Potential of isolated thylakoids/chloroplasts of <i>Spinacia oleracea</i> to generate Au-nanoparticles in presence of light and dark when suspended in Au³⁺ solutions (0, 0.5, 1 and 2 mM).

<p>(A) Color of Au³⁺ solutions in dark (D) and light (L); (B) and (C) absorption spectra; (D) absorbance at 545 nm of Au³⁺ solutions incubated in dark and light, respectively. Values represent mean of data collected from six independent experiments. Values designated by different small letters are significantly different at P≤0.05 (Duncan's multiple range test).