Abstract
Chitosan is the only cationic polysaccharide in nature. It is a type of renewable resource and is abundant. It has good biocompatibility, biodegradability and biological activity. The amino and hydroxyl groups in its molecules can be modified, which enables chitosan to contain a variety of functional groups, giving it a variety of properties. In recent years, researchers have used different strategies to synthesize a variety of chitosan derivatives with novel structure and unique activity. Structure combination is one of the main strategies. Therefore, we will evaluate the synthesis and agricultural antimicrobial applications of the active chitosan derivatives structure combinations, which have not been well-summarized. In addition, the advantages, challenges and developmental prospects of agricultural antimicrobial chitosan derivatives will be discussed.
Highlights
Chitosan, a natural basic amino polysaccharide prepared by deacetylation of chitin, is composed of β-(1→4)-linked D-glucosamine and N-acetyl-D-glucosamine units [1,2].It mainly exists in the shells of marine animals such as shrimp and crabs and is a renewable marine biological resource with a large reserve [3,4]
The introduction of active groups containing sulfur and phosphorus on hydroxyl or amino groups may significantly improve the biological activity of chitosan derivatives
The results showed that the chitosan thiourea derivatives had obvious inhibitory effects on the tested fungi [30,31]
Summary
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