Amount of flavonols and stilbenes during needle development of Picea abies; variations between provenances
1998
Slimestad, R.
The amounts of flavonols and stilbenes in needles of Picea abies [L.] Karst. were measured during the first year of needle development by means of high-performance liquid chromatography (HPLC-DAD). A rapid decrease in the content of eleven flavonols was detected during the early phases of needle outgrowth. Two flavonol derivatives having an unusual substitution pattern, did not undergo the same turnover as the remaining flavonols. This indicates that the two flavonols follow another metabolic pathway. Increasing amounts of six stilbenes were accumulated during the same period. The samples were from different trees belonging to three different provenances. Principal component analysis of the chromatographic data revealed that the content of flavonols increased with a decrease in latitude of the provenance. Moreover, the southern provenance produced more highly oxygenated flavonols than the other provenances. In contrast, the highest content of stilbenes was found in the clones originating from the northern provenance.
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