Effects of supplement UV-B radiation on photosynthesis performance and UV-B absorbing compounds in leaves of two oak species

I. Mészáros, Réka Láposi, Szilvia Veres, E. Sárvári, Angéla Gáspár, Edit Bai, Viktor Oláh, G. Lakatos

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The aim of this work was to compare the photosynthetic responses of two tree species (Quercus petraea, Quercus robur) and to determine the leaf level protection under enhanced UV-B radiation in outdoor experiments. Three year old seedlings of both species were exposed to enhanced UV-B radiation (supplementing the ambient level with 40%) from bud break until leaf senescence. Under enhanced UV-B, increases of specific leaf mass (SLM) and reduction of leaf chlorophyll content per dry weight basis were observed but the total carotenoid content remained high. Both oak species responded with an increase of VAZ pool to enhanced UV-B. High values of potential photochemical efficiency of PS2 (Fv/Fm) were observed in both species during the growing season. On clear sunny days loss of Fv/Fm was observed from morning till midday which was larger under enhanced UV-B for both species suggesting that UV-B exposure enhanced the sensitivity of seedlings to photoinhibition. The enhanced UV-B induced increases in the amount of UV-B absorbing compounds in leaves of Q. robur but it slightly affected these traits of leaves of Q. petraea.

Original languageEnglish
Pages (from-to)165-166
Number of pages2
JournalActa Biologica Szegediensis
Volume49
Issue number1-2
Publication statusPublished - 2005

Fingerprint

Quercus
Photosynthesis
Seedlings
photosynthesis
Radiation
Carotenoids
Chlorophyll
leaves
Quercus petraea
Quercus robur
Weights and Measures
seedlings
budbreak
Experiments
photoinhibition
carotenoids
growing season
chlorophyll

Keywords

  • Flavonoids
  • Photochemical efficiency of PS2
  • Quercus
  • UV-B radiation
  • Xanthophyll cycle

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Cell Biology
  • Neuroscience(all)
  • Applied Microbiology and Biotechnology

Cite this

Effects of supplement UV-B radiation on photosynthesis performance and UV-B absorbing compounds in leaves of two oak species. / Mészáros, I.; Láposi, Réka; Veres, Szilvia; Sárvári, E.; Gáspár, Angéla; Bai, Edit; Oláh, Viktor; Lakatos, G.

In: Acta Biologica Szegediensis, Vol. 49, No. 1-2, 2005, p. 165-166.

Research output: Contribution to journalArticle

Mészáros, I. ; Láposi, Réka ; Veres, Szilvia ; Sárvári, E. ; Gáspár, Angéla ; Bai, Edit ; Oláh, Viktor ; Lakatos, G. / Effects of supplement UV-B radiation on photosynthesis performance and UV-B absorbing compounds in leaves of two oak species. In: Acta Biologica Szegediensis. 2005 ; Vol. 49, No. 1-2. pp. 165-166.
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