Figure 6: Assessment of in vivo interactions of ZnO-NPs, ZnO-Bulk and Zn2+ ions with A. cepa chemical constituents by FTIR analysis.

FTIR spectra of dry root tip powder obtained from untreated roots and those treated under hydroponic conditions in ddw for 12 h, are shown as (a) untreated control, and (b–d) as roots grown in presence of 100 μg/ml of ZnO-Bulk, ZnO-NPs and Zn2+ ions, respectively.