MS (Master of Science)
Date of Award
Committee Chair or Co-Chairs
Cecilia A. McIntosh, Ranjan N. Chakraborty
Salicylic acid is a plant hormone that accumulates with plant-pathogen interaction. This accumulation corresponds to the plant being resistant to infection and without it the plant is susceptible. In this study, primers of genes involved in the normal synthesis of SA were used in RT-PCR to compare gene expression levels in susceptible and resistant plants challenged with tobacco mosaic virus. Because SA synthesis shares chorismate as a common substrate with the synthesis of aromatic amino acids, HPLC was used to determine whether the increase in SA could be attributed to a decrease in amino acid levels. The results suggest that genes of the shikimate pathway are up-regulated in both plant lines but much more quickly in the resistant plant, making differential gene expression a possible cause of SA accumulation. Additionally, results showed a more pronounced decrease in amino acid levels in resistant plants compared to susceptible plants.
Thesis - Open Access
Eddo, Alexander, "Characterization of the Pathway Leading to the Synthesis of Salicylic Acid in Plants Resisting Pathogen Infection." (2008). Electronic Theses and Dissertations. Paper 1958. http://dc.etsu.edu/etd/1958
Copyright by the authors.