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Analyses of Host Specificity, Immune Interactions and New Virulence Candidates of Pseudomonas syringae

We studied the host specificity, interactions with plant immune systems, and virulence factors of the phytopathogenic Type III secretion system-carrying bacterium Pseudomonas syringae. In studying host specificity, we ran growth and pod assays using seventeen pathovars of P. syringae on kidney bean hosts. We tracked bacterial growth numbers over six days and compared pathovar growth patterns. To study immune interactions with host plants, we performed effector-triggered immunity induction and suppression assays with individual effectors in Arabidopsis thaliana to determine whether effector evolutionary age was related to
resultant plant immune responses. No correlations were observed. To generate candidate virulence effectors, we sequenced mRNA from seven P. syringae pathovars grown in inducing media and pulled out hits to virulence-related genes.

Identiferoai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/17220
Date26 February 2009
CreatorsSanina, Natali
ContributorsGuttman, David S.
Source SetsUniversity of Toronto
Languageen_ca
Detected LanguageEnglish
TypeThesis
Format4231850 bytes, application/pdf

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