Location: Molecular Plant Pathology
Project Number: 8042-22000-276-00
Start Date: Mar 25, 2012
End Date: Mar 24, 2017
This project seeks to elucidate specific signaling mechanisms that are involved in plant disease resistance. Plants respond to biotic stress by the integration of responses located in two different cellular compartments, the symplast and the apoplast. Improvement of existing resistance to plant disease requires a more comprehensive understanding of key apoplastic and symplastic responses to pathogen invasion and how they are integrated. In the apoplast, we will examine the complex interplay between secondary metabolites and redox signaling that controls early events in bacterial and viroid pathogenesis as well as other responses triggered by long distance signaling. In the symplast, we will examine the molecular interactions between viroids and their hosts to determine how these small RNA molecules replicate and move between organelles within a single cell or over long distances between cells. The long-term objective of this multidisciplinary project is to understand the role of plant-pathogen signaling in disease resistance in sufficient detail that novel strategies can be developed to render plants resistant/immune to pathogen infection. In the intermediate term, we will test the ability of certain viroid-derived targeting signals to redirect mRNAs to the chloroplast, thereby adding novel biosynthetic capabilities to chloroplast metabolism with the need for chloroplast genome transformation.