UV-absorbing compounds and waxes of Scots pine needles during a third growing season of supplemental UV-B

摘要

Methanol-extractable UV-absorbing compounds, wax tube distribution and the chloroform-soluble waxes of the needles of mature Scots pines were studied in a UV-B field experiment in Oulu (65 N). throughout the experiment, UV-B lamp banks were placed over the same selected branch and each year needle samples were taken from the same branch.