Fig. 1

Fluorescence of bacterial pellets under QDs biosynthesis conditions. a Cell pellets of the 12 resistant bacterial isolates producing QDs after 48 h treatment. b Fluorescence color of cell pellets from one representative bacterial isolate (strain 3) across time. Cells were treated with CdCl₂ (10 mg/L) in PBS buffer and pellets were exposed to UV light (365 nm) to detect fluorescence emission