Bacterial QS expands the Xanthomonas campestris pv. campestris invasion of host tissue to trigger host-chlorophagy and maximize disease symptom

Using QS-responsive whole-cell bioreporters of Xcc and cabbage (Brassica oleracea) as a model system and confocal microscopy, we show a detailed chronology of QS-facilitated Xcc colonization in the host mesophyll region. We report the QS-enabled bacterial localization of parenchymal chloroplast within heterogeneously invaded host mesophyll tissue, leading triggered leaf-chlorosis and systemic infection.