Different Pathogens Causing diseases

How the pathogen attacks plant Mechanical forces Chemical weapons Enzymes Microbial toxics

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Defence Stratagies Pre existing Structural defenses  Wax and cuticle  Epidermal layer  Hydathodes  Lenticles Pre existing Biochemical defenses  Release of anti microbial compounds  Inhibitors present in the plant cells  Lack of essential factors

Induced Structural defence Lignification Suberization Abscission layers Tyloses Gum deposition Induced biochemical defence Toxic substance Role of phenolic compounds Role of phytoalexins Inactivation of enzymes