Effect of 3 years' free-air exposure to elevated ozone on mature Norway spruce (Picea abies (L.) Karst.) needle epicuticular wax physicochemical characteristics

Kevin E. Percy, Sirkku Manninen, Karl Heinz Häberle, C. Heerdt, H. Werner, Gary W. Henderson, Rainer Matyssek

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We examined the effect of ozone (O3) on Norway spruce (Picea abies) needle epicuticular wax over three seasons at the Kranzberg Ozone Fumigation Experiment. Exposure to 2× ambient O3 ranged from 64.5 to 74.2 μl O3 l-1 h AOT40, and 117.1 to 123.2 nl O3 l-1 4th highest daily maximum 8-h average O3 concentration. The proportion of current-year needle surface covered by wax tubes, tube aggregates, and plates decreased (P = 0.011) under 2× O3. Epistomatal chambers had increased deposits of amorphous wax. Proportion of secondary alcohols varied due to year (P = 0.004) and O3 treatment (P = 0.029). Secondary alcohols were reduced by 9.1% under 2× O3. Exposure to 2× O3 increased (P = 0.037) proportions of fatty acids by 29%. Opposing trends in secondary alcohols and fatty acids indicate a direct action of O3 on wax biosynthesis. These results demonstrate O3-induced changes in biologically important needle surface characteristics of 50-year-old field-grown trees.

Original languageEnglish
Pages (from-to)1657-1665
Number of pages9
JournalEnvironmental Pollution
Volume157
Issue number5
DOIs
StatePublished - May 2009

Keywords

  • Epicuticular wax
  • Free-air exposure
  • Mature trees
  • Norway spruce (Picea abies)
  • Ozone

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