Evaluation of chemical composition of jerusalem artichoke tubers from autumn and spring harvest

This bachalor´s thesis deals with the evaluation of the chemical composition of tubers of Jerusalem artichoke for the selected set of 8 clones (Lola, Refla, Gigant, Běloslupký, Úrodný, Völkenroder Spindel, C 63, Karina). Due to the possibility of overwintering tubers in the soil, the tubers were analyzed genotypes of autumn (when dry above-ground plant matter) and then spring harvest (before the germination of tubers) were searched and any changes due to the influence of the winter. The tubers of all genotypes were analyzed for dry matter, protein content, crude protein content and the amount of nitrogen-free substances. Further, an analysis of protein profile by SDS-PAGE method. The highest dry matter content has been determined in tubers clone Gigant (29.1%) and the lowest dry matter content has been determined in tubers clone Lola (19.9%). Due to wintering have been decreased dry matter, crude protein, protein and nitrogen-free substances in the tubers of most the clones