Principles of redox control in photosynthesis gene expression

Light is one of the most important environmental factors some cases, oxygen acts as a different environmental, light-independent stimulus of photosynthetic gene expression, providinfluencing gene expression in photosynthetic organisms. In particular, genes for components of the photosynthetic maing an additional redox signal and a different kind of redox control. In this review, we summarise present knowledge about chinery show light-dependent expression. In recent years, it has become clear that photosynthesis itself contributes imporsuch redox control mechanisms and analyse common propertant signals to this light control of gene expression by means ties as well as differences in the various signalling pathways. We suggest that there is an urgent need for a clear distinction of changes in the reduction/oxidation (redox) state of sigbetween different kinds of redox control. Accordingly, we nalling molecules. Such changes in redox state are induced by changes in quality and quantity of the incident light. Redox propose a categorisation into perceptional and transductional signalling mechanisms therefore provide photosynthesis with redox control. These categories are defined and examples given. The generalisation and comparability of results obthe possibility of acclimational changes in the structure of the photosynthetic apparatus via a feedback control of photosyntained in different physiological test systems and species are thesis gene expression. The great variety of these signalling critically discussed. mechanisms is summarised under the term ‘redox control’. In