Adaptation of photosystem II to high and low light in wild-type and triazine-resistant Canola plants: analysis by a fluorescence induction algorithm

J.J.S. van Rensen, W.J. Vredenberg

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Plants of wild-type and triazine-resistant Canola (Brassica napus L.) were exposed to very high light intensities and after 1 day placed on a laboratory table at low light to recover, to study the kinetics of variable fluorescence after light, and after dark-adaptation. This cycle was repeated several times. The fast OJIP fluorescence rise curve was measured immediately after light exposure and after recovery during 1 day in laboratory room light. A fluorescence induction algorithm has been used for resolution and analysis of these curves. This algorithm includes photochemical and photo-electrochemical quenching release components and a photo-electrical dependent IP-component. The analysis revealed a substantial suppression of the photo-electrochemical component (even complete in the resistant biotype), a partial suppression of the photochemical component and a decrease in the fluorescence parameter Fo after high light. These effects were recovered after 1 day in the indoor light.
Original languageEnglish
Pages (from-to)191-200
JournalPhotosynthesis Research
Volume108
Issue number2-3
DOIs
Publication statusPublished - 2011

Keywords

  • brassica-napus l
  • chenopodium-album
  • chloroplasts
  • photoinhibition
  • kinetics
  • photosynthesis
  • turnover
  • oxygen
  • photoinactivation
  • cyanobacteria

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