Silica nanoparticles protect rice against biotic and abiotic stresses

作者：Jianfeng Du, Baoyou Liu, Tianfeng Zhao, Xinning Xu, Han Lin, Yatai Ji, Yue Li, Zhiwei Li, Zhiwei Li, Chongchong Lu, Pengan Li, Haipeng Zhao, Yang Li, Yang Li, Ziyi Yin, Xinhua Ding · 发表于：Journal of Nanobiotechnology · 年份：2022 · DOI：10.1186/s12951-022-01420-x · 被引用次数：157 · 研究领域：Silicon Effects in Agriculture、Aluminum toxicity and tolerance in plants and animals、Coal and Its By-products

Abstract Background By 2050, the world population will increase to 10 billion which urged global demand for food production to double. Plant disease and land drought will make the situation more dire, and safer and environment-friendly materials are thus considered as a new countermeasure. The rice blast fungus, Magnaporthe oryzae , causes one of the most destructive diseases of cultivated rice worldwide that seriously threatens rice production. Unfortunately, traditional breeding nor chemical approaches along control it well. Nowadays, nanotechnology stands as a new weapon against these mounting challenges and silica nanoparticles (SiO 2 NPs) have been considered as potential new safer agrochemicals recently but the systematically studies remain limited, especially in rice. Results Salicylic acid (SA) is a key plant hormone essential for establishing plant resistance to several pathogens and its further affected a special form of induced resistance, the systemic acquired resistance (SAR), which considered as an important aspect of plant innate immunity from the locally induced disease resistance to the whole plant. Here we showed that SiO 2 NPs could stimulate plant immunity to protect rice against M. oryzae through foliar treatment that significantly decreased disease severity by nearly 70% within an appropriate concentration range. Excessive concentration of foliar treatment led to disordered intake and abnormal SA responsive genes expressions which weaken the plant resist...