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Impact of the ion transportome of chloroplasts on the optimization of photosynthesis.

Review article
Authors Ildikò Szabò
Cornelia Spetea
Published in Journal of experimental botany
Volume 68
Issue 12
Pages 3115–3128
ISSN 1460-2431
Publication year 2017
Published at Department of Biological and Environmental Sciences
Pages 3115–3128
Language en
Subject categories Biological Sciences, Cell Biology, Botany, Biochemistry and Molecular Biology


Ions play fundamental roles in all living cells, and their gradients are often essential to fuel transport, regulate enzyme activities, and transduce energy within cells. Regulation of their homeostasis is essential for cell metabolism. Recent results indicate that modulation of ion fluxes might also represent a useful strategy to regulate one of the most important physiological processes taking place in chloroplasts, photosynthesis. Photosynthesis is highly regulated, due to its unique role as a cellular engine for growth in the light. Controlling the balance between ATP and NADPH synthesis is a critical task, and availability of these molecules can limit the overall photosynthetic yield. Photosynthetic organisms optimize photosynthesis in low light, where excitation energy limits CO2 fixation, and minimize photo-oxidative damage in high light by dissipating excess photons. Despite extensive studies of these phenomena, the mechanism governing light utilization in plants is still poorly understood. In this review, we provide an update of the recently identified chloroplast-located ion channels and transporters whose function impacts photosynthetic efficiency in plants.

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