Beziehungen zwischen der Phosphatasen-Aktivität und dem Gehalt der freien Zucker bei durch die Strichelkrankheit der Kartoffeln infiziertemN. tabacum cv. ‘Samsun’

The content of carbohydrates and activities of phosphatases onN. tabacum cv. ‘Samsun’ inoculated with Y-virus were studied. Dynamic manner of the systematic studies allowed to find new immediate connections. The results of this experiments with the results of our previous investigations gived the explanations of the varying content of carbohydrates in the tissues. The investigated time period of 10 day were divided into 2 parts with breaking point arround fourth day. During the first part at the decreased activity of hexokinases and at the increased activity of phosphatases the accumulation of saccharides in tissues was observed. During the second part slightly increased activity of phosphatases could not supply to the very stimulated kinases the sufficient amount of carbohydrates so that the content of saccharides considerably was being reduced untill the rate of the control plants.