Fig. 8From: Sustainable microbial cell nanofactory for zinc oxide nanoparticles production by zinc-tolerant probiotic Lactobacillus plantarum strain TA4SEM micrographs of L. plantarum strain TA4. Control group (unexposed to Zn2+) (a), Treatment group (exposed to Zn2+) (b), EDX spectra of L. plantarum strain TA4 exposed to Zn2+ (c). Electron-dense NPs are located extracellularly as indicated by yellow arrowBack to article page