Pectin-Coated Iron-Based Metal–Organic Framework Nanoparticles for Enhanced Foliar Adhesion and Targeted Delivery of Fungicides

Abstract

Conventional agrochemicals are underutilized due to their large particle sizes, poor foliar retention rates, and difficult translocation in plants, and the development of functional nanodelivery carriers with high adhesion to the plant body surface and efficient uptake and translocation in plants remains challenging. In this study, a nanodelivery system based on a pectin-encapsulated iron-based MOF

Smart controlled-release nanopesticides based on metal–organic frameworks

“…87 TF@MIL-101(Fe III )@PT showed better in vitro fungicidal activity against R. solani than TF SC and had more effective control effect in the greenhouse than TF SC. 87 TF@MIL-101(Fe III )@PT also reduced the inhibition of rice seedling stem length and root length by TF SC and promoted seedling growth. 87…”

“…87 The fluorescently labelled TF@MIL-101(Fe III )@PT NPs showed excellent bottom-up (from roots to stems and then to leaves) and top-down (from leaves to stems and then to roots) bidirectional translocation through vascular bundles in rice plants. 87 TF@MIL-101(Fe III )@PT showed better in vitro fungicidal activity against R. solani than TF SC and had more effective control effect in the greenhouse than TF SC. 87 TF@MIL-101(Fe III )@PT also reduced the inhibition of rice seedling stem length and root length by TF SC and promoted seedling growth.…”

“…The average size of TF@MIL-101(Fe III )@PT was 126 nm, and the loading capacity of TF in TF@MIL-101(Fe III )@PT was 27.4%. 87 TF@MIL-101(Fe III )@PT showed H 2 O 2 - and pectinase-responsive controlled TF release. 87 The fluorescently labelled TF@MIL-101(Fe III )@PT NPs showed excellent bottom-up (from roots to stems and then to leaves) and top-down (from leaves to stems and then to roots) bidirectional translocation through vascular bundles in rice plants.…”

“…87 TF@MIL-101(Fe III )@PT showed H 2 O 2 - and pectinase-responsive controlled TF release. 87 The fluorescently labelled TF@MIL-101(Fe III )@PT NPs showed excellent bottom-up (from roots to stems and then to leaves) and top-down (from leaves to stems and then to roots) bidirectional translocation through vascular bundles in rice plants. 87 TF@MIL-101(Fe III )@PT showed better in vitro fungicidal activity against R. solani than TF SC and had more effective control effect in the greenhouse than TF SC.…”

“…At the beginning of 2024, Zhang, Xu, and co-workers reported thifluzamide (TF)-loaded MIL-101(Fe III ) nanopesticides coated with PT via amide linkages, denoted as TF@MIL-101(Fe III )@PT, to enhance the utilization of TF in rice plants by taking advantage of the PT affinity for plant cell walls (Scheme 8). 87 TF (Scheme 3) is a broad-spectrum fungicide that is widely used to control pathogenic fungi such as Rhizoctonia , Ustilago , and Tilletia . The average size of TF@MIL-101(Fe III )@PT was 126 nm, and the loading capacity of TF in TF@MIL-101(Fe III )@PT was 27.4%.…”