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- W2167740953 abstract "Photosynthetic electron transport is performed by a chain of redox components that are electrochemically connected in series. Its efficiency depends on the balanced action of the photosystems and on the interaction with the dark reaction. Plants are sessile and cannot escape from environmental conditions such as fluctuating illumination, limitation of CO2 fixation by low temperatures, salinity, or low nutrient or water availability, which disturb the homeostasis of the photosynthetic process. Photosynthetic organisms, therefore, have developed various molecular acclimation mechanisms that maintain or restore photosynthetic efficiency under adverse conditions and counteract abiotic stresses. Recent studies indicate that redox signals from photosynthetic electron transport and reactive oxygen species (ROS) or ROS-scavenging molecules play a central role in the regulation of acclimation and stress responses. The underlying signalling network of photosynthetic redox control is largely unknown, but it is already apparent that gene regulation by redox signals is of major importance for plants. Signalling cascades controlling the expression of chloroplast and nuclear genes have been identified and dissection of the different pathways is advancing. Because of the direction of information flow, photosynthetic redox signals can be defined as a distinct class of retrograde signals in addition to signals from organellar gene expression or pigment biosynthesis. They represent a vital signal of mature chloroplasts that report their present functional state to the nucleus. Here we describe possible problems in the elucidation of redox signalling networks and discuss some aspects of plant cell biology that are important for developing suitable experimental approaches. The photosynthetic function of chloroplasts represents an important sensor that integrates various abiotic changes in the environment into corresponding molecular signals, which, in turn, regulate cellular activities to counterbalance the environmental changes or stresses." @default.
- W2167740953 created "2016-06-24" @default.
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- W2167740953 date "2008-05-20" @default.
- W2167740953 modified "2023-10-18" @default.
- W2167740953 title "Potential regulation of gene expression in photosynthetic cells by redox and energy state: approaches towards better understanding" @default.
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- W2167740953 doi "https://doi.org/10.1093/aob/mcn081" @default.
- W2167740953 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2707342" @default.
- W2167740953 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18492734" @default.
- W2167740953 hasPublicationYear "2008" @default.