title: Plastoquinone: possible involvement in plant disease resistance.
abstract: The plant Solanum nigrum treated with the pathogen Phytophthora infestans-derived elicitor responded by elevated reactive oxygen species (ROS) production, lipid peroxidation and lipoxygenase (EC 1.13.11.12) activity in comparison with control plants indicating that oxidative stress took place. We demonstrate that these events are accompanied by a significant increase in plastoquinone (PQ) level. It is postulated that PQ may be associated with mechanisms maintaining a tightly controlled balance between the accumulation of ROS and antioxidant activity that determines the full expression of effective defence.
authors.affiliation: Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warszawa, Poland.
authors.forename: Urszula
authors.initials: U
authors.lastname: Maciejewska
authors.forename: Lidia
authors.initials: L
authors.lastname: Polkowska-Kowalczyk
authors.forename: Ewa
authors.initials: E
authors.lastname: Swiezewska
authors.forename: Anna
authors.initials: A
authors.lastname: Szkopinska
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D015227:Lipid Peroxidation / Q000502:physiology; D008084:Lipoxygenase / Q000378:metabolism; D010084:Oxidation-Reduction; D010838:Phytophthora / Q000472:pathogenicity; D010935:Plant Diseases / Q000382:microbiology; D018515:Plant Leaves / Q000166:cytology / Q000378:metabolism / Q000382:microbiology; D010971:Plastoquinone / Q000032:analysis / Q000378:metabolism* / Q000494:pharmacology; D017382:Reactive Oxygen Species / Q000378:metabolism; D019657:Solanaceae / Q000166:cytology / Q000378:metabolism* / Q000382:microbiology
chemical_list: D000975:Antioxidants; D017382:Reactive Oxygen Species; D008084:Lipoxygenase; D010971:Plastoquinone