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Antioxidants 2016, 5(1), 8; doi:10.3390/antiox5010008

PP2A Phosphatase as a Regulator of ROS Signaling in Plants

1
Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
2
Plant Physiology Lab, Organisms and Systems Biology, Faculty of Biology, University of Oviedo, 33006 Oviedo, Spain
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: David Burritt
Received: 29 January 2016 / Revised: 21 February 2016 / Accepted: 29 February 2016 / Published: 2 March 2016
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Abstract

Reactive oxygen species (ROS) carry out vital functions in determining appropriate stress reactions in plants, but the molecular mechanisms underlying the sensing, signaling and response to ROS as signaling molecules are not yet fully understood. Recent studies have underscored the role of Protein Phosphatase 2A (PP2A) in ROS-dependent responses involved in light acclimation and pathogenesis responses in Arabidopsis thaliana. Genetic, proteomic and metabolomic studies have demonstrated that trimeric PP2A phosphatases control metabolic changes and cell death elicited by intracellular and extracellular ROS signals. Associated with this, PP2A subunits contribute to transcriptional and post-translational regulation of pro-oxidant and antioxidant enzymes. This review highlights the emerging role of PP2A phosphatases in the regulatory ROS signaling networks in plants. View Full-Text
Keywords: plant; reactive oxygen species (ROS); signaling; protein phosphorylation; Protein Phosphatase 2A (PP2A) plant; reactive oxygen species (ROS); signaling; protein phosphorylation; Protein Phosphatase 2A (PP2A)
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Rahikainen, M.; Pascual, J.; Alegre, S.; Durian, G.; Kangasjärvi, S. PP2A Phosphatase as a Regulator of ROS Signaling in Plants. Antioxidants 2016, 5, 8.

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