SIZE-DEPENDENT EFFECTS OF ZNO AND FE₂O₃ NANOPRIMING ON GERMINATION DYNAMICS AND SYNCHRONY IN SUNFLOWER (HELIANTHUS ANNUUS L.)
EFECTELE DEPENDENTE DE DIMENSIUNE ALE TRATAMENTULUI CU NANOPARTICULE DE ZNO ȘI FE₂O₃ ASUPRA DINAMICII ȘI SINCRONIZĂRII GERMINĂRII LA FLOAREA-SOARELUI (HELIANTHUS ANNUUS L.)
DOI : https://doi.org/10.35633/inmateh-77-119
Authors
Abstract
Nanopriming enhances seed germination and early vigor by delivering micronutrients at the nanoscale level. This study evaluated the size-dependent effects of ZnO (7 nm, 100 nm) and Fe₂O₃ (4.5 nm, 16.7 nm) nanoparticles (NPs) on sunflower (Helianthus annuus L.) germination dynamics. Seeds were primed with 10–100 µg/mL NPs, and germination was assessed through mean germination time (MGT), germination speed index (GSI), and synchrony (CV). NP type and size, but not concentration, significantly affected MGT and GSI. ZnO 7 nm enhanced speed and uniformity, while Fe₂O₃ 4.5 nm delayed and desynchronized germination. These results show that nanoparticle physicochemical properties critically modulate germination, highlighting ZnO nanopriming for improved seedling emergence.
Abstract in Romanian



