NO signaling in plant immunity: A tale of messengers. (April 2015)

• Record Type: Journal Article
• Authors: Trapet, Pauline; Kulik, Anna; Lamotte, Olivier; Jeandroz, Sylvain; Bourque, Stéphane; Nicolas-Francès, Valérie; Rosnoblet, Claire; Besson-Bard, Angélique; Wendehenne, David
• Is Part Of: Phytochemistry. Volume 112(2015:Apr.)
• Page Start: 72
• Page End: 79
• Publication Date: 2015-04
• Subjects: Calcium -- Calmodulin -- Cell death -- Nitric oxide -- Reactive oxygen species -- Signaling; Botanical chemistry -- Periodicals; Biochemistry -- Periodicals; Botany -- Periodicals; Chimie végétale -- Périodiques; 572.2
• DOI: 10.1016/j.phytochem.2014.03.015
• Languages: English
• ISSNs: 0031-9422

Abstract

Graphical abstract: NO is emerging as an important component of the mechanism coordinating and regulating Ca 2+ and ROS signaling in plant immunity. Highlights: Nitric oxide (NO) is a signaling component of the plant immune system. NO and Ca 2+, as signals mobilized in plant challenged by pathogens, interact at multiple levels. NO controls excessive ROS production and related effects including excessive cell death. NO potentiates the induction of cell death triggered by ROS. S-nitrosylation is a major NO-dependent post-translational protein in plant immunity. Abstract: Nitric oxide (NO) is a free radical gas involved in a myriad of plant physiological processes including immune responses. How NO mediates its biological effects in plant facing microbial pathogen attack is an unresolved question. Insights into the molecular mechanisms by which it propagates signals reveal the contribution of this simple gas in complex signaling pathways shared with reactive oxygen species (ROS) and the second messenger Ca 2+ . Understanding of the subtle cross-talks operating between these signals was greatly improved by the recent identification and the functional analysis of proteins regulated through S-nitrosylation, a major NO-dependent post-translational protein modification. Overall, these findings suggest that NO is probably an important component of the mechanism coordinating and regulating Ca 2+ and ROS signaling in plant immunity.