Effect of simulated acid rain on the epicuticular wax of Scots pine needles under northerly conditions

M. Turunen, S. Huttunen

Research output: Contribution to journalArticleScientificpeer-review

39 Citations (Scopus)

Abstract

In the extreme N of Finland during 1985-1988, pH 3 treated Pinus sylvestris had received a sulphur load of 7.48 g m-2 and a nitrogen load of 2.62 g m-2, and pH 4 treated pines a S load of 1.23 g m-2 and a N load of 0.43 g m-2 in addition to ambient deposition. No visible symptoms of acid rain injury were observed in the needles, but their growth was significantly reduced. Delayed development of the epistomatal waxes and 4 types of deformed stomatal complex were found by scanning electron microscopy. The rapid erosion of young, undeveloped waxes increased needle wettability (11%) significantly, but the quantity of chloroform-soluble waxes had decreased only slightly. The effects of acid rain on the epicuticular waxes were accentuated during unfavourable growing seasons with reduced effective temperature sums. -from Authors

Original languageEnglish
Pages (from-to)412-419
Number of pages8
JournalCanadian Journal of Botany
Volume69
Issue number2
DOIs
Publication statusPublished - 1991
Externally publishedYes
MoEC publication typeA1 Journal article-refereed

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