PERIODICITY AND CHAOS IN A PHOTOSYNTHETIC SYSTEM

In this paper experimental results of investigation of the oscillation s in a photosynthetic system are presented and a model for their inter pretation is suggested. Periodicities in photosynthetic systems detect ed in earlier studies by physical chemical methods can be also detecte d by means of recording the potential difference between two point ele ctrodes. The observed dependences demonstrate a wide range of various types of behaviour of the system, working, e.g. in periodic, quasiperi odic, chaotic or 'pulse' regimes. Since the until-now-used 2-dimension al theoretical model, based on the existence of two dominant autocatal ytical processes, appeared not to be sufficient for explaining such ty pes of the regimes, a generalized 3-dimensional autocatalytical model is suggested, which is able to explain all the above mentioned photosy nthetic regimes.