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Table 3 Content of Ag, Au, Pt (ppb in extracts) in oakleaf lettuce seedlings depending on engineered nanoparticles (nano-metals; M-NPs) applied on the leaves in different concentrations as aqueous colloidal solutions. Control plants were sprayed with deionized water

From: Impact of foliar application of some metal nanoparticles on antioxidant system in oakleaf lettuce seedlings

M-NPs and concentration

Elements content

 

Ag

Control

0.007 ± 0.003

Ag

20 ppm

0.799 ± 0.182 *

Ag

40 ppm

0.966 ± 0.124 *

 

Au

Control

0.022 ± 0.005

Au

10 ppm

0.428 ± 0.127 *

Au

20 ppm

0.508 ± 0.044 *

 

Pt

Control

0.001 ± 0.000

Pt

20 ppm

0.070 ± 0.016 *

Pt

40 ppm

0.095 ± 0.025 *

  1. *Denotes significant differences (p ≤ 0.05) between particular nanometal and unexposed control, means for concentration of given nanometal with no letters are not significantly different are significantly different at p ≤ 0.05, comparisons were performed by Fisher’s LSD test. Each value represents the mean ± SD