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Reconsidering the nature and mode of action of metabolite retrograde signals from the chloroplast

By Gonzalo Martín Estavillo, Kai Xun Chan, Su Yin ePhua and Barry James Pogson


Plant organelles produce retrograde signals to alter nuclear gene expression in order to coordinate their biogenesis, maintain homeostasis or optimize their performance under adverse conditions. Many signals of different chemical nature have been described in the past decades, including chlorophyll intermediates, reactive oxygen species and adenosine derivatives. While the effects of retrograde signalling on gene expression are well understood, the initiation and transport of the signals and their mode of action have either not been resolved, or are a matter of speculation. Moreover, retrograde signalling should be consider as part of a broader cellular network, instead of as separate pathways, required to adjust to changing physiologically relevant conditions. Here we summarize current plastid retrograde signalling models in plants, with a focus on new signalling pathways, SAL1-PAP, MEcPP and β- cyclocitral, and outline missing links or future areas of research that we believe need to be addressed to have a better understanding of plant intracellular signalling networks

Topics: gene regulation, drought, metabolite, retrograde signaling, high light, 3’-phosphoadenosine 5’-phosphate, Plant culture, SB1-1110
Publisher: Frontiers Media S.A.
Year: 2013
DOI identifier: 10.3389/fpls.2012.00300
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