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- W3043755786 abstract "The extensive use of chemical pesticides in agricultural production has caused great damage to the soil and ecological environment. Citral, a monoterpene aldehyde, has been shown to inhibit the growth of a variety of pathogenic fungi by affecting mitochondrial structure. However, the high volatility and chemical instability of citral may restrict its applications in the agricultural industries. In this study, a concise and facile method for the preparation of modified copolymer chitosan/carboxymethyl cellulose (CS/CMC) hydrogels microspheres loaded with citral was developed to increase and stabilize the bioavailability of this natural bioactive substance. Polyelectrolyte composite scaffold hydrogel microspheres were synthesized by polycationic chitosan (CS) and polyanionic carboxymethyl (CMC). Citral was embedded into the microspheres by coupling the carbonyl group of citral with the amino group of CS to form a Schiff base structure. The effects of three parameters including CS/CMC weight ratio, concentration of CMC and citral on the loading ratio were investigated and optimal loading of 68% was achieved based on single-factor experiments. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) were employed to confirm and characterize the structure and surface morphology of the microspheres. Both the XRD and FTIR spectra indicated that the microspheres contain -C=N- covalent bonds between CS and citral. The hydrogel microspheres with incorporated citral exhibited effective and improved in vitro antibacterial effects against E. coli, S. aureus and B. subtilis than non-loaded CS microspheres. Moreover, CS/CMC-citral-MPs showed a good antifungal effect in vivo in reducing disease incidence caused by the plant pathogenic fungus Botrytis cinerea in Solanum lycopersicum. Different from the previous applications of CS and citral in the preservation of picked fruits, citral was embedded into CS/CMC microspheres to achieve improved plant protection against Botrytis cinerea. The microspheres are a promising green antimicrobial agent against plant pathogens in crop protection and other fields." @default.
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- W3043755786 date "2020-12-01" @default.
- W3043755786 modified "2023-10-05" @default.
- W3043755786 title "Citral-loaded chitosan/carboxymethyl cellulose copolymer hydrogel microspheres with improved antimicrobial effects for plant protection" @default.
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- W3043755786 doi "https://doi.org/10.1016/j.ijbiomac.2020.07.164" @default.
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