On the nature of the photosynthetic energy storage monitored by photoacoustic spectroscopy

Robert Carpentier, Roger M. Leblanc, Murielle Mimeault

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The photosynthetic energy storage yield of uncoupled thylakoid membranes was monitored by photoacoustic spectroscopy at various measuring beam intensities. The energy storage rate as evaluated by the half-saturation measuring beam intensity (i50) was inhibited by 3-(3,4-dichlorophenyl)-1,1 dimethylurea, by heat inactivation or by artificial electron acceptors specific for photosystem I or photosystem II; and was activated by electron donors to photosystem I. The reactions involving both photosystems were all characterized by a similar maximal energy storage yield of 16±2 percent. The data could be interpreted if we assumed that the energy storage elicited by the photosystems at 35 Hz is detected at the level of the plastoquinone pool.

Original languageEnglish (US)
Pages (from-to)313-318
Number of pages6
JournalPhotosynthesis Research
Volume23
Issue number3
DOIs
StatePublished - Mar 1 1990
Externally publishedYes

Keywords

  • electron transfer
  • energy storage
  • photoacoustic spectroscopy
  • photosynthesis
  • plastoquinone
  • thylakoid membranes

ASJC Scopus subject areas

  • Plant Science

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