On the role of the peripheral layer in the development of necrosis on Potato tubers infected with P. infestans

Sokolova, V.E.; Vasyukova, N.I.

Doklady Akademii Nauk SSSR 160(3): 724-727


ISSN/ISBN: 0002-3264
Accession: 014591211

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The accumulation of phenolic compounds in the necrotic tissues of the Moskovskii var., inoculated with P. infestans, with and without the peripheral layer was estimated by paper chromatography and spectrophotometrically. Due to the O factor these compounds were found in higher proportions in the necrotic tissue of the peripheral layer. The conc. of chlorogenic acid was 40%., and that of scopoline 20% lower in the necrotic extracts from the non-peripheral layer. The size of necrotic spots was in direct relation to chlorogenic acid conc. There was no external difference between necrosis on tubers with the peripheral layer removed and that in the control.