Acta Biochimica Polonica · 2002 · 25 citations · 0 references
Life SciencesPlant BiologyPlant SciencesPlant BiochemistryPlant PhysiologyPlant-microbe InteractionsAntioxidant DefenseOxidative StressPlant Defense ResponsesPlant Disease ResistancePlant-pathogen InteractionsReactive Oxygen SpeciesAntioxidant Defense MechanismsAntioxidant Defense SystemsCellular Antioxidant ResponseOxidative Stress In PathogenesisPhytophthora PathogenicityPlant Antioxidant DefensePlant Disease Resistance MechanismsRedox Regulation Of Defense
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.