Binary Oscillation of Delayed Luminescence: Evidence of the Participation of QB in the Charge Recombination

É. Hideg, Sándor Demeter

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The flash-induced oscillation of a slowly decaying component of delayed luminescence (half time ~ 42 s) was investigated in spinach chloroplasts for various redox states of the secondary acceptor pool (QB)- In preilluminated chloroplasts (30 s light followed by 5 min dark) the slow component exhibited a period-4 oscillation as a function of flash number. Upon oxidation of a major part of the QB pool by dark-adaptation or by ferricyanide treatment of chloroplasts, the period-4 oscillation was converted into a period-2 oscillation, providing direct experimental evidenc of the participation of QB in the charge recombination reaction. The measured oscillatory patterns could be simulated in model calculations by assuming that the slow component originatesfrom charge recombination of the redox couples S2QB and S3QB .

Original languageEnglish
Pages (from-to)827-831
Number of pages5
JournalZeitschrift fur Naturforschung - Section C Journal of Biosciences
Volume40
Issue number11-12
DOIs
Publication statusPublished - Oct 1 1985

Fingerprint

Chloroplasts
Luminescence
Genetic Recombination
Oxidation-Reduction
Dark Adaptation
Spinacia oleracea
Oxidation
Light
hexacyanoferrate III

Keywords

  • Chloroplast
  • Delayed Luminescence
  • Oscillation
  • Oxygen Evolution
  • Secondary Quinone Acceptor

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

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N2 - The flash-induced oscillation of a slowly decaying component of delayed luminescence (half time ~ 42 s) was investigated in spinach chloroplasts for various redox states of the secondary acceptor pool (QB)- In preilluminated chloroplasts (30 s light followed by 5 min dark) the slow component exhibited a period-4 oscillation as a function of flash number. Upon oxidation of a major part of the QB pool by dark-adaptation or by ferricyanide treatment of chloroplasts, the period-4 oscillation was converted into a period-2 oscillation, providing direct experimental evidenc of the participation of QB in the charge recombination reaction. The measured oscillatory patterns could be simulated in model calculations by assuming that the slow component originatesfrom charge recombination of the redox couples S2QB −and S3QB −.

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