Plastoquinone: possible involvement in plant disease resistance.
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.
Maciejewska
Urszula
U
Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warszawa, Poland.
Polkowska-Kowalczyk
Lidia
L
Swiezewska
Ewa
E
Szkopinska
Anna
A
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
D000975:Antioxidants; D017382:Reactive Oxygen Species; D008084:Lipoxygenase; D010971:Plastoquinone