Figure 2. Potential of root system of intact plants to generate silver NPs.

Root system of intact plants of (a) Phyllanthus fraternus, (b) Portulaca grandiflora, (c) Triticum aestivum, (d) Amaranthus gracilis and (e) Vernonia cinerea exhibitingpotential to alter clear colorless AgNO₃ of different concentrations (mM) turbid brown. No color change noted in the tubes containing different concentrations of AgNO₃ incubated under similar conditions without plants (a–d).