SIMULTANEOUS SATURATION OF VARIABLE FLUORESCENCE YIELD AND PHOTOACOUSTICALLY MONITORED THERMAL EMISSION IN THYLAKOID MEMBRANES

ROBERT CARPENTIER, THOMAS G. OWENS, Roger Leblanc

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Thermal and fluorescence emission from thylakoid membranes were monitored simultaneously in a photoacoustic cell. A close relationship existing between variable fluorescence and variable thermal emissions is demonstrated. The modulated measuring beam of the photoacoustic spectrophotometer was used to study the effect of light intensity on the energy storage yield and on the variable fluorescence yield. The half‐saturation light intensities obtained for both parameters were 8.5 and 9.1 W m−2, respectively. The similar sensitivity of energy storage and variable fluorescence yield to light intensity indicates that electron transfer with plastoquinone as last acceptor is probably responsible for the photoacoustically monitored energy storage.

Original languageEnglish (US)
Pages (from-to)565-569
Number of pages5
JournalPhotochemistry and Photobiology
Volume53
Issue number4
DOIs
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry
  • Physical and Theoretical Chemistry

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