Plant Pathology, Diseases and Immune System

Physical Mechanism

Some of the physical barriers are maintained by the plant to prevent pathogenic attacks. This barrier includes plant cuticle, cell wall composed of (cellulose, lignin, and suberin), and antimicrobial defense chemicals like hydrogen peroxide, phytoalexins, and genistein. Antimicrobial peptides bind with the receptors of the pathogen and thus help from the microbial attack. Antimicrobial enzymes like chitinases or beta glucanases also help in the defense of plants.