Defensive response of tomato genotypes to viral infections conditioned by the phytosanitary status of plants of recurring generations

Abstract

The reactions associated with the infection of tobacco mosaic virus (TMV) and tomato aspermy virus (TAV) of 4 tomato genotypes (tolerant, sensitive, resistant to VMT) in the case of primarily infected plants (G0) and those subjected to reinfection in later generations (G1 or G4). The evaluated indices - peroxidase activity (POX), catalase (CAT) and hydrogen peroxide content, expressed a high specificity depending on the genotype-virus studied system, the post-infection stage and the status of the plant primary infected or reinfected in the next generations (G1 and G4). Significant differences were established according to POX, CAT indices and H2O2 content between both infected and healthy plants, as well as between primarily infected and reinfected plants.