Functions of S-nitrosylation in plant hormone networks

Abstract

In plants,a wide frame of physiological processes are regulated in liaison by both,nitricoxide(NO)and hormones.Such overlapping roles raise the question of how the cross-talk between NO and hormone strigger common physiological responses. Ingeneral, NO has been largely accepted as a signaling molecule that works in different processes. Among the most relevant ways NO and the NO-derived reactive species can accomplish their biological functions it is worthy to mention post-translational protein modifications. In the last years, S-nitrosylation has been the most studied NO-dependent regulatory mechanism. Briefly, S-nitrosylation is a redox-based mechanism for cysteine residue modification and is being recognized as aubiquitous regulatory reaction comparable to phosphorylation. Therefore, it is emerging as a crucial mechanism for the transduction of NO bioactivity in plants and animals. In this mini-review, we provide an overview on S-nitrosylation of target proteins related to hormone networks in plants. © 2013 París, Iglesias, Terrile and Casalongué.