title: Nitric oxide-cold stress signalling cross-talk, evolution of a novel regulatory mechanism.
abstract: Plants enhance their cold stress tolerance by cold acclimation, a process which results in vast reprogramming of transcriptome, proteome and metabolome. Evidence suggests nitric oxide (NO) production during cold stress which regulates genes (especially the C-repeat binding factor (CBF) cold stress signalling pathway), diverse proteins including transcription factors (TFs) and phosphosphingolipids. About 59% (redox), 50% (defence/stress) and 30% (signalling) cold responsive proteins are modulated by NO-based post translational modifications (PTMs) namely S-nitrosylation, tyrosine nitration and S-glutathionylation, suggesting a cross-talk between NO and cold. Analysis of cold stress responsive deep proteome in apoplast, mitochondria, chloroplast and nucleus suggested continuation of this cross-talk in sub-cellular systems. Modulation of cold responsive proteins by these PTMs right from cytoskeletal elements in plasma membrane to TFs in nucleus suggests a novel regulation of cold stress signalling. NO-mediated altered protein transport in nucleus seems an important stress regulatory mechanism. This review addresses the NO and cold stress signalling cross-talk to present the overview of this novel regulatory mechanism.
authors.affiliation: Molecular Plant Physiology and Proteomics Laboratory, Department of Botany, University of Delhi, Delhi, India.
authors.forename: Ankita
authors.initials: A
authors.lastname: Sehrawat
authors.forename: Ravi
authors.initials: R
authors.lastname: Gupta
authors.forename: Renu
authors.initials: R
authors.lastname: Deswal
mesh_terms: D057773:Cold Shock Proteins and Peptides; D058639:Cold-Shock Response; D009569:Nitric Oxide; D010940:Plant Proteins; D040901:Proteomics; D015398:Signal Transduction
chemical_list: D057773:Cold Shock Proteins and Peptides; D010940:Plant Proteins; D009569:Nitric Oxide
keywords: Cold stress responsive proteins; Nitration; Plant proteomics; S-Glutathionylation; S-nitrosylation