Phytotoxicity of Silver Nanoparticles with Different Surface Properties on Monocots and Dicots Model Plants

Abstract The aim of the research was to evaluate effect three types silver nanoparticles (AgNPs) with different physicochemical properties and ions delivered in form nitrate (AgNO 3 ) at concentration 50 mg L −1 on germination initial growth monocots (common wheat, sorghum) dicots (garden cress, white mustard). AgNPs were prepared using trisodium citrate (TCSB-AgNPs), tannic acid (TA-AgNPs), cysteamine hydrochloride (CHSB-AgNPs). They exhibited comparable shape, size distribution, an average equal 15 ± nm which confirmed use transmission electron microscopy. electrokinetic characteristics revealed that CHSB-AgNPs have positive, whereas TCSB-AgNPs TA-AgNPs negative surface charge. First, toxicity compounds assessed Phytotestkit test. Next, after transferring seedlings pots, shoot length, leaf surface, dry mass, electrolyte leakage measurement, photosystem II (PSII) efficiency determined. AgNO reduced root shoots length common sorghum, garden cress; leaves cress mustard; mass mustard. positively charged showed greatest inhibition effect. Moreover, more toxic PSII model plants than negatively TA-AgNPs. impact differed case dicots, but changes not significant, so it concerned individual parameters. results interaction strength, generally similar all tested plants, i.e., increasing sequence < CHSB-AgNPs.