Variability of some phenolic acids in phloem of 1-year-old shoots of Scots pine trees growing with Heterobasidion annosum (Fr.) Bref.
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HPLC chromatographic analyses of some phenolic acids in phloem of 1-year-old shoots sampled from 32 trees of eight Polish provenances of Scots pine (Pinus sylvestris L.) growing under conditions of annosum root [Heterobasidion annosum (Fr.) Bref.] are discussed. Considerable quantitative and qualitative differentiation was found among individual trees. The variability of trees was estimated with regard to the level of phenolic acids and correlations were established in order to assess the character of their joint occurrence in shoot phloem. In view of pathogen presence, the content of phenolic acids varies between individuals depending upon the genotype of pine, the stage of development of the disease and upon the effect of tree growth conditions.
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