Potato genetically modified by 14-3-3 protein repression in growing rat diets. Pt. 1. Chemical composition and digestibility of nutrients
2008
Kosieradzka, I | Sawosz, E.,Warsaw University of Life Sciences (Poland). Dept. of Animal Nutrition and Feed Science | Szopa, J.,Wroclaw University, Wroclaw (Poland). Inst. of Biochemistry and Molecular Biology | Vasko, V.,Warsaw University of Life Sciences (Poland). Dept. of Animal Nutrition and Feed Science
A study was undertaken to assess the nutritional value of tubers of transgenic lines of potato cv. Desiree with repression of a and c isoforms of 14-3-3 proteins obtained by means of antisense transformations. Isoforms of 14-3-3 protein are responsible for metabolism of carbohydrates, amino acids and calcium. Repression of that protein, i.e. reduction of its synthesis in a potato plant, results in: a decrease in total protein content of tuber with a slight but favourable change in the amino acid profile, enhanced synthesis of starch, small differentiation in contents of minerals - diminished concentrations of Fe, P, and Ca. The 30 percent addition of dried transgenic potato tubers with repression of isoform a, c as well as a and c of 14-3-3 protein was found not to affect values of digestibility coefficients of nutrients. Repression of 14-3-3 protein was demonstrated to affect diversification of the chemical composition of tuber and contents of nutrients only to a small extent, without diminishing the nutritional value of potato tubers
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