Response reactions of conifers to alkaline dust pollution. Changes in the content of soluble phenolic substances in Picea abies L. needles.
1995
Tohver A.
The content of soluble phenolic substances in Norway spruce needles in sample plots at different distances from a cement plant was examined. It was established that the total amount of phenolic substances and the content of nontannins and tannins increase generally with the shortening of the distance from the cement plant, i.e. with increasing pollution level. This pollution effect, which is detectable as far as 15 km from the emission centre, does not depend monotonously on the distance (pollution load), but has a local minimum near the emission centre in the case of bulk phenolics, tannins, and catechins.
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