Improvement of leaf K+ retention is a shared mechanism behind CeO2 and Mn3O4 nanoparticles improved rapeseed salt tolerance

Abstract Salinity is a global issue limiting efficient agricultural production. Nanobiotechnology has been emerged as an effective approach to improve plant salt tolerance. However, little known about the shared mechanisms between different nanomaterials-enabled In this study, we found that both PNC [polyacrylic acid coated nanoceria (CeO 2 nanoparticles)] and PMO (polyacrylic Mn 3 O 4 nanoparticles) nanozymes improved rapeseed treated plants showed significantly fresh weight, dry higher chlorophyll content, Fv/Fm, carbon assimilation rate than control under stress. Results from confocal imaging with reactive oxygen species (ROS) fluorescent dye histochemical staining experiments ROS over-accumulation level in was lower Confocal results K + cytosolic vacuolar signals were observed This further confirmed by leaf content data. Furthermore, Na While, compared plants, These are supported qPCR of genes transport. Overall, our suggest besides maintaining homeostasis, improvement retention could be mechanism nano-improved