MONITORING ENERGY CONVERSION IN PHOTOSYSTEM I OF CYANOBACTERIAL HETEROCYSTS BY PHOTOACOUSTIC SPECTROSCOPY.

Robert Carpentier, Hans C P Matthijs, Roger Leblanc, Geoffrey Hind

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Photoacoustic spectroscopy was used to monitor photosynthetic energy storage in heterocysts isolated from the cyanobacterium Anabaena 7120. Three main energy-conversion pathways have been identified in these specialized cells: cyclic electron transport in photosystem I, nitrogen fixation, and respiration. The aim of this study was to define the conditions for estimating their interdependence. The gas phase (air, Ar, N//2, H//2) under which the sample was prepared or incubated, as well as the presence of electron donors (NADPH, NADH, H//2) and KCN (an inhibitor of respiration), determined the relative flux through the pathways. Heterocysts in which respiration and nitrogen fixation are inhibited have afforded a useful system for specific study of cyclic electron transport around photosystem I.

Original languageEnglish
Pages (from-to)1136-1138
Number of pages3
JournalCanadian Journal of Physics
Volume64
Issue number9
StatePublished - Sep 1 1985
Externally publishedYes

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photoacoustic spectroscopy
respiration
energy conversion
nitrogenation
anabaena
electrons
energy storage
inhibitors
estimating
vapor phases
air
cells

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

MONITORING ENERGY CONVERSION IN PHOTOSYSTEM I OF CYANOBACTERIAL HETEROCYSTS BY PHOTOACOUSTIC SPECTROSCOPY. / Carpentier, Robert; Matthijs, Hans C P; Leblanc, Roger; Hind, Geoffrey.

In: Canadian Journal of Physics, Vol. 64, No. 9, 01.09.1985, p. 1136-1138.

Research output: Contribution to journalArticle

Carpentier, Robert ; Matthijs, Hans C P ; Leblanc, Roger ; Hind, Geoffrey. / MONITORING ENERGY CONVERSION IN PHOTOSYSTEM I OF CYANOBACTERIAL HETEROCYSTS BY PHOTOACOUSTIC SPECTROSCOPY. In: Canadian Journal of Physics. 1985 ; Vol. 64, No. 9. pp. 1136-1138.
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