Annotation
The mechanisms of the effect of natural illuminance on the initial $(\Phi^0)$ and maximum $(\Phi^{max})$ quantum yields of phytoplankton fluorescence and the efficiency of the initial stages of photosynthesis were studied. Remote measurements of $\Phi^0$ and $\Phi^{max}$ in phytoplankton samples were performed using the double-beam laser method. It was found that the principal mechanisms of control of the fluorescence yield by the light are the "energy-dependent" fluorescence quenching that occurs at illuminances about 5-20 klx and the photoinhibition of the initial stages of photosynthesis at illuminances of 30-100 klx.
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
M.Yu. Gorbunov, A.M. Chekalyuk
Department of Quantum Radiophysics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Department of Quantum Radiophysics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia