English: The figure shows the time sequence of physiological events of the cotton plant during bacterial blight resistance. The resistance is characterized by a hypersensitive response of the cotton cells to Xcm (Delannoy et al., 2005). On being infected with the blight bacteria (1 and 3), the bacterial cells inject the effectors created to develop resistance genes within the host nuclei. When host R proteins recognize the bacteria, some specific mechanisms are activated through signaling pathways. Genes of the ERF IX3 group are transcribed parallel to ROS production (t = 3h; 2: localization of H2O2 in resistant leaves). Accumulation of salicylic acid in the systematic resistance stage culminates after the burst leading to activation of a 9- or 13-Lox gene (t = 9h), transcription of Ethylene-response transcription factors(ERF) genes, and synthesis of OPDA/JA (t = 12h). At the same time, flavonoids and total peroxidase activity are also released to aid in resisting the bacteria. The resistance aims at stopping bacterial growth (7: green line) as compared to growth in susceptible plants (7: blue line) and is preceded by the collapse of cells (6: condensation of the cytoplasm of HR cells), concluding the HR cycle (Jalloul et al., 2015).