The constant interaction of parasitic systems and related conflicts of interest of participating organisms in each other lead to morphological as well as physiological adaptations. The glucosinolate-myrosinase-system of Brassicaceae presents both a consecutive and inducible defence strategy towards different phytopathogens. Furthermore, those are also suspected of communicative function and thus cause priming reaction in different plant (organs).Therefore in this work for the first time we investigate the compatible interaction of the model system of white mustard Sinapis alba and the causative agent of black rot disease Xanthomonas campestris pv. campestris. Here, the effects of induced bacterial infection are analysed over a defined period of time via light and electron microscopy as well as physiological differences in comparison to controll group. Based on obtained observation specific disease development of black rot disease is shown in different mustard plants. The bacteria predominately colonize both substomatal area as well as intercellular space of parenchyma in the leaves. Likewise, there is significant but time-delated change in different metabolic substances. The qualities and quantities of individual glucosinolates and their degradation products demonstrate high plasticity towards the phytopathogen. Moreover, there are clear differences between both treatment groups based on antioxidative stress parameters and hormonal profile. Accordingly, a delayed immune response and evidence of a specific conversion of individual metabolites can be observed. Thus, different substances can take a possible communicative function between the plants and so involve an adaptive strategy on the part of host towards the phytopathogen.