Étude du rôle des sucres dans la résistance des pommes de terre au flétrissement bactérien

Abstract

Potato resistance to ring rot does not seem to be related to sugars present in stems and tubers in opposition to the conclusions of Rozhalin. Sugars contained in those organs exceed the amount required by the causal agent, Corynebacterium sepedonicum (Spieck. & Kott.) Skapt. and Burkh., for its growth. Moreover, no correlation could be shown between sugar content and varietal resistance. Sugars added to potato extracts did not influence the growth of C. sepedonicum on these extracts. Moreover, a rise of the storage temperature of potato tubers which caused a rapid decrease in their sugar content did not influence the growth of C. sepedonicum on extracts of the same tubers.