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Bidirectional Uptake, Transfer, and Transport of Dextran-Based Nanoparticles in Plants for Multidimensional Enhancement of Pesticide Utilization

文献类型： 外文期刊

作者： Xiong, Qiuyu 1 ; Liang, Wenlong 1 ; Shang, Wenxuan 1 ; Xie, Zhengang 1 ; Cheng, Jingli 1 ; Yu, Bin 1 ; Fang, Yun 1 ; Sun, Li 2 ; Zhao, Jinhao 1 ;

作者机构： 1.Zhejiang Univ, Key Lab Biol Crop Pathogens & Insects Zhejiang Pro, Key Lab Mol Biol Crop Pathogens & Insects, Minist Agr, Hangzhou 310058, Peoples R China

2.Zhejiang Acad Agr Sci, Hangzhou 310021, Peoples R China

关键词： absorption and translocation; bidirectional uptake; dextran; nanoparticles; tebuconazole; tomato gray mold

期刊名称：SMALL （ 影响因子：13.3； 五年影响因子：13.2 ）

ISSN： 1613-6810

年卷期： 2023 年

页码：

收录情况： SCI

摘要： The development of effective multifunctional nano-delivery approaches for pesticide absorption remains a challenge. Here, a dextran-based pesticide delivery system (MBD) is constructed to deliver tebuconazole for multidimensionally enhancing its effective utilization on tomato plants. Spherical MBD nanoparticles are obtained through two-step esterification of dextran, followed by tebuconazole loading using the Michael addition reaction. Confocal laser scanning microscopy shows that fluorescein isothiocyanate-labeled MBD nanoparticles can be bidirectionally transported in tomato plants and a modified quick, easy, cheap, effective, rugged, and safe-HPLC approach demonstrates the capacity to carry tebuconazole to plant tissues after 24 h of root uptake and foliar spray, respectively. Additionally, MBD nanoparticles could increase the retention of tebuconazole on tomato leaves by up to nearly 2.1 times compared with the tebuconazole technical material by measuring the tebuconazole content retained on the leaves. In vitro antifungal and pot experiments show that MBD nanoparticles improve the inhibitory effect of tebuconazole against botrytis cinerea by 58.4% and the protection against tomato gray molds by 74.9% compared with commercial suspensions. Furthermore, the MBD nanoparticles do not affect the healthy growth of tomato plants. These results underline the potential for the delivery system to provide a strategy for multidimensional enhancement of pesticide efficacy. Spherical nanoparticles obtained from esterified dextran can effectively enhance the bidirectional uptake and transport of pesticides, in addition to augmenting foliar retention and physical stability. They are expected to integrally improve the ability of tebuconazole to control tomato gray molds and provide a new idea for developing sustainable agriculture.image

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