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.
|Number of pages||7|
|Publication status||Published - Dec 1 1978|
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