Silica nanoparticles conferring resistance to bacterial wilt in peanut (Arachis hypogaea L.)

Hollow Mesoporous Silica Nanoparticles as a New Nanoscale Resistance Inducer for Fusarium Wilt Control: Size Effects and Mechanism of Action

“…Hydrodynamic diameters and zeta potentials of the three HMSNs were also measured, with results showing larger sizes compared with the TEM data and negative surface potentials (Table S1), consistent with previously reported results [7,9,10]. Characters of narrow particle size distributions of the three HMSNs (12-28, 70-125, and 350-455 nm, respectively), and their overall wide range scale (12-455 nm) that covers the existing application scope of SiO 2 NPs for plant disease control [7,9,10,12,15,[20][21][22]28], make them desirable materials to elucidate the size effects of HMSNs for Fusarium wilt control.…”

“…specific plants at a single diameter scale range [7,12,[20][21][22]. It still remains unclear whether HMSNs can induce disease resistance in crop plants, and whether their performances are related to the diameter scales and SAR induction.…”

“…SiO 2 NPs have many unique characteristics such as an adjustable pore structure, easy modification, simple synthesis, low cost, and less environmental harm [17]. Unlike other nanoparticles which exert their antimicrobial activities mainly by directly acting on the target pathogens, SiO 2 NPs exhibit diverse roles as an antimicrobial agent by directly restraining the virulence of plant pathogens [15,18,19], boosting plant innate immunity to alleviate pathogen damage [7,12,[20][21][22], or delivering pesticides to enhance their efficacy [23]. Recently, as a controlled-release pool of bioavailable silicon (orthosilicic acid), SiO 2 NPs are beginning to attract significant attention as a new resistance inducer that can enhance disease resistance without negative effects on the crop growth and yield [7,9,12,[20][21][22].…”

“…Unlike other nanoparticles which exert their antimicrobial activities mainly by directly acting on the target pathogens, SiO 2 NPs exhibit diverse roles as an antimicrobial agent by directly restraining the virulence of plant pathogens [15,18,19], boosting plant innate immunity to alleviate pathogen damage [7,12,[20][21][22], or delivering pesticides to enhance their efficacy [23]. Recently, as a controlled-release pool of bioavailable silicon (orthosilicic acid), SiO 2 NPs are beginning to attract significant attention as a new resistance inducer that can enhance disease resistance without negative effects on the crop growth and yield [7,9,12,[20][21][22]. El-Shetehy et al (2021) described the potential of SiO 2 NPs in enhancing the disease resistance of Arabidopsis thaliana against Pseudomonas syringae via the SA-dependent SAR pathway similar to conventional Si products [7].…”

“…Hollow mesoporous silica nanoparticles (HMSNs), a unique class of SiO 2 NPs with large hollow cavities and intact porous shells, have been accepted as desirable carriers for controlled pesticide delivery due to their robust and low-cost synthesis with tunable physicochemical properties and high loading capacity [25][26][27]. Previous studies have provided insights into the roles of solid core SiO 2 NPs in enhancing the disease resistance of several specific plants at a single diameter scale range [7,12,[20][21][22]. It still remains unclear whether HMSNs can induce disease resistance in crop plants, and whether their performances are related to the diameter scales and SAR induction.…”