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REVIEW: Efficiency of Photochemical Stages of Photosynthesis in Purple Bacteria (A Critical Survey)

A. Yu. Borisov

Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, 119992 Moscow, Russia; fax: (495) 939-3181; E-mail: ayb280630@yandex.ru

Received October 28, 2013; Revision received December 1, 2013
Based on currently available data, the energy transfer efficiency in the successive photophysical and photochemical stages has been analyzed for purple bacteria. This analysis covers the stages starting from migration of the light-induced electronic excitations from the bulk antenna pigments to the reaction centers up to irreversible stage of the electron transport along the transmembrane chain of cofactors-carriers. Some natural factors are revealed that significantly increase the rates of efficient processes in these stages. The influence on their efficiency by the “bottleneck” in the energy migration chain is established. The overall quantum yield of photosynthesis in these stages is determined.
KEY WORDS: photosynthesis, purple bacteria, efficiency of energy migration and trapping

DOI: 10.1134/S0006297914030080