Biology 20B- May 26

Biology 20B- May 26 - May 26 Lecture Biology 20B - Live...

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May 26 Lecture Biology 20B - Live cell infected with fungal hypha o Cell dies and kills fungus o Called hypersensitive response o Kamikazi cells Mechanisms for plant response: - –phytoalexins- small molecules, broadly toxic to microbes o most are flavanoids - pathogenesis related proteins (PR proteins) o [book info here] - Both are part of the HR (Hypersensitive Response) and the SAR (systemic acquired response) Systemic Aquired Resistance - full body response - salicylic acid extends the hypersensitive response throughout plant - triggers PR proteins for protection Gene-For-Gene Resistance - gene of plant and gene of pathogen - virulent- ability of a microbe to infect - resistance gene produce receptor - anti-virulent genes makes product that a plant resistance gene receptor can recognize - both Avr and R genes are dominate - for a pathogen to have resistance to a plant… o plant has recessive gene o pathogen has recessive gene Evolutionary Arms Race Plant Microbe 1. start with: (non-dominate and dominate)
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This note was uploaded on 09/15/2009 for the course BIOE 20B taught by Professor Williams during the Spring '09 term at UCSC.

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Biology 20B- May 26 - May 26 Lecture Biology 20B - Live...

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