Biopolymers and Bioplastics

This review highlights three widely used biopolymers: alginate, chitosan, and cellulose. Chitosan, a polycationic polymer derived from chitin, has the unique ability to activate defensive responses in plants against pathogens. It is particularly effective against fungal pathogens compared to bacterial ones and is extensively applied in both pre-harvest and post-harvest agricultural treatments to prevent microbial infections.