Class Notes (835,470)
Canada (509,192)
CSB353H1 (12)
all (1)

CSB Sept 8.docx

4 Pages
Unlock Document

Cell and Systems Biology
All Professors

CSB452H1FSeptember 9 2013Note the changes to syllabusthere are two exams only one for first half of semesters content one for last half of semesters content NONCUMULATIVEPathogenic lifestyles of microbes and plantsplants and animals have similar commonalities in terms of immune response to pathogens Arms race between the host and the microbe to try to gain the upper hand in the interactionwhen it deems it to be a threatdo not want to be responding to all microbes since it wastes nutrientswant to respond to pathogenic microbes only Plant microbe interactions have dire consequencesaffecting food supply for instancethe potato famine in Ireland in mid1800s Caused emigration to North America In developing countries reduction in major food sources can have devastating effects As world population continues to increase farmers and plant biologists must find more effective ways to grow food whether meat or vegetables What factors are important in outcomes of interactions Can have symbiotic interactions but focusing on pathogenic interactions Agrobacterium tumefaciensthose cells that have DNA injectedgrow tumours due to growth factor injectedbut plant can still survive Biotroph is pathogen that lives on living plant tissue Grapes infected by fungal pathogen botrytisnecrotroph kills off plant tissue lives off dying tissue Enrichment of sugar in these infected grapeslead to delicious wines Pseudomonas syringaeinfects broad range of plants Hemibiotrophboth biotroph and necrotophlives on living tissue then kills off tissue to complete life cycle Symbiotic interactionsrhizobium bacteriafix nitrogen from the atmostphereneed rhizobium for plants to grow How does a microbe persuade a plant that it wants a symbiotic relationship Arabidopsismuch researched Interaction with syringae much researchedfocus of course Pathovarsrestricted in host range Virulence proteins on specific host plants Zigzag model of plant immunityhow it evolvedArms race between plant and microbe Recognition of pathogenassociated molecular patterns Conserved molecules on surface of microbesneed to recognize these patterns in order to detect potentially invading microbe If spray heatinactivated ecoli on plant induce PTIEvolution of pathogen effectors is nextif a microbe wants to be successful at infecting a plant must overcome the shields of plant Broad range of effector molecules What these effectors are doing is blocking PAMP triggered immunity Once PAMP triggered immunity is blockedpathogen can growhave many examples of pathogen effectors that can block PAMP immunityblock first level of basal immunity in plants
More Less

Related notes for CSB353H1

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.