Effects of UV-B radiation and water stress on chlorophyll fluorescence parameters and activity of xanthophyll cycle in leaves of sessile oak (Quercus petraea) seedlings

Erzsébet Szollosi, Szilvia Veres, Péter Kanalas, Viktor Oláh, Ádám Solti, Éva Sárvári, Ilona Mészáros

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In the present study we investigated the photosynthetic responses of sessile oak seedlings to UV-B radiation and water stress in growth chamber experiment. Seedlings of sessile oak showed sensitivity to enhanced UV-B radiation which appeared in decreases of maximum photochemical efficiency (Fv/Fm) and actual photochemical efficiency of PSII (△F/Fm'). UV-B radiation and water stress induced 150 and 170 % increase of non-photochemical fluorescence quenching (NPQ) and threefold and fourfold elevation of activity of xanthophyll cycle as compared to the control, respectively. Seedlings exposed simultaneously to UV-B and water stress induced larger decrease of Fv/Fm, SF/Fm' and RFD than those exposed separately to enhanced UV-B or water withdrawal as compared to control plants. Both UV-B radiation and water stress increased non-photochemical quenching with a parallel enhancement of zeaxanthin formation.

Original languageEnglish
Pages (from-to)241-242
Number of pages2
JournalActa Biologica Szegediensis
Volume52
Issue number1
Publication statusPublished - Dec 1 2008

Keywords

  • Non-photochemical quenching
  • Photochemical efficiency of PSII
  • Sessile oak
  • UV-B radiation
  • Water stress
  • Xanthophyll cycle

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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