AuNPs	gold nanoparticles
(+) AuNPs	positively charged gold nanoparticles
(−) AuNPs	negatively charged gold nanoparticles
DZ	differentiation zone
ER	endoplasmic reticulum
EZ	elongation zone
FDA	fluorescein diacetate
HRTEM	high-resolution transmission electron microscope
MS	Murashige and Skoog medium
MZ	meristematic zone
NMs	nanomaterials
NPs	nanoparticles
PEG	polyethylene glycol
PM	plasma membrane
TZ	transition zone