Biochemical characterization of oxidative burst during interaction between Solanum lycopersicum and Fusarium oxysporum f. sp. lycopersici

摘要: Abstract The oxidative burst or rapid and transient production of large amount reactive oxygen species (ROS) belongs to the fastest earliest active defense responses microbial infection known in plants. aim this study was investigate intensity timing ROS formation, lipid peroxidation expression antioxidant enzymes as initial tomato ( Solanum lycopersicum L.) against invading necrotrophic pathogen Fusarium oxysporum f. sp. lycopersici . concentration hydrogen peroxide (H 2 O ) 2.6 times higher at 24 h post-inoculation (hpi) 4.4 72 hpi extracts inoculated roots than control. An increase total phenolic content also detected roots. activities antioxidative enzymes, viz., superoxide dismutase (SOD, EC 1.15.1.1), catalase (CAT, 1.11.1.6), guaiacol peroxidase (GPX, 1.11.1.7) ascorbate (APX, 1.11.1.11), increased response inoculation. SOD activity 48 hpi 2.9 that CAT showed a decrease after 24 hpi GPX APX insignificant generated interaction between F. may be an early first line by host mounted pathogen. However, seemingly less efficient system (particularly 24 hpi) leading sustained accumulation observed rate indicate biochemical events are largely favour pathogen, thus making host–pathogen compatible combination. It is discussed served weapon for because not strong enough impede ingress host.