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Joyce E. Loper

Joyce Loper

Professor; Associate Dean, College of Agricultural Sciences
Ph.D., 1983, University of California, Berkeley
loperj@science.oregonstate.edu

Faculty of Center for Genome Research and Biocomputing

Office/Lab: 430D Strand
Phone:541-737-1097

 

Publications

Quecine, M.C., Kidarsa, T.A., Goebel, N.C., Shaffer, B.T., Henkels, M.D., Zabriskie, T.M., and Loper, J.E. 2016. An Interspecies signaling system mediated by fusaric acid has parallel effects on antifungal metabolite production by Pseudomonas protegens Pf-5 and antibiosis of Fusarium spp. Applied & Environmental Microbiology 82: 1372-1382.

Araújo, W.L., Creason, A., L., Emy T. Mano, E.T., Neves, A.A.C., Minami, S.N., Chang, J.H., and Loper, J.E. 2016.  Genome sequencing and transposon mutagenesis of Burkholderia seminalis strain TC3.4.2R3 identify genes contributing to suppression of orchid necrosis caused by Burkholderia gladioli. Molecular Plant Microbe Interactions 29:435-446.

Lim, C. K., A. Penesyan, K. A. Hassan, J. E. Loper and I. T. Paulsen 2016. "Disruption of transporters affiliated with enantio-pyochelin biosynthesis gene cluster of Pseudomonas protegens Pf-5 has pleiotropic effects." PLoS ONE 11(7): e0159884.

Loper, J. E., M. D. Henkels, L. I. Rangel, M. H. Olcott, F. L. Walker, K. L. Bond, T. A. Kidarsa, C. N. Hesse, B. Sneh, V. O. Stockwell and B. J. Taylor 2016. "Rhizoxin analogs, orfamide A and chitinase production contribute to the toxicity of Pseudomonas protegens strain Pf-5 to Drosophila melanogaster." Environmental Microbiology doi: 10.1111/1462-2920.13369.

Song, C., T. A. Kidarsa, J. E. van de Mortel, J. E. Loper and J. M. Raaijmakers 2016. "Living on the edge: Emergence of spontaneous gac mutations in Pseudomonas protegens during swarming motility." Environmental Microbiology doi: 10.1111/1462-2920.13288

Yan, Q., B. Philmus, C. Hesse, M. Kohen, J. H. Chang and J. Loper 2016. "The rare codon AGA is involved in regulation of pyoluteorin biosynthesis in Pseudomonas protegens Pf-5." Frontiers in Microbiology 7: 497.

Clifford, J.C., Buchanan, A., Vining, O., Kidarsa, T.A., Chang, J.H., McPhail, K.L., and Loper, J.E. 2015. Phloroglucinol functions as an intracellular and intercellular chemical messenger influencing gene expression in Pseudomonas protegens. Environ. Microbiol. doi: 10.1111/1462-2920.13043

Philmus, B.J., Shaffer, B.T., Kidarsa, T.A., Yan, Q., Raaijmakers, J.M., Begley, T.P., and Loper, J.E. 2015. Investigations into the biosynthesis, regulation and self-resistance of toxoflavin in Pseudomonas protegens Pf-5. ChemBioChem 16:1782-1790.

Song, C., van der Voort, M., van de Mortel, J., Hassan, K.A., Elbourne, L.D., Paulsen, I.T., Loper, J.E., and Raaijmakers, J.M. 2015. The Rsm regulon of plant growth-promoting Pseudomonas fluorescens SS101: Role of small RNAs in regulation of lipopeptide biosynthesis. Microbial Biotechnology 8:296-310.

Creason, A.L., Vandeputte, O.M., Savory, E.A., Davis, E.W., II, Putnam, M.L., Hu, E., Swader-Hines, D., Mol, A., Baucher, M., Prinsen, E., Zdanowska, M., Givan, S.A., Jaziri, M.E., Loper, J.E., Mahmud, T., and Chang, J.H. 2014. Analysis of genome sequences from plant pathogenic Rhodococcus reveals genetic novelties in virulence loci. PLoS ONE 9:e101996.

Henkels, M.D., Kidarsa, T. A., Shaffer, B. T., Goebel,  N. C., Burlinson, P.,  Mavrodi, D. V., Bentley, M. A., Rangel,  L. I., Davis II, E. W., Thomashow, L. S., Zabriskie, T. M., Preston, G. M., and Loper, J. E. 2014.  Pseudomonas protegens Pf-5 causes discoloration and pitting of mushroom caps due to the production of antifungal metabolites.  Molec. Plant-Microbe Interact. 27:733-746.

Stockwell, V.O., Davis, E.W. 2nd, Carey, A., Shaffer, B.T., Mavrodi, D.V., Hassan, K.A., Hockett, K., Thomashow, L.S., Paulsen, I.T., and Loper, J.E. 2013.  pA506: A conjugative plasmid of the plant epiphyte Pseudomonas fluorescens A506.  Appl. Environ. Microbiol. 79:5272-5282.

Cheng, X., de Bruijn, I., van der Voort, M., Loper, J.E., and Raaijmakers, J.M. 2013.  The Gac Regulon of Pseudomonas fluorescens SBW25.  Environmental Microbiology Reports 5:608-619.

Hartney S.L., Mazurier S., Girard M.K., Mehnaz S., Davis E.W., 2nd, Gross H., Lemanceau P., Loper J.E. 2013. Ferric-pyoverdine recognition by Fpv outer-membrane proteins of Pseudomonas protegens Pf-5. Journal of Bacteriology 195:765-776.

Kidarsa T.A., Shaffer B.T., Goebel N.C., Roberts D.P., Buyer J.S., Johnson A., Kobayashi D.Y., Zabriskie T.M., Paulsen I., Loper J.E. 2013. Genes expressed by the biological control bacterium Pseudomonas protegens Pf-5 on seed surfaces under the control of the global regulators GacA and RpoS. Environmental Microbiology 15:716-735.

Lim, C. K., Hassan, K. A., Penesyan, A., Loper, J. E., and Paulsen, I.T. 2013. The effect of zinc limitation on the transcriptome of Pseudomonas protegens Pf-5. Environmental Microbiology 15:702-715.

Lim, C.K., Penesyan, A., Hassan, K.A., Loper, J.E., and Paulsen, I.T. 2013.  Effect of tannic acid on the transcriptome of the soil bacterium Pseudomonas protegens Pf-5. Appl. Environ. Microbiol. 79:3141-3145.

Stockwell, V.O., Davis, E.W. 2nd, Carey, A., Shaffer, B.T., Mavrodi, D.V., Hassan, K.A., Hockett, K., Thomashow, L.S., Paulsen, I.T., and Loper, J.E. 2013.  pA506: A conjugative plasmid of the plant epiphyte Pseudomonas fluorescens A506.  Appl Environ Microbiol. PMID: 23811504

Loper, J. E., Hassan, K. A., Mavrodi, D. V., Davis, E. W. II, Lim, C. K., Shaffer, B. T., Elbourne, L. D. H., Stockwell, V. O., Hartney, S. L., Breakwell, K., Henkels, M. D., Tetu, S. G., Rangel, L. I., Kidarsa, T. A., Wilson, N. L., van de Mortel, J. E., Song, C., Blumhagen, R., Radune, D., Hostetler, J. B., Brinkac, L. M., Durkin, A. S., Kluepfel, D. A., Wechter, W. P., Anderson, A. J., Kim, Y. C., Pierson, L. S. III, Pierson, E. A., Lindow, S. E., Kobayashi, D. Y., Raaijmakers, J. M., Weller, D. M., Thomashow, L. S., Allen, A. E., and Paulsen, I. T. 2012. Comparative Genomics of Plant-Associated Pseudomonas spp.: Insights into Diversity and Inheritance of Traits Involved in Multitrophic Interactions. PLoS Genet 8:e1002784.

Subramoni, S., Gonzalez, J.F., Johnson, A., Péchy-Tarr, M., Rochat, L., Paulsen, I., Loper, J.E., Keel, C., and Venturi, V. 2011. A bacterial sub-family of LuxR regulators that respond to plant compounds.  Applied and Environmental Microbiology 77:4579-4588.

Hartney, S.L., Mazurier S., Kidarsa, T.A., Quecine, M.C., Lemanceau P., and Loper J.E. 2011. TonB-dependent outer-membrane proteins and siderophore utilization in Pseudomonas fluorescens Pf-5.  BioMetals 24:193-213.

Kidarsa T.A., Goebel N.C., Zabriskie T.M., Loper J.E. 2011. Phloroglucinol mediates crosstalk between the pyoluteorin and 2,4-diacetylphloroglucinol biosynthetic pathways in Pseudomonas fluorescens Pf-5. Molecular Microbiology 81:395-414.

Subramoni, S., Gonzalez, J.F., Johnson, A., Péchy-Tarr, M., Rochat, L., Paulsen, I., Loper, J.E., Keel, C., and Venturi, V. 2011. A bacterial sub-family of LuxR regulators that respond to plant compounds.  Applied and Environmental Microbiology 77:4579-4588.

Stockwell, V., Johnson, K., Sugar, D., and Loper, J.  2011.  .Mechanistically compatible mixtures of bacterial antagonists improves biological control of fire blight of pear. Phytopathology PMID: 20839962.

Hassan, K., Johnson, A., Shaffer, B.T., Ren, Q., Kidarsa, T.A., Elbourne, L., Hartney, S., Duboy, R. Goebel, N., Zabriskie, M., Paulsen, I.T., and Loper, J. E. 2010.  Inactivation of the GacA response regulator in Pseudomonas fluorescens Pf-5 has far-reaching transcriptomic consequences.  Environmental Microbiology 12: 899–915.

Mavrodi, D.V., Joe, A., Mavrodi, O.V., Hassan, K.A., Weller, D.M., Paulsen, I.T., Loper, J.E., Alfano, J.R., and Thomashow, L.S. 2010.  Structural and Functional Analysis of the Type III Secretion System from Pseudomonas fluorescens Q8r1-96.  J Bacteriol. PMID: 20971913.

Olcott, M. H., Henkels, M. D., Rosen, K. L., L.Walker, F., Sneh, B., Loper, J. E., and Taylor, B. J. 2010. Lethality and Developmental Delay in Drosophila melanogaster Larvae after Ingestion of Selected Pseudomonas fluorescens Strains, Plos ONE 5, e12504.

Stockwell, V.O., Johnson, K.B., Sugar, D., and Loper, J.E.  2010.  Control of Fire Blight by Pseudomonas fluorescens A506 and Pantoea vagans C9-1 Applied as Single Strains and Mixed Inocula. Phytopathology 100:1330-1339.

Gross, H., and Loper, J. E. 2009. Genomics of secondary metabolism in Pseudomonas spp.  Natural Product Reports 26:1408-46.

Hagen, M.J., Stockwell, V.O., Whistler, C. A., Johnson, K.B., and Loper, J.E. 2009.  Stress tolerance and environmental fitness of Pseudomonas fluorescens A506, which has a mutation in rpoS.  Phytopathology 99:679-688.

Mavrodi, D.V., Loper, J.E., Paulsen, I.T., and Thomashow, L.S. 2009. Mobile genetic elements in the genome of the beneficial rhizobacterium Pseudomonas fluorescens Pf-5.   BMC Microbiology 9:8.