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Roy Navarre

Research Geneticist
USDA ARS/ Adjunct Professor

Roy Navarre
Irrigated Agriculture Research and Extension Center, Prosser

Tel.: (509)786-9261
Fax: (509)786-9277

Research Specialty and Interests

The two major interests of our group are the molecular and biochemical basis of potato disease resistance and the nutritional enhancement of potatoes, which are the 4th largest crop in the world and a staple food.  Our interests including systemic acquired resistance and salicylic acid-mediate signaling, along with analysis of the role of plant small molecules in pathogen and pest interactions. For example, trying to identify compounds in potato root exudate that stimulate hatching of the potato cyst nematode.  Historically, relatively little effort has been directed towards enhancing the nutritional value of any crop, but advances of the last decade greatly facilitate such a goal. We are using diverse approaches towards maximizing the nutritional values of potatoes, including metabolic engineering of the folate and phenolic pathways, LCMS profiling of tuber phytonutrients in diverse germplasm and working with potato breeders using genetic approaches.


  • Postdoctoral Training – Waksman Institute, Rutgers University.
  • Ph.D.- Department of Botany and Plant Pathology,  Oregon State University ,
  • M.Sc.- Department of Plant Pathology and Crop Physiology, Louisiana State University,
  • B.Sc. – Department of Microbiology, Louisiana State University

Selected Publications

  • Goyer, A., and D.A. Navarre. 2008. Folate is Higher in Developmentally Younger Potato Tubers. J. Sci Food Agric. IN PRESS
  • Roshani, S and Navarre, DA. 2008. LC-MS analysis of solanidane glycoalkaloid diversity among four wild potato species and three cultivars.  J. Agric Food Chem.  56:6949-58.
  • Navarre, DA., Shakya, R., Holden, J., and Crosslin, J. 2008. LC-MS Analysis of Phenolic Compounds in Tubers Showing Zebra Chip Symptoms.  Amer. J. Pot. Res. IN PRESS
  • Kishor K. Bhattarai, Qi-Guang Xie, Usha Bishnoi, Thomas Girke, D. A. Navarre and Isgouhi Kaloshian. 2008. Transcriptome Profiling Implicates Jasmonic Acid-Dependent Signaling in Basal Defense During Root-Knot Nematode/Tomato Interactions. MPMI. IN PRESS.
  • Caius M Rommens, Craig M Richael, Duroy A. Navarre, Jingsong Ye, Yumei Zhang, Kathy Swords, and Michele Krucker. 2008. Engineered Native Pathways for High Kaempferol and Caffeoylquinate Production in Potato. Plant Biotechnol J. IN PRESS.
  • Kachroo A, Fu DQ, Havens W, Navarre D, Kachroo P, Ghabrial SA. 2008. An oleic acid-mediated pathway induces  defense signaling and enhanced resistance to multiple pathogens in soybean. MPMI 21(5):564-75.
  • Chanda B, Venugopal SC, Kulshrestha S, Navarre DA, Downie B, Vaillancourt L, Kachroo A, Kachroo P. 2008. Glycerol-3-Phosphate Levels Are Associated with Basal Resistance to the Hemibiotrophic Fungus Colletotrichum higginsianum in Arabidopsis. Plant Physiol. 147(4):2017-29.
  • J, Van Eck, B. Conlin, D. F. Garvin, H. Mason, D. A.  Navarre, and C. R. Brown. 2007. Enhancing beta-carotene content in potato by RNAi-mediated  silencing of the b-carotene hydroxylase gene. American Journal of Potato Research 84:4331-342.
  • Goyer, A., and D.A. Navarre. 2007. Determination of folate concentrations in diverse potato germplasm using a trienzyme extraction and a microbiological assay. J Agric Food Chem 55:3523-8.
  • Moeder, W., O. Del Pozo, D.A. Navarre, G.B. Martin, and D.F. Klessig. 2007. Aconitase plays a role in regulating resistance to oxidative stress and cell death in Arabidopsis and Nicotiana benthamiana. Plant Mol Biol 63:273-87.
  • Roshani, S and Navarre, DA. 2006 Rapid Screening of Ascorbic Acid, Glycoalkaloids, and Phenolics in Potato Using High-Performance Liquid Chromatography. J. Agric Food Chem. 2006, 54, 5253-5260
  • Collins, H.P., D.A. Navarre, E. Riga, F.J. Pierce.  2006.  Effect of foliar applied plant elicitors on microbial and nematode populations in the root zone of potato.  Comm. Soil Sci. Plant Anal.  37:1747-1759
  • Chandra-Shekara, A. C.; Gupte, M.; Navarre, D.; Raina, S.; Raina, R.; Klessig, D.; Kachroo, P. Light-dependent hypersensitive response and resistance signaling against Turnip Crinkle Virus in Arabidopsis. Plant J. 2006, 45, 320-334.
  • Li, Q.; Xie, Q. G.; Smith-Becker, J.; Navarre, D. A.; Kaloshian, I. Mi-1-Mediated aphid resistance involves salicylic acid and mitogen-activated protein kinase signaling cascades. MPMI. 2006, 19, 655-664.
  • M. Chern, H.A. Fitzgerald, P.E. Canlas, D.A. Navarre, P.C. Ronald, 2005. Overexpression of a rice NPR1 homolog leads to constitutive activation of defense response and hypersensitivity to light Mol Plant Microbe Interact 18:51-520.
  • Kachroo, P., Venugopal, SC.; Navarre, DA., Lapchyk, L.; Kachroo, A. 2005. Role of salicylic acid and fatty acid desaturation pathways in ssi2-mediated signaling. Plant Physiol. v. 139, no. 4, 1717-1735.
  • Ve. Hu G, deHart AK, Li Y, Ustach C, Handley V, Navarre R, Hwang CF, Aegerter BJ, Williamson VM, Baker B. EDS1 in tomato is required for resistance mediated by TIR-class R genes and the receptor-like R gene. 2005. Plant J.  42(3):376-91.
  • Navarre, DA and Mayo, D. 2004. Differential characteristics of salicylic acid-mediated signaling in potato. Physiological Molecular Plant Pathology 64:179-188
  • A.C. Chandra-Shekara, Duroy Navarre, Aardra Kachroo, Hong-Gu Kang, Daniel Klessig, Pradeep Kachroo 2004. Signaling requirements and role of salicylic acid in HRT- and rrt-mediated resistance to turnip crinkle virus in Arabidopsis The Plant Journal  40(5):646-659
  • Fitzgerald H.A., Chern, M.S., Navarre. R., Ronald, P.C. 2004. Overexpression of (At)NPR1 in rice leads to a BTH- and environment-induced lesion-mimic/cell death phenotype. Molecular Plant-Microbe Interactions. 17(2):140-51.
  • Branch C, Hwang CF, Navarre DA, Williamson VM. 2004. Salicylic acid is part of          the Mi-1-mediated defense response to root-knot nematode in tomato. MPMI. 17(4):351-6.
  • Slaymaker, D., Navarre, DA., Clark, D, Olga del Pozo, Gregory B. Martin and Klessig, D.F.,  2002 The tobacco salicylic acid-binding protein 3 (SABP3) is the chloroplast carbonic anhydrase, which exhibits antioxidant activity and plays a role in the hypersensitive defense response. Proc. Natl. Acad. Sci. (USA) 99:11640-11645.
  • Navarre, D.A., Brown, C., Thomas, P., and Kachroo P., 2003. Systemic Acquired Resistance in Potato. Acta Horticulurae 619:177-181
  • Navarre DA, Wendehenne D, Durner J, Noad R, Klessig DF.  2000. Nitric oxide modulates the activity of tobacco aconitase. Plant Physiology 22(2):573-82.
  • Clark, D, Durner, J, Navarre, DA, and Klessig, DF  2000. Nitric Oxide inhibition of tobacco catalase and Ascorbate peroxidase MPMI  13:1380-1384.
  • Klessig DF, Durner J, Noad R, Navarre DA, Wendehenne D, Kumar D, Zhou JM, Shah J, Zhang S, Kachroo P, Trifa Y, Pontier D, Lam E, Silva H.  2000. Nitric oxide and salicylic acid signaling in plant defense. Proc. Natl. Acad. Sci. (USA) 97(16):8849-55.
  • Navarre, DA and Wolpert TJ.  1999.  Mediation of Oat Response to victorin by light intensity and carbon dioxide concentration. Physiological and Molecular Plant Pathology, 55: 237-242.
  • Navarre, D.A. and Wolpert, T.J.  1998. Victorin induction of an apoptosis/senescence-like response in oats. Plant Cell 11:237-49.
  • Navarre, DA and Wolpert TJ.  1995. Inhibition of the glycine decarboxylase multienzyme complex by the host-selective toxin victorin. Plant Cell 1995 7:463-71.
  • Wolpert, TJ, Navarre, DA, Lorang, JM and Moore, DL  1995. Molecular interactions of victorin and oats. Can J.  Bot.. 73:S475-S482.
  • Wolpert TJ, Navarre DA, Moore, DL and Macko V. 1994.  Identification of the 100-kD victorin binding protein from oats. Plant Cell 6:1145-55.