PBIO 4000 Lecture Notes - Lecture 3: Pattern Recognition Receptor, Adaptive Immune System, Innate Immune System
12 Apr 2016
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Conserved because they have a particular important function for those groups of microorganisms. Way for plants to recognize the cell nearby is a microbial cell rather than a plant cell. Identification molecules conserved across microbes or pathogens: fungi, microbes, etc. Not easily changeable by the microorganism because of important function. Components of fungal cell wall indispensable function: ergosterol. Relatively unique to fungi: small lipid-binding proteins (also called elicitins) Specific compounds secreted by oomycetes (not true fungi), ability to attack the plant. In between & around the cell walls of gram-negative bacteria. Bacteria have lipopolysaccharides while plant do not have lipopolysaccharides: harpin. Create pores in membranes in plant cells. Initially, bacteria are living outside the plant cell & by secreting harpin, creates pores in plant cells, loses nutrients & bacteria can use that as a nutrient source. Activates/triggers a defense response from the plant. Pti is not a very strong defense response, but it is a broad response.
