Changes during storage in the caffeinic and chlorogenic acid content in the peripheral layer of Potato tubers in varieties differing in their resistance to P. infestans

Sokolova, V.E.; Zvyagintseva, Y.. V.; Kazantseva, G.N.; Metlitskii, L.V.

Doklady Akademii Nauk SSSR 177(3): 724-727


ISSN/ISBN: 0002-3264
Accession: 014373928

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The changes in the value of the ratio between the content of caffeic and chlorgenic acids in the peripheral layer of potato tubers for varieties differing in resistance to P. infestans were traced. A high content of chlorogenic acid indicated a low intensity of its enzymatic splitting which led to an accumulation of this compound in the tuber tissues of susceptible varieties, promoting the development of the pathogen. A comparatively low content of chlorogenic acid in the peripheral layer of the tubers of the least susceptible varieties was a consequence of a greater intensity of the splitting of this depside. As a result, the content of the substance stimulating the growth of the pathogen appreciably decreased, and simultaneously with the content of caffeic acid, a compound inhibiting the growth of the fungus increased. This probably favorably affected the resistance of these varieties.