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- Title
An Effective and Promising Strategy for Plant Protection: Synthesis of L -Carvone-Based Thiazolinone–Hydrazone/Nanochitosan Complexes with Antifungal Activity and Sustained Releasing Performance.
- Authors
Li, Baoyu; Duan, Wengui; Lin, Guishan; Ma, Xianli; Wen, Rongzhu; Zhang, Zhaolei
- Abstract
The development of novel natural product-derived nano-pesticide systems with loading capacity and sustained releasing performance of bioactive compounds is considered an effective and promising plant protection strategy. In this work, 25 L-carvone-based thiazolinone–hydrazone compounds 4a~4y were synthesized by the multi-step modification of L-carvone and structurally confirmed. Compound 4h was found to show favorable and broad-spectrum antifungal activity through the in vitro antifungal activity evaluation of compounds 4a~4y against eight phytopathogenic fungi. Thus, it could serve as a leading compound for new antifungal agents in agriculture. Moreover, the L-carvone-based nanochitosan carrier 7 bearing the 1,3,4-thiadiazole-amide group was rationally designed for the loading and sustained releasing applications of compound 4h, synthesized, and characterized. It was proven that carrier 7 had good thermal stability below 200 °C, dispersed well in the aqueous phase to form numerous nanoparticles with a size of~20 nm, and exhibited an unconsolidated and multi-aperture micro-structure. Finally, L-carvone-based thiazolinone–hydrazone/nanochitosan complexes were fabricated and investigated for their sustained releasing behaviors. Among them, complex 7/4h-2 with a well-distributed, compact, and columnar micro-structure displayed the highest encapsulation efficiency and desirable sustained releasing property for compound 4h and thus showed great potential as an antifungal nano-pesticide for further studies.
- Subjects
PLANT protection; ANTIFUNGAL agents; NANOPARTICLE size; THIADIAZOLES; MICROSTRUCTURE; THERMAL stability; PHYTOPATHOGENIC fungi; BIOACTIVE compounds
- Publication
International Journal of Molecular Sciences, 2024, Vol 25, Issue 9, p4595
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms25094595