A Biochemical Approach to the Hemiparasitic Action of the epiphytic Lichen Evernia prunastri on Betula pendula

1993

15 Lit. Ang.

Unselbständiges Werk

4570

200048400

Evernia prunastri (L.) Ach., growing epiphytically on Betula pendula Roth, is able to penetrate into xylem vessels of its phytophore and to dissolve some lichen phenolics in the xylem sap. Evernic acid, the main phenolic of this lichen species, was charcterized by HPLC (retention time 6.61 min) and IR spectrometry. It is acropetally translocated and, as a consequence, the apical zone of branches contains eight times as much evernic acid as the basal zone and the apical bud about 17 times as much as the axillary buds. This lichen phenolic was been found in leaf tissues.