The molecular mechanisms of silica nanomaterials enhancing the rice (Oryza sativa L.) resistance to planthoppers (Nilaparvata lugens Stal)

Herein, fluorescent silica (F-SiO2) ENMs (50 nm) were synthesized, which could be taken up and translocated from rice root to shoot, promoting the plant growth resistance planthopper compared with Si ion fertilizers under hydroponic conditions. Particularly, upon exposure F-SiO2 (5 mg?L?1) suspension for 9 days, fresh dry weight (FW DW) of length, surface area, tip number increased by 33.58%, 65.22%, 15.26%, 20.26% 29.01%, respectively. Notably, in presence planthopper, shoot FW DW still 61.88% 114.75%, The lignin content (by 30.13%) formation cells stem after mechanical barriers against planthoppers. transcriptome data revealed that upregulate expression genes involved plant-pathogen interactions, hormone signal transduction, glucose metabolism carbon fixation pathway, seedlings. Our findings provide first evidence underlying molecular mechanisms SiO2 enhancing planthopper.