[Study of charge separation in the reaction centers of photosystem 2 of higher plants using fluorescence magnetic modulation].
Modulation of fluorescence in higher plants leaves by the external magnetic field was studied. It has been found that fluorescence yield increases under the effect of the magnetic field up to 0.3% with the induction B congruent to 10-20 mT. The magnetic effect is related with the spin phenomena during charge separation in the Photosystem 2. Patterns of magnetic effect on fluorescence in different regions of the induction curve were studied. Two types of magnetic effect corresponding to open and closed reaction centres were shown to exist. In the first ones the half-saturation field of the effect B 1/2 = 20 mT, in the second ones B 1/2 = 1.6 mT. Life times of the charge pairs in open and closed centres (250 ps and greater than 6 ns) were determined.
D007700:Kinetics; D008280:Magnetics; D010788:Photosynthesis; D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods
D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins
Izuchenie razdeleniia zariadov v reaktsionnykh tsentrakh fotosistemy II vysshikh rasteniĭ metodom magnitnoĭ moduliatsii fluorestsentsii.