title: Reboot the system thanks to protein post-translational modifications and proteome diversity: How quiescent seeds restart their metabolism to prepare seedling establishment.
abstract: Once liberated in their environment, orthodox seeds live in a quiescent dehydrated state not totally exempt of essential molecular events as, for example, the capacity of breaking dormancy during after-ripening. Upon imbibition, if internal regulatory padlocks are released and given adequate external conditions, the quiescent seed is able to "reboot" its system and, thus, germinate. Recent studies unraveled the crucial importance of protein PTMs in seed dormancy, longevity and vigor. As compared to other plant developmental stages, the seed proteome appears quite unique and diverse. Seed proteins encompass several functional classes from primary and secondary metabolism to structural and antimicrobial defense. In the dry state, oxidative damages can occur due to reactive oxygen and nitrogen species produced by non-enzymatic reactions. These reactive species can affect proteins by the oxidation of their amino acids in a post-translational manner. The hormone abscisic acid regulates major aspects of seed life including dormancy and germination. This signaling pathway has been shown to rely on several PTMs such as protein phosphorylation or ubiquitination.
authors: Institut Jean-Pierre Bourgin, Unité Mixte de Recherche, Institut National de la Recherche Agronomique-AgroParisTech - Team, Physiology of Seed Germination, Versailles, France.
authors: Erwann
authors: E
authors: Arc
authors: Marc
authors: M
authors: Galland
authors: Gwendal
authors: G
authors: Cueff
authors: Béatrice
authors: B
authors: Godin
authors: Imen
authors: I
authors: Lounifi
authors: Dominique
authors: D
authors: Job
authors: Loïc
authors: L
authors: Rajjou
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism / Q000494:pharmacology; D005875:Gibberellins / Q000378:metabolism / Q000494:pharmacology; D063245:Plant Development; D010937:Plant Growth Regulators / Q000378:metabolism / Q000494:pharmacology; D010940:Plant Proteins / Q000378:metabolism*; D010944:Plants / Q000378:metabolism; D011499:Protein Processing, Post-Translational; D020543:Proteome / Q000378:metabolism*; D036226:Seedlings / Q000378:metabolism; D012639:Seeds / Q000254:growth & development / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects
chemical_list: D005875:Gibberellins; D010937:Plant Growth Regulators; D010940:Plant Proteins; D020543:Proteome; D000040:Abscisic Acid