Trees

, Volume 25, Issue 6, pp 1043–1052

Seasonal variations of gas exchange, photosynthetic pigments, and antioxidants in Turkey oak (Quercus cerris L.) and Hungarian oak (Quercus frainetto Ten.) of different age

  • Silviya Velichkova Wolkerstorfer
  • Astrid Wonisch
  • Tatiana Stankova
  • Nikolina Tsvetkova
  • Michael Tausz
Original Paper

DOI: 10.1007/s00468-011-0579-1

Cite this article as:
Wolkerstorfer, S.V., Wonisch, A., Stankova, T. et al. Trees (2011) 25: 1043. doi:10.1007/s00468-011-0579-1

Abstract

Seasonal changes in physiological and biochemical parameters were studied in 35-, 55- and 140-year-old trees of Turkey oak (Quercus cerris L.) and Hungarian oak (Q. frainetto Ten.), growing in natural stands in Eastern Balkan Mountains (Bulgaria). During the seasonal drought period (August), assimilation activity, transpiration rate, stomatal conductance and water potential had a seasonal minimum in all the studied tree ages and species. The foliar concentrations of glutathione, ascorbate, α-tocopherol, as well as photosynthetic pigments in oak leaves were significantly affected by season. With the increasing age of the studied trees, we observed a decrease of the physiological activity and an increase of the antioxidants’ accumulation. Both the species were drought tolerant and anisohydric, where Q. frainetto exhibited higher rates of gas exchange than Q. cerris. Moreover, they differed in the extent of increase in the foliar antioxidants and carotenoids.

Keywords

AntioxidantsPhotosynthetic pigmentsGas exchangeQuercus cerris L.Q. frainetto Ten.

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Silviya Velichkova Wolkerstorfer
    • 1
  • Astrid Wonisch
    • 2
  • Tatiana Stankova
    • 1
  • Nikolina Tsvetkova
    • 3
  • Michael Tausz
    • 4
  1. 1.Forest Research Institut-BASSofiaBulgaria
  2. 2.Institute of Plant SciencesKarl-Franzens-University of GrazGrazAustria
  3. 3.University of ForestrySofiaBulgaria
  4. 4.Department of Forest and Ecosystem ScienceUniversity of MelbourneCreswickAustralia