Reducing pesticide use: Synthesis and application of ROS-SPC as an efficient nanocarrier and scavenger of reactive oxygen species in plants

• Published in: Advanced Agrochem Vol. 3; no. 2; pp. 162 - 170
• Main Authors: Jiang, Tian-shi, Qi, Su-zhen, Zhu, Chang-heng, Zhao, Han-qing, Duan, Liu-sheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2024; KeAi Communications Co., Ltd
• Subjects: Fungicide; Nanocarrier; Nanopesticide; Star polymers; Star polymers; Nanopesticide; Nanocarrier; Fungicide
• ISSN: 2773-2371; 2773-2371
• DOI: 10.1016/j.aac.2024.03.001

There is an increasing need to reduce the use of pesticides to reduce their potential threat to food/environmental safety. At the same time, an increase in reactive oxygen species (ROS) induced by abiotic stresses in plants can lead to an increase in ROS in the plant and affect yield. In this paper, ROS-SPC was synthesised by two reactions and used as an efficient pesticide nanocarrier/adjuvant and scavenger of reactive oxygen species (ROS) in plants. By hydrophobic interaction, ROS-SPC spontaneously conjugated to fluazinam with a pesticide loading capacity (PLC) of 15.1 %. After fluazinam was conjugated to ROS-SPC, the particle size of fluazinam was reduced from 64.70 nm reduced to 19.82 nm, and the contact angle of pesticide droplets on plant leaves was significantly reduced from 59.44° to 26.76°. ROS-SPC as a carrier was tested to inhibit phytopathogenic fungi by 200 % more than conventional delivery methods. In addition, we also learned that ROS-SPC with endocytosis capability can indeed remove reactive oxygen species from plants. Tests using HUVEC cells showed that ROS-SPC has low cytotoxicity within a reasonable range of applications, and ROS-SPC was tested to have low toxicity to pollinating bees. [Display omitted] •ROS-SPC nanocarriers are simple to synthesis. Low toxicity and environmentally friendly.•After loading fluazinam, the fungicidal activity of fluazinam can be greatly improved, and the ROS-SPC nanocarrier can effectively reduce the particle size of the drug, and can reduce the contact angle with strawberry leaves. In order to achieve the purpose of reducing the overuse of pesticides.•At the same time, the ROS-SPC nanocarriers can remove excessive reactive oxygen species from plant leaves to ensure the growth of plants.•It has been tested to be safe, low-toxicity and environmentally friendly.