Abschlussbericht Projekt: „Verminderung der ... - BLE

measurable (P>0.05). Pectin is one component of dry cell wall material and its concentrations
ranged between 0.04 and 0.6 % and remains invisible low in most presented figures.
Also its concentration was very low compared to the calculated residual cell wall compounds,
referred as non-pectin concentration. Neither the pectin concentration nor the nonpectin
concentration reflected tubers blackspot susceptibility (P>0.05). Depending on the
period of investigation the degree of esterification of pectin differed slightly between tubers
differing in their blackspot susceptibility. Approximately 20 % to 60 % of the pectin
chains were esterified. Nevertheless, the degree of esterification of the pectin was not correlated
to the BSI of tubers.
The other components refer to the cytoplasmatic compounds of potato tuber tissue and
were calculated as the differences between the dry matter concentration and the summarized
concentration of the starch and the dry cell wall material. The concentration of the
cytoplasmatic components ranged between 2 % and 7 % depending on tubers specific
gravity. However, a significant increasing concentration of the cytoplasmatic components
with increasing specific gravity was not observed and the calculated concentration of the
cytoplasmatic components were not related to tubers BSI (P>0.05).
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