Abschlussbericht Projekt: „Verminderung der ... - BLE

after harvest. The DP increased significantly during eight months of storage in comparison
to the DP obtained after harvest. The DP of cv. Adretta was the significantly highest compared
to the other cultivars. The cvs. Granola, Renate and Nicola showed the same DP. In
contrast, the FRAP values of cvs. Adretta, Granola and Afra were significant lower compared
to cv. Lolita. The concentrations of antioxidant compounds were not different in cvs.
Renate, Nicola, Marabel and Gala.
BSI test assessed on harvested tubers in 2006 indicated slight differences in blackspot susceptibility
of cultivars compared with tubers harvested in 2005 (Tab. 2). In this year, the
cv. Adretta was very susceptible to blackspot while the cv. Afra showed a medium susceptibility
and cv. Granola was low susceptible. The DP method indicated again the significant
highest values in cv. Adretta. With respect to their blackspot susceptibility a classification
of cultivars after harvest on the basis of the DP tests was not possible because the
obtained data were with exception of cv. Adretta not significantly different.
BSI test after five months of storage revealed that the blackspot susceptibility of tubers
increased significantly, which was in contrast to the results obtained in 2005. However, the
DP and FRAP values were not significantly different in stored cultivars compared with
tubers after harvest.
With respect to eight months stored cultivars their BSI was not significantly different from
tubers after harvest 2006. The DP increased significantly compared to the DP after harvest
and five months of storage. With exception of cv. Adretta the DP of the cultivars were not
significantly different. Long-term storage significantly decreased the FRAP activity of the
presented cultivars.
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