Photoacoustic detection of energy conversion in a Photosystem II submembrane preparation from spinach

Robert Carpentier, Herbert Y. Nakatani, Roger M. Leblanc

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Photoacoustic spectroscopy has been used to monitor the energy conversion in Photosystem II submembrane fractions isolated from spinach. The extent of detected photochemistry was studied as a function of the modulated light intensity. Half of the reaction centers were saturated at an intensity of 0.5 W·m-2. However, the energy storage yield extrapolated to a modulated light intensity of zero was comparable to the yields reported for chloroplasts or algae. It is suggested that the molecular component responsible for the energy storage detected by photoacoustics at a modulation frequency of 35 Hz is located at the level of electron transport.

Original languageEnglish (US)
Pages (from-to)470-473
Number of pages4
JournalBBA - Bioenergetics
Volume808
Issue number3
DOIs
StatePublished - Aug 7 1985
Externally publishedYes

Keywords

  • (Spinach chloroplast)
  • Electron transport
  • Energy conversion
  • Photoacoustic spectroscopy
  • Photosynthesis
  • Photosystem II

ASJC Scopus subject areas

  • Biophysics

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