principles of redox control in photosynthesis gene expression.pdf

Copyright?Physiologia Plantarum2001PHYSIOLOGIA PLANTARUM 112: 1±9. 2001Printed in IrelandDall rights reser6edISSN0031-9317MinireviewPrinciples of redox control in photosynthesis gene expressionThomas Pfannschmidta, John F. Allenband Ralf Oelmuèllera,*aInstitute of General Botany,Department of Plant Physiology,Uni6ersity of Jena,Dornburger ,D-07743Jena,GermanybPlant Biochemistry,Lund Uni6ersity,Box117,SE-221 00Lund,Sweden*Corresponding author,e-mail:******@Received 28 August 2000; revised 12 December 2000Light is one of the most important environmental factors some cases, oxygen acts as a different environmental, light-in-dependent stimulus of photosynthetic gene expression, provid-inˉuencing gene expression in anisms. Inparticular, genes ponents of the photosynthetic ma- ing an additional redox signal and a different kind of redoxcontrol. In this review, we summarise present knowledge aboutchinery show light-dependent expression. In recent years, ithas e clear that photosynthesis itself contributes impor- such redox control mechanisms and mon proper-tant signals to this light control of gene expression by means ties as well as differences in the various signalling suggest that there is an urgent need for a clear distinctionof changes in the reduction/oxidation (redox) state of sig-between different kinds of redox control. Accordingly, wenalling molecules. Such changes in redox state are induced bychanges in quality and quantity of the incident light. Redox propose a categorisation into perceptional and transductionalsignalling mechanisms therefore provide photosynthesis with redox control. These categories are de?ned and examplesgiven. The generalisation parability of results ob-the possibility of acclimational changes in the structure of thephotosynthetic apparatus via a feedback control of photosyn- tained in different physiological test systems and species arethesis gene expression. The great variety of these signalling critically