Chitosan oligosaccharides are a series of oligosaccharides with a certain degree of polymerization and a certain structure that are enzymatically hydrolyzed by chitosan. The inhibitory activity of chitosan oligosaccharide is closely related to the polymerization degree and deacetylation degree of chitosan oligosaccharide. Chitosan oligosaccharide with low polymerization degree and high deacetylation degree has high inducement activity.
Chitosan oligosaccharide has significant activity in inducing plant defense responses. Chitosan oligosaccharide can induce the plant’s own immune system, produce broad-spectrum resistance, effectively resist bacterial infection, and at the same time activate plant cells and promote plant growth.