Degree: Ph.D. in Plant Pathology, May 2000

Degree: M.S. in Plant & Soil Sciences, May 1994

Degree: B.Sc. (Honours) Crop Science, Sept 1990.

Research Asst Prof, Department of Agricultural Sciences, Tennessee State University, Nashville. Aug. 2008 to Present. Research program with the focus on understanding the genetic mechanisms underlying pathogenesis of Plant Pathogenic soft rot Erwinia and Pseudomonas species which cause many diseases on diverse crop diseases. Using reporter transposon mutagenesis to catalogue and understand the roles of various genes in the pathogens ability to produce virulence factors and cause disease.

Research Asst Prof, Institute of Agricultural & Environmental Research, Tennessee State University, Nashville. Aug. 2005 to Aug. 2008. Established a research program with the focus on understanding the genetic mechanisms underlying pathogenesis of plant pathogenic Pseudomonas and soft rot Erwinia species which cause many diseases on many plant diseases. Also to study the roles of several genes in the virulence of the pathogen. Worked to develop molecular genetic-based biocontrol approaches for bacterial diseases on ornamental crops.

Post-doctoral Scientist, Department of Plant Pathology, University of California-Riverside. May 2000 to July 2005. Undertook research to understand the genetic mechanisms underlying pathogenesis of Xylella fastidiosa, the causal bacterium of Pierce’s disease of grapes and many other plant diseases. Studied the role of several genes in the virulence of the pathogen. Worked on developing molecular genetic and biocontrol approaches for the diseases caused by Xylella fastidiosa. Also studied gene expression profiling of X. fastidiosa using microarrays to identify and characterize the genes involved in rsmA’s control of biofilm formation and pathogenicity.

Graduate Research Assistant, Department of Plant Microbiology & Pathology, University of Missouri-Columbia. August 1993 to May 2000. Conducted research on molecular genetic determinants of pathogenesis by the bacterial pathogens, Erwinia amylovora, Pectobacterium (Erwinia) carotovora, and Pseudomonas syringae. Worked towards the PhD degree

Graduate Research Assistant, Center for Plant Biotechnology Research, Tuskegee University, Alabama. August 1991 to August 1993. Conducted research on genetic transformation and tissue culture of sweetpotato. Worked on the development of an in vitro tissue regeneration protocol for sweetpotato.

Sigma Xi, The Scientific Research Society. Elected full member 2001

American Society for Microbiology (since 1995)

American Phytopathological Society (since 1994).

Xiang Yang Shi, C. Korsi Dumenyo, Rufina Hernandez-Martinez, Hamid Azad, and Donald A. Cooksey. 2007. Characterization of Regulatory Pathways in Xylella fastidiosa: Genes and Phenotypes Controlled by algU. Appl. Envir. Microbiol 73: 6748-6756.

J. L. Bi & C. K. Dumenyo & R. Hernandez-Martinez & D. A. Cooksey & N. C. Toscano. 2007. Effect of Host Plant Xylem Fluid on Growth, Aggregation, and Attachment of Xylella fastidiosa. J. Chem Ecol. 33: 493-500

R. Hernandez-Martinez, H. S. Costa, C. K. Dumenyo, and D. A. Cooksey. 2006. Differentiation of strains of Xylella fastidiosa infecting grape, almonds and oleander using a multiprimer PCR Assay. Plant Disease 90:1382-1388

Costa, H.S., Raetz, R., Pinkard, T., Gispert, G., Hernandez-Martinez, R., Dumenyo, C. K., and Cooksey, D.A. 2004. Plant hosts of Xylella fastidiosa in and near Southern California vineyards. Plant Disease. 88:1255-1261.

Meinhardt, L. W., Ribeiro, M. P. M. A., Coletta-Filho, H. D., Dumenyo, C. K., Tsai, S. M., and Bellato, C. M. 2003. Genotypic analysis of Xylella fastidiosa isolates from different hosts using sequences homologous to the Xanthomonas rpf genes. Molecular Plant Pathology. 4: 327-335.

Ma, W., Cui, Y., Liu, Y., Dumenyo, C. K., Mukherjee, A. and Chatterjee, A. K. 2001. Molecular characterization of global regulatory RNA species that control pathogenicity factors in Erwinia amylovora and Erwinia herbicola pv. gypsophilae. Journal of Bacteriology 2001 183: 1870-1880

Keen, N. T., Dumenyo, C. K., Yang, C.-H. and Cooksey, D. A. 2000. From rags to riches: insights from the first genomic sequence of a plant pathogenic bacterium. Genome Biology 1:1019.1-1019.4

Dumenyo, C. K. Chatterjee, A. and Chatterjee, A. K. 2000. Erwinia. In: Otis C. Maloy and Timothy D. Murray (Ed.) Encyclopedia of Plant Pathology. Pages 430-432. John Wiley and Sons.

Dumenyo, C. K. Chatterjee, A. and Chatterjee, A. K. 2000. Pectate lyase. In: Otis C. Maloy and Timothy D. Murray (Ed.) Encyclopedia of Plant Pathology. Pages 744-746. John Wiley and Sons.

Dumenyo, C. K. Chatterjee, A. and Chatterjee, A. K. 2000. Pectin lyase In: Otis C. Maloy and Timothy D. Murray (Ed.) Encyclopedia of Plant Pathology. Pages 746-747. John Wiley and Sons.

Dumenyo, C. K. Chatterjee, A. and Chatterjee, A. K. 2000. Phytobacteriology In: Otis C. Maloy and Timothy D. Murray (Ed.) Encyclopedia of Plant Pathology. Pages 762-769. John Wiley and Sons.

Dumenyo, C. K. Chatterjee, A. and Chatterjee, A. K. 2000. Polygalacturonase. In: Otis C. Maloy and Timothy D. Murray (Ed.) Encyclopedia of Plant Pathology. Pages 793-795. John Wiley and Sons.

Dumenyo, C. K. Chatterjee, A. and Chatterjee, A. K. 2000. Extracellular proteins: Secretion pathways. In: Otis C. Maloy and Timothy D. Murray (Ed.) Encyclopedia of Plant Pathology. Pages 440-443. John Wiley and Sons.

Chatterjee, A. K., Dumenyo, C. K., Liu, Y. and Chatterjee, A. 2000. Erwinia: genetics of pathogenicity factors. In: J. Lederberg (Ed), Encyclopedia of Microbiology. Vol 2, 2nd Edition, Pages 236-259, Academic Press.

Cui, Y., Mukherjee, A., Dumenyo, C. K., Liu, Y. and Chatterjee, A. K. 1999. rsmC of the soft rotting bacterium Erwinia carotovora subsp. carotovora negatively controls extracellular enzyme and harpinEcc production and virulence by modulating levels of regulatory RNA (rsmB) and RNA-binding protein (RsmA). Journal of Bacteriology 181:6042-6052.

Dumenyo, C. K., Mukherjee, A., Chun, W. and Chatterjee, A. K. 1998. Genetic and physiological evidence for the production of N-acyl homoserine lactone analogs by Pseudomonas syringae pv. syringae and other fluorescent plant pathogenic Pseudomonas species. European Journal of Plant Pathology 104:569-582.

Mukherjee, A., Cui, Y., Liu, Y., Dumenyo, C. K. and Chatterjee, A. K. 1996. A global regulatory gene controls secondary metabolites, motility, and pathogenicity factors in Erwinia amylovora. Acta Horticulturae 411: 237-241

Cui, Y., Madi, L., Mukherjee, A., Dumenyo, C. K. and Chatterjee, A. K. 1996. The RsmA- mutants of Erwinia carotovora subsp. carotovora strain Ecc71 overexpress hrpNEcc and elicit a hypersensitive reaction-like response in tobacco leaves. Molecular Plant-Microbe Interactions 9:565-573

Mukherjee, A., Cui, Y., Liu, Y., Dumenyo, C. K. and Chatterjee, A. K. 1996. Global regulation in Erwinia species by Erwinia carotovora rsmA, a homologue of Esherichia coli csrA: repression of secondary metabolites, pathogenicity and hypersensitive reaction. Microbiology (UK) 142: 427-434.

Cui, Y., Chatterjee, A., Liu, Y., Dumenyo, C. K. and Chatterjee, A. K. 1995. Identification of a global repressor, rsmA, of Erwinia carotovora subsp. carotovora that controls extracellular enzymes, N-(3-oxohexanoyl)-L-homoserine lactone and pathogenicity in soft rotting Erwinia species. Journal of Bacteriology 177:5108-5115

Chatterjee, A., Cui, Y., Liu, Y., Dumenyo, C. K. and Chatterjee, A. K. 1995. Inactivation of rsmA leads to overproduction of extracellular pectinases, cellulases and proteases in Erwinia carotovora subsp. carotovora in the absence of the starvation/cell density-sensing signal, N-(3-oxohexanoyl)-L-homoserine lactone. Applied & Environmental Microbiology 61:1959-1967.

Porobo-Dessai, A.; Gosukonda, R. M., Blay, E., Dumenyo, C. K. and Prakash, C. S. 1995. Plant regeneration of sweetpotato (Ipomoea batatas L.) from leaf explants in vitro using a two-stage protocol. Scientia Horticulturae 62:217-224.

Dumenyo, C. Korsi. 2008. A Model System for Bacterial Diseases of Ornamentals. Tenn. State University Inst. Of Ag. & Environ. Res. Seminar Series. 14 May 2008.

Dumenyo, C. Korsi. 2007. Genetic analysis of soft rot pathogenesis. Tenn. State University Inst. Of Ag. & Environ. Res. Seminar Series. 13 June 2007.

Shi, X., C.K Dumenyo, R. Hernandez-Martinez, H. Azad & D. Cooksey. 2006. Genetic Analysis of algU Gene of Xylella Fastidiosa. Abstract for poster presentation at 106^th ASM General Meeting. Orlando, FL

Hernandez-Martinez, R. C. Korsi Dumenyo and D. A. Cooksey. 2006. Site-directed mutagenesis of acvB gene in a Pierce’s disease strain of Xylella fastidiosa. Phytopathology 96:S47.

Dumenyo, C. Korsi. 2006. Functional genomic analysis of the plant pathogen, Xylella fastidiosa. Tenn. State University Inst. Of Ag. & Environ. Res. Seminar Series. 08 March 2006.

Dumenyo, C. K., R. Hernandez-Martinez, T. Reignier, D. A. Cooksey. 2004. rsmA (csrA) affects biofilm formation in Xylella fastidiosa PD strain A05. Abst. # H-044 presented at the 104^th ASM General Meeting. New Orleans, LA.

Dumenyo, K., Hernandez-Martinez, R., Reignier, T., Azad, H., & Cooksey, D. 2003. Biological control of Pierce’s disease with non-pathogenic strains of Xylella fastidiosa. Poster presented at the 2003 Pierce’s Disease Research Symposium. Dec 1-12, 2003. Coronado, California.

Hernandez-Martinez, R., C. K. Dumenyo, D. A. Cooksey. 2003. Gene arrays and mutational analysis to identify virulence genes in Xylella fastidiosa. Poster presented at the 2003 Pierce’s Disease Research Symposium. Dec 1-12, 2003. Coronado, California

Lee, S.-D.; Bianco, R.; Dumenyo, K.; Azad, H. R.; Schiller, N. L.; Cooksey, D. A. 2003. Control of Pierce’s disease through degradation of xanthan gum. Poster presented at the 2003 Pierce’s Disease Research Symposium. Dec 1-12, 2003. Coronado, California.

Dumenyo, C. K., Hernandez-Martinez, H., Azad, R., and Cooksey, D. A. 2003. Site-Directed mutagenesis of specific genes in a Pierce's Disease strain of Xylella fastidiosa. Abstract Number: H-147 presented at the 103rd ASM General Meeting. Washington, DC.

Hernandez-Martinez, R., Dumenyo, C. K. and Cooksey, D. A. 2002. Gene expression profile of pathogenicity factors in Xylella fastidiosa. Phytopathology 92:S36.

Chatterjee, A. K., Dumenyo, C. K., Cui, Y., Ma, W-L., Liu, Y. and Mukherjee, A. 1999. Global regulation of gene expression in Photorhabdus luminescens, a symbiont of entomopathogenic nematodes: effects of an RNA-binding protein (RsmA) and a regulatory RNA (rsmB). Abstract No. P10. 50th Annual meeting of Society for Industrial Microbiology. August 1-5, 1999. Arlington, Virginia.

Dumenyo, C. K., Ma, W-L., Chatterjee, A., Cui, Y., Liu, Y. and Chatterjee, A.K. 1999. Analysis of global regulator genes controlling pathogenicity factors of Erwinia amylovora and E. herbicola pv. gypsophilae. Phytopathology 89:S22.

Mukherjee, A., Liu, Y., Cui, Y., Dumenyo, C. K and Chatterjee, A. K. 1998. Erwinia carotovora subsp. carotovora: characterization of RsmA, a RNA-binding protein which mediates post-transcriptional regulation. Abstract No. 6.145. 7th International Congress of Plant Pathology, Edinburgh, Scotland, August 6-16, 1998.

Chatterjee, A. K., Cui, Y., Liu, Y., Dumenyo, C. K. and Mukherjee, A. 1997. Identification of a new regulatory locus, (rsmB, renamed rsmC) of Erwinia carotovora subsp. carotovora that controls extracellular enzymes, Harpin and RsmA. Phytopathology 87:S18

Dumenyo, C. K., Mukherjee, A. and Chatterjee, A. K. 1996. Production of N-acyl homoserine lactone analogs by Pseudomonas syringae pv. syringae and other fluorescent plant pathogenic Pseudomonas, Phytopathology 86:S76

Cui, Y., Chatterjee, A., Liu, Y., Dumenyo, C. K. and Chatterjee, A. K. 1995. Characterization of a global regulatory gene, rsmA, of Erwinia carotovora subsp. carotovora. Phytopathology 85:1186

Dumenyo, C. K., Blay, E., Porobo-Dessai, A. and Prakash, C. S. 1993. Effect of Agrobacterium growth stage and culture density on the transformation efficiency of sweetpotato. Abstract No. 903. Hortscience 28:583.

Prakash, C. S., Gosukonda, R., Porobo-Dessai, A., Blay, E. and Dumenyo, C. K. 1993. An efficient in vitro regeneration method to produce adventitious plants in sweetpotato. Hortscience 28:262.

Dumenyo, C. K., and Prakash. C. S. 1993. Factors affecting the efficiency and frequency of Agrobacterium-mediated genetic transformation of sweetpotato (Ipomoea batatas). Sigma Xi Research Symposium, Tuskegee University. March 26-27, 1993. Winner of Second Place Graduate paper.

Prakash, C. S., Dessai, A. P., Murthy, G. R., Dumenyo, C. K. He, G., Zheng, Q., Egnin, E., and Kanyand, M. 1993. Biotechnology approaches for improving sweetpotato. Paper presented at the International Symposium on Tropical Root Crops- Problems, Prospects and Future Strategies. Trivandrum, India. November 6-9, 1993.

Dumenyo, C. K. and Ofori, I. K., 1993. Field performance of two gamma rays-induced mutantys of green gram (Vigna radiata) on the Accra plains. Sigma Xi Research Symposium, Tuskegee University. March 27-28, 1993.

Dessai, A. P., Gosukonda, R., Blay, E., Dumenyo, C. K. and Prakash, C. S. 1993. Improved adventitious regeneration of sweetpotato. Poster presented at the Congress on Cell and tissue culture. June 5-9, 1993.

Prakash, C.S., Porobo-Dessai; A., Blay; E. T., Gosukonda, R. M., Dumenyo, C. K. and Medina-Bolivar, L. F.1992. Improved protocols for regeneration and transformation of Sweetpotato (Ipomoea batatas). International Conference on Biotechnology for Crop Improvement in Latin America. November 1-7 1992. Caracas, Venezuela

Dumenyo, C. K. and Prakash, C. S. 1992. Effects of antibiotics on sweetpotato explants in vitro. Ninth biennial symposium of Association of Research Directors, 1890 Land Grant Universities. October 4-8 1992. Atlanta, Georgia.

BIOL 3400 Introductory Microbial Physiology

CK Dumenyo, instructor. 3 credits, Spring 2008

Introduction to Microbial Physiology. The Course dealing with the salient features in the physiology of microorganisms. The Objective is to introduce students majoring in biology to the physiology of prokaryotic organisms with the intent to assist them in gaining a higher level of appreciation and understanding of the chemical processes required for life to exist. It is also intended that students see how the various mechanisms for sustaining life are used to classify or group microorganisms. Selected examples of the metabolism of carbohydrates, lipids, and nitrogen-containing compounds are considered as a basis for further understanding biologic phenomena

BIOL3401 Introduction to Microbial Physiology and Laboratory

CK Dumenyo, instructor, PA Agyemang, Graduate Assistant 1 credit, Spring 2008

This lab class dealing with the salient features in the physiology of microorganisms especially bacteria in the lab. Students in this class had the opportunity and experience of isolating bacteria form the natural environment of their choice, purifying the isolates and using physical, biochemical and molecular approaches to characterize their isolates. The students gained hands-on laboratory experience in the techniques are involved in the process.