title: Methyl jasmonate promotes the transient reduction of the levels of 2-Cys peroxiredoxin in Ricinus communis plants.
abstract: Jasmonates are signaling molecules that play a key role in the regulation of metabolic processes, reproduction and defense against insects and pathogens. This study investigated the effects of methyl jasmonate on the protein pattern of Ricinus communis plants and the activity of guaiacol peroxidase, an antioxidant enzyme. Methyl jasmonate treatment caused a transient reduction in guaiacol peroxidase activity. A similar response was observed for the levels of 2-Cys peroxiredoxin protein. Moreover, the levels of the small and large chains of Rubisco were also reduced. The transient reduction of the levels and activity of antioxidant enzymes could account for the increase in the levels of H2O2, an important signaling molecule in plant defense.
authors.affiliation: Laboratório de Química e Função de Proteínas e Peptídeos, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense (LQFPP/CBB/UENF), Av. Alberto Lamego, 2000, Horto, Campos dos Goytacazes CEP 28013-602, Brazil.
authors.forename: Alexandra Martins
authors.initials: AM
authors.lastname: dos Santos Soares
authors.forename: Thiago Freitas
authors.initials: TF
authors.lastname: de Souza
authors.forename: Sarah Jane
authors.initials: SJ
authors.lastname: de Souza Domingues
authors.forename: Tânia
authors.initials: T
authors.lastname: Jacinto
authors.forename: Olga Lima
authors.initials: OL
authors.lastname: Tavares Machado
mesh_terms: D000085:Acetates / Q000494:pharmacology*; D000595:Amino Acid Sequence; D002367:Ricinus communis / Q000187:drug effects / Q000201:enzymology*; D003517:Cyclopentanes / Q000494:pharmacology*; D054883:Oxylipins; D010446:Peptide Fragments; D009195:Peroxidase / Q000187:drug effects / Q000378:metabolism; D010544:Peroxidases / Q000187:drug effects / Q000378:metabolism*; D054464:Peroxiredoxins; D010937:Plant Growth Regulators / Q000494:pharmacology*; D010940:Plant Proteins / Q000187:drug effects / Q000302:isolation & purification / Q000378:metabolism; D012273:Ribulose-Bisphosphate Carboxylase / Q000737:chemistry / Q000378:metabolism; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D000085:Acetates; D003517:Cyclopentanes; D054883:Oxylipins; D010446:Peptide Fragments; D010937:Plant Growth Regulators; D010940:Plant Proteins; C072239:methyl jasmonate; D010544:Peroxidases; C121048:guaiacol peroxidase; D054464:Peroxiredoxins; D009195:Peroxidase; D012273:Ribulose-Bisphosphate Carboxylase