Effect of ubiquinone 50 and viral infection on phytohemagglutinin activity in development of induced resistance in tobacco plants

The effects of ubiquinone 50 (synthetic coenzyme Q10) and viral infection on phytohemagglutinin activity were studied in the tobacco (Nicotiana tabacum L.) cultivar Samsun NN, which carries the necrosis-formation locus and exhibits hypersensitivity to tobacco mosaic virus (TMV) and ubiquinone (Q10). The treatment with Q10 and inoculation with TMV were accompanied by an increase in phytohemagglutinin activity, indicating that lectins may be involved in the development of defense responses in plants.