrations of lycopene and lutein in the egg yolk results in elevated concentrations of coenzyme Q in the liver of the newly hatched quail.