6. Research on the mechanism of nano-silica in enhancing stress resistance of rice and apples


Foliar spraying of 100 mg/L nano-silica and root irrigation of 3000 mg/L nano-silica can significantly activate the rice immune system and enhance resistance to rice blast. Among them, root irrigation of 3000 mg/L nano-silica Silicon has the best effect. Foliar spraying of 100 mg/L nano-silica requires less dosage and the lowest cost. Increase the silicon content in rice leaves and roots and promote SA-dependent resistance in rice. Root irrigation with nano-silica can promote rice root development and effectively improve the ability to withstand drought. Nano-silica enhances the effect of Ca(NO)2 on improving the physiological indicators of apple leaves, promotes the absorption of calcium ions by apples, reduces the incidence of bitter pox during the harvest and storage periods, and improves the calcium signaling pathway. Calmodulin activity and gene expression. Therefore, the use of nanosilica is a potential, effective, and safe strategy to protect crops from some biotic and abiotic stresses.