Investigation of electron transport in the photosynthetic systems of higher plants by the EPR method-VI. Kinetics of photo-induced redox conversions of P700 in the regime of continuous and pulsed illumination of variable duration

E. K. Ruuge, A. N. Tikhonov

Research output: Contribution to journalArticlepeer-review

Abstract

It is shown that in leaves oxidation of P700 is not observed on exposure to a short flash (≲10 μsec) delivered both in the dark or against the background of illumination exciting both photosystems. If P700 is in the completely or partially oxidized state, then in response to a flash with a duration of ≲10 μsec rapid reduction of P700+ is observed. Light flashes of 700 and 720 nm with a duration of 0·5 msec delivered in the dark cause oxidation of P700. Oxidation of P700 is not observed of flashes of 660 nm with duration of 0·5 msec are delivered.

Original languageEnglish
Pages (from-to)847-853
Number of pages7
JournalBiophysics
Volume23
Issue number5
Publication statusPublished - Dec 1 1978
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics

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