Arnaud Thierry Djami Tchatchou

Research Scientist

Lab Affiliation: Barbara Kunkel

I am a Research Scientist in the Kunkel Lab. I graduated with a PhD (Molecular Biology, 2012) from the University of the Witwatersrand, South Africa and a MSc ( Biochemistry, 2007) from the University of Yaounde 1, Cameroon. My  expertise is in research regarding plant-pathogen interaction with the focus on plant defense response and pathogen virulence mechanism. Before joining the Kunkel Lab, I worked as a post-doctoral fellow (2012-2016) at the University of Johannesburg, the University of the Witwatersrand (2013-2014) and at the University of South Africa (2016-2017). In my current research I am studying the  roles of the plant hormone auxin (indole acetic acid, IAA) during pathogenesis of  bacterial pathogen Pseudomonas syringae pv. tomato strain DC3000 (PtoDC3000),with emphasis on understanding the direct effects of auxin on the pathogen. In this work we demonstrate that PtoDC3000 uses IAA  in  at  least  two  different  ways  to  promote  virulence  and  disease:  1)  as  a  plant  hormone  to suppress  plant  defenses  and  2)  as  a  microbial  signaling  molecule  to  regulate  virulence  gene expression.  This  second  finding  is  novel,  as  we  show  for the first time that auxin is promoting pathogenesis through  a direct  effect on P.  syringae  gene  expression. I am Christian and originally from Cameroon.

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  • Washington University
  • CB 1137
  • One Brookings Drive
  • St. Louis, MO 63130-4899
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