Biology 3218F/G Lecture Notes - Lecture 32: Pentachlorophenol, Stem Rust, Telium
20 Sep 2016
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A lot of this is just common sense thinking about the biology of the org and how the disease works. First it has to get there, so needs a dispersal phase (air-, water-dispersed) to inoculate host. When spore lands on plant, have to recognize if it is a plant pathogen; if penicillium spores lands on tomato plant, nothing happens b/c tomato plant has various chemical defenses/cuticles so fungus doesn"t get in. But if it is a pathogen, the pathogen recognizes the host, and will start growing inwards; so there"s a pathogen detecting host phase that sets up a bunch of things for pathogen to gain entry. But penetration peg will usually go through this, and resistance by plant has failed and pathogen has overcome host resistance. If biotroph, will keep cell alive but grows from cell to cell and form haustoria and takes food out of host cells that way.
