Functions of S-nitrosylation in plant hormone networks

PARIS R,; IGLESIAS, M. J.; TERRILE MC; CASALONGUE, CA

Frontiers in Physiology

Frontiers

Lugar: Paris; Año: 2013 p. 294 - 298

1664-042X

MINI REVIEW A wide frame of physiological processes is regulated by nitric oxide (NO) and hormones in plants, such as germination, light reactions, pollen and root growth, gravitropic bending, stomatal closure, flowering and defense mechanisms, among others. Such overlapping roles raise the question of how NO and hormones crosstalk in signal transduction pathways to trigger equal physiological responses. However, up to day in most cases the mechanistic of NO action in hormone regulation and signaling is unknown. In plants and animals, NO has been largely accepted as a signaling molecule. One of the major ways NO and No-derived reactive species can accomplish their biological functions is thorugh post-translational protein-protein modification. In general, the transfer of a NO group to cysteine sulfhydryls on proteins, known as S-nitrosylation, is being recognized as a ubiquitous regulatory reaction comparable to phosphorylation. In plants, this form of redox modulation is emerging as a crucial mechanism for the transduction of NO bioactivity. Particularly, S-nitrosylation of target proteins is a hot topic in plant biology. This event is closely associated with hormone regulation and signal transduction. In addition, it has become clear that S-nitrosylation is a very high specificity biochemical reaction. However, it is still not as well reported how S-nitrosylation contribute to cell signaling in hormonal regulation processes. In this review we focus on NO and hormonal signaling pathway interactions particularly, the function of S-nitrosylation in hormone-mediated regulation in plant cells. Furthermore, different examples are highlighted and discussed.10.3389/fpls.2013.00294