Kent J. Bradford
Distinguished Professor of Plant Sciences
MS Michigan State University Horticulture 1977
Distinguished Professor -
Department of Plant Sciences,
Professor - Department of Plant
Vice Chair for Teaching and Curriculum Development - Department of Plant Sciences, UC Davis, 2006-2010
Chair - Department of Vegetable
Professor - Department of Vegetable Crops,
Overseas Fellow, Horticulture Research International,
September 1990-February 1991.
Visiting scientist, CSIRO, Division of Plant Industry,
Professor - Department of Vegetable Crops,
Professor - Department of Vegetable Crops,
Ph.D. advisors, U.C. Davis - T.C. Hsiao and S.F. Yang.
Awards and Honors
Award, Crop Science Society of
Fulbright Scholar, Universidad Nacional de Cuyo, Mendoza, Argentina, March-June, 1999
Lectureship, Wageningen Agricultural University, The
Overseas Fellowship, Vegetable Research Trust, Horticulture
Editorial and Professional Service
Editorial Board, Journal of Experimental Botany, 1994-present
Associate Editor, California Agriculture, 2006-present
Editorial Board, Journal of Plant Research, 2006-2010
Editorial Board, Seed Science Research, 1994-2007
Associate Editor, Seed Science Research, 2003-2007
Monitoring Editor, Plant Physiology, 1995-2000
Associate Editor, Crop Science, 1992-1995
Physiology, genetics, ecology, biochemistry, molecular biology and biophysics of seed development, dormancy, germination, and longevity; hormonal regulation of seed and plant development; mathematical modeling of germination responses to environmental factors; agricultural biotechnology.
Extramural grants and activities
Principal Investigator on extramural grants from the NSF, USDA, USAID and seed industry groups and companies.
Organized the Western Regional Seed Physiology Research Group, a unique voluntary cooperative effort of horticultural seed companies to fund a University-based fundamental research program targeted to the long-term needs of the seed industry. This Group has been in continuous operation since 1989 with an average of 12 member companies.
Founding Director of the UC Davis Seed Biotechnology Center (http://sbc.ucdavis.edu), a research, education and outreach unit of the College of Agricultural and Environmental Sciences dedicated to the development and commercialization of new plant and seed technologies for agricultural and consumer benefit. The SBC develops and operates research and education programs including the Plant Breeding AcademySM (http://pba.ucdavis.edu), which offers breeder education programs in the US, Europe, Asia (Thailand) and Africa.
Co-founder with Francois Korn (owner of SeedQuest (www.seedquest.com)) of Seed Central (www.seedcentral.org), an organization focusing on energizing the seed industry cluster in California and enhancing technology transfer from UC Davis to applications in plant breeding, seed production, agriculture and food technology.
Undergraduate courses: Currently teach Professionalism and Ethics in Genomics and Biotechnology (BIT 171, required course for students in Biotechnology major), Growth and Yield of Cultivated Plants (PLS 100B and 100BL, co-teach lecture section and primary instructor for laboratory). Previously taught Seed Production and Quality (all aspects of seed production, seed technology, seed storage, seed enhancement and seed utilization for crop establishment); Plants and People (general education course for non-majors and an overview of plant science;
Graduate courses: Science: Revelation, Discovery or Invention (PBI 223, a unique course reviewing and discussing original writings in the history and development of scientific methodology, epistemology, and philosophy from Plato and Aristotle to contemporary philosophers and scientists); Plant Biology Core Course (PBI 200B, provide one week of instruction on seed biology); Group Study in Seed Physiology (PLS 298, offered approximately every third year).
Extension courses: Seed
Biology, Production and Quality, 2-day intensive extension course offered
in alternate years and other courses offered by the
Mentoring: Directed the completion of 13 M.S. and 10 Ph.D. students since 1982. Currently major professor for 3 Ph.D. students. Supervised 16 postdoctoral research associates.
Publications (since 1997)
Journal articles (of 130 total)
Huo, H., Dahal, P., Kunusoth, K., McCallum, C.M., Bradford, K.J. 2013. Expression of 9-cis-EPOXYCAROTENOID DIOXYGENASE 4 (NCED4) is essential for thermoinhibition of lettuce seed germination but not for seed development or stress tolerance. Plant Cell 25: 884-900.
Boddy, L.G., Bradford, K.J., and Fischer, A.J. 2012. Population-based threshold models describe weed germination and emergence patterns across varying temperature, moisture and oxygen conditions. J. Applied Ecol. 49: 1225-1236.
Schwember, A.R., and Bradford, K.J. 2011. Oxygen interacts with priming, moisture content and temperature to affect the longevity of lettuce and onion seeds. Seed Sci. Res. 21: 175-185.
Argyris, J., Truco, M.J., Ochoa, O., McHale, L., Dahal, P., Van Deynze, A., Michelmore, R.W., Bradford, K.J. 2011. A gene encoding an abscisic acid biosynthetic enzyme (LsNCED4) collocates with the high temperature germination locus Htg6.1 in lettuce (Lactuca sp.). Theor. Appl. Genet. 122: 95-108.
Van Deynze, A.E., Hutmacher, R.B., and Bradford, K.J. 2011. Gene flow between Gossypium hirsutum and G. barbadense is asymmetric. Crop Sci. 51: 298-305.
Bradford, K.J., and Harada, J.J. 2010. Introduction to Translational Seed Biology: From Model Systems to Crop Improvement. Plant Sci. 179: 553-553. [Introduction to special issue of this journal edited by KJB and J.J. Harada based on Plant Science Symposium we organized in 2007.]
Schwember, A.R. and Bradford, K.J. 2010. Quantitative trait loci associated with longevity of lettuce seeds under conventional and controlled deterioration storage conditions. J. Exp. Bot.: 61: 4423-4436.
Miller, J.K., Herman, E.M., Jahn, M., and Bradford, K.J. 2010. Strategic research, education and policy goals for seed science and crop improvement. Plant Sci.: 179: 645–652.
Schwember, A.R., and Bradford, K.J. 2010. A genetic locus and gene expression patterns associated with the priming effect on lettuce seed germination at elevated temperatures. Plant Mol. Biol. 73: 105-118.
Argyris, J.M., Dahal, P., Hayashi, E., Still, D.W., and Bradford, K.J. 2008. Genetic variation for lettuce seed thermoinhibition is associated with temperature-sensitive expression of abscisic acid, gibberellin and ethylene biosynthesis, metabolism and response genes. Plant Physiol. 148: 926-947.
Bradford, K.J. 2008. Shang Fa Yang: Pioneer in plant ethylene biochemistry. Plant Science 175: 2-7.
Bradford, K.J., Benech-Arnold, R., Côme, D., and Corbineau, F. 2008. Quantifying the sensitivity of barley seed germination to oxygen, abscisic acid and gibberellin using a population-based threshold model. J. Exp. Bot. 59: 335-347.
Moravec, C.M., Bradford, K.J., and Laca, E.A. 2008. Water relations of drumstick tree seed (Moringa oleifera): imbibition, desiccation, and sorption isotherms. Seed Sci. & Technol. 36: 311-324.
Gealy, D.R., Bradford, K.J., Hall, L., Hellmich, R., Raybould, A., Wolt, J., and Zilberman, D. 2007. Implications of Gene Flow in the Scale-up and Commercial Use of Biotechnology-derived Crops: Economic and Policy Considerations. Council for Agricultural Science and Technology (CAST), Issue Paper 37. CAST, Ames, Iowa. www.cast-science.org.
Argyris, J., Truco, M.J., Ochoa, O., Knapp, S.J., Still, D.W., Lenssen, G.M., Schut, J.W., Michelmore, R.W., and
Gandhi, S., Heesacker, A., Freeman, C., Argyris,
Van Deynze, A.E., Sundstrom, F.J.,
Alvarado, V., and
Sánchez, M.P., Gurusinghe, S.H.,
Wu, C.T., and
Bradford, K.J., Downie, A.B., Gee, O.H., Alvarado, V.Y., Yang, H., Dahal, P. 2003. Abscisic acid and gibberellin differentially regulate expression of genes of the SNF1-related kinase (SnRK1) complex in tomato seeds. Plant Physiol. 132: 1560-1576.
Downie, B., Gurusinghe, S., Dahal, P., Thacker, R.R., Snyder, J.C., Nonogaki, H., Yim, K., Fukanaga, K., Alvarado, V., Bradford, K.J. 2003. Expression of a galactinol synthase gene in tomato is up-regulated before maturation desiccation and again after imbibition whenever radicle protrusion is prevented. Plant Physiol. 131: 1347-1359.
Gurusinghe, S., Powell,
Chen, F., Nonogaki, H., and Bradford, K.J. 2002. A gibberellin-regulated xyloglucan endotransglycosylase gene is expressed in the endosperm cap during tomato seed germination. J. Exp. Bot. 53: 215-223.
Kwong, F., Stodolski, L., Mari, J., Gurusinghe,
Chen, F., Dahal, P., and Bradford, K.J. 2001. Two tomato expansin genes show divergent expression and localization in embryos during seed development and germination. Plant Physiol. 127 : 928-936.
Wu, C.T., Leubner-Metzger, G., Meins, F. Jr. and Bradford K.J. 2001. Class I b-1,3-glucanase and chitinase are expressed specifically in the micropylar endosperm of tomato seeds prior to radicle emergence. Plant Physiol. 126: 1299-1313.
Gurusinghe, S., and Bradford, K.J. 2001. Galactosyl-sucrose oligosaccharides and potential longevity of primed seeds. Seed Sci. Res. 11: 121-133.
Chen, F., and Bradford, K.J. 2000. Expression of an expansin is associated with endosperm weakening during tomato seed germination. Plant Physiol. 124: 1265-1274.
Nonogaki, H., Gee,
Yang, H., Dahal, P. Mella,
R.A., Downie, B., Haigh,
Sitrit, Y., Hadfield,
K.A., Bennett, A.B.,
Downie, B., Gurusinghe, S.H., and
Cheng, Z., and
Gurusinghe, S.H., Cheng, Z.,
Downie, B., Dirk,
L.M.A., Hadfield, K.A., Wilkins, T.A., Bennett, A.B., and
Yim, K.-Y., and
Still, D.W., and
Allen, P.S., Bennett, M.A.,
Downie, B., Gurusinghe, S., Plopper, C.,
Dahal, P., Nevins, D.J., and Bradford, K.J. 1997. Relationship of endo-b-d-mannanase activity and cell wall hydrolysis in tomato endosperm to germination rates. Plant Physiol 113: 1243-1252.
Still, D.W., Dahal, P., and
Still, D.W., and
Books Authored or Co-authored (1)
Bewley, J.D., Bradford, K.J., Hilhorst, H.W.M., and Nonogaki, H. 2013. Seeds: Physiology of Development, Germination and Dormancy, Third Edition, Springer, NY.
Books Edited (3)
Book Chapters (22 total):
Pluskota WE, Bradford KJ, Nonogaki H. 2011.Tissue printing methods for localization of RNA and proteins that control seed dormancy and germination. In A.R. Kermode ed, Seed Dormancy: Methods and Protocols, Methods in Molecular Biology, vol. 773, pp. 329-339, Springer, New York, NY.
Allen, P.S., Benech-Arnold, R.L., Batlla, D.
and Bradford, K.J. 2007.
Modeling of seed dormancy. In Bradford, K.J., and Nonogaki, H., eds, Seed
Development, Dormancy and Germination, Blackwell Publishing,
Nonogaki, H., Chen, F. and
Bradford, K.J. 2006. Germination: internal
factors affecting (physical, physiological, molecular and biochemical). In Bewley, J.D., Black, M., and Halmer,
P., eds., The Encyclopedia of Seeds: Science, Technology and Uses. CABI
Kalaitzandonakes, N., Alston, J.M., and
De Castro, R.D., Bradford, K.J., and Hilhorst, H.W.M. 2004. Desenvolvimento e conteúdo de água [Development and water content]. In A.G. Ferreira and F. Borghetti, eds., Germinação, Artmed Editoria S.A., Porto Alegre-RS, Brasil, pp. 51-67.
De Castro, R.D., Bradford, K.J., and Hilhorst, H.W.M. 2004. Embebição e reativação do metabolismo [Imbibition and reactivation of metabolism]. In A.G. Ferreira and F. Borghetti, eds., Germinação, Artmed Editoria S.A., Porto Alegre-RS, Brasil, pp. 149-162.
Nonogaki, H., and Bradford, K.J. 2003. Tissue
printing for localization of mRNA expression in seeds. In Nicolás,
G., Bradford, K.J., Côme, D., and Pritchard, H.W.,
eds., The Biology of Seeds: Recent Research Advances, CAB International,
Alvarado, V., Nonogaki, H., and Bradford, K.J. 2000. Expression of endo-b-mannanase and SNF-related protein kinase genes in true potato seeds in relation to dormancy, gibberellin and abscisic acid. In J.D. Viemont and J. Crabbé, eds, Dormancy in Plants, CAB International, Wallingford, U.K., pp. 347-364.
Kozik, A., R.W. Michelmore, Knapp, M.S. Matvienko, L. Rieseberg, H. Lin, M. van Damme, D. Lavelle, P. Chevalier, J. Ziegle, P. Ellison, J. Kolkman, M.S. Slaubaugh, K. Livingston, L. Z. Zhou, S. Church, S. Edberg, L. Jackson and K. Bradford et al. 2002. Lettuce and sunflower ESTs from the Compositae Genome Project. http://compgenomics.ucdavis.edu/
Extension bulletins and publications (10 total):
Kunusoth, K., Dahal, P., Van Asbrouck, J.V., and Bradford, K.J. 2012. New technology for postharvest drying and storage of seeds. Seed Times (New Delhi) 5, 33-38.
Bradford, K.J. 2006. Methods to maintain
genetic purity of seed stocks.
Bradford, K.J. 2005. Biotech seed traceability & labeling: hindrance or asset to marketing and trade? Seed World 143(6): 16-22.
Van Deynze, A.,
Thomas, B.R., Van Deynze,
Sundstrom, F.J., Williams, J., Van Deynze,
Suslow, T.V., B.R. Thomas and K.J. Bradford. 2002.
Biotechnology provides new tools for plant breeding.