PL PATH 300 Study Guide - Midterm Guide: Wound Healing, Abscission, Vascular Plant
Document Summary
E. g. cuticle, host cell wall (type ii: grasses, gingers, palms; type i: found. Pathogenesis: some defenses are constitutively (continue to be produced, regardless of the need of the cells) present others are induced (triggered) by the presence of the pathogen. *these are dictated by host and pathogen genes. Constitutive defenses- structural in higher plant species), bark, trichomes. the host. *e. g. fungal cell wall, fatty acids, pathogen proteins. formation, wound healing. Induced defenses- host must recognize pathogen and respond. -elicitors: molecules produced by a pathogen that induce a defense response by e. g. toxins, plant lectins, plant glucanses and chitinases, phytocystatins. Induced defenses structural e. g. papillae, cork, abscission layers, tyloses, gum depositions, cell. Adhesion to plant nonspecific: magnaporthe grisea conidia-tip mucilage ( glue"). Steps to infection: spore germination growth over the leaf appressorium matrix 4. Maturation 5. dispersion formation penetration peg: receptor: a region of tissue, or a molecule in a cell membrane, that responds specifically to a particular hormone, antigen, etc.
