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

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

Research output: Contribution to journalConference article

15 Scopus citations

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 (US)
Pages (from-to)1136-1138
Number of pages3
JournalCanadian journal of physics
Volume64
Issue number9
StatePublished - Sep 1 1985
Externally publishedYes
EventProc of the 4th Int Top Meet of Photoacoust, Therm, and Relat Sci, Esterel -
Duration: Aug 4 1985Aug 8 1985

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'MONITORING ENERGY CONVERSION IN PHOTOSYSTEM I OF CYANOBACTERIAL HETEROCYSTS BY PHOTOACOUSTIC SPECTROSCOPY.'. Together they form a unique fingerprint.

  • Cite this