Meet the Faculty
PhD, University of Chicago, 1996
Postdoctoral Fellow, Brandeis University, 1996-1998
BS (with university honors), Carnegie-Mellon University, 1990
Areas of Interest:
Early in his career, Dr. Kramer’s research focus was the deformation of crumpled materials, and his work on crumpling noise was widely reported in the media. His current research applies biophysical and computer modeling techniques to plant growth and development. Examples include wood grain pattern formation and root system development.
Quantitative Aspects of Auxin Transport and Plant Development
Auxin is a plant hormone that has been implicated in most aspects of plant development. It is synthesized in growing leaves and buds, transported downward through the stem and roots, and has additional effects in the tips of growing roots. Recent progress in cell and molecular biology has clarified many key aspects of auxin synthesis, transport and signaling. Dr. Kramer's research combines experiment, biophysical theory, and computer models to examine auxin transport and its role in plant development. He has several ongoing research collaborations with plant biologists interested in quantitative approaches. This includes a permanent visiting research fellowship at the new Center for Plant Integrative Biology (CPIB) in Nottingham, U.K.
- "AuxV: a database of auxin transport velocities". E. M. Kramer, Heidi L. Rutschow & Sturm S. Mabie, Trends in Plant Science 16: 461-463 (2011). Abstract
- "Regulation of solute flux through plasmodesmata in the root meristem". H. Rutschow, T. Baskin & E. M. Kramer, Plant Physiology 155: 1817-1826 (2011). Full Text
- "The advantages of a tapered whisker". C. M. Williams & E. M. Kramer, PLoS ONE 5: e8806 (2010). Full Text
- "Auxin-regulated cell polarity: an inside job?" E. M. Kramer, Trends in Plant Science 14: 242-247 (2009).
- "Auxin transport through non-hair cells sustains root-hair development." A. R. Jones, E. M. Kramer, K. Knox, R. Swarup, M. J. Bennett, C. M. Lazarus, H. M. O. Leyser & C. S. Grierson, Nature Cell Biology 11: 78-84 (2009).
- "Auxin gradients are associated with polarity changes in trees". E. M. Kramer, M. Lewandowski, S. Beri, J. Bernard, M. Borkowski, M. H. Borkowski, L. A. Burchfield, B. Mathisen, & J. Normanly, Science 320: 1610 (2008). Full Text
- "The auxin influx carrier LAX3 promotes lateral root emergence." K. Swarup, E. Benkova, R. Swarup, I. Casimiro, B. Peret, Y. Yang, G. Parry, E. Nielsen, I. De Smet, S. Vanneste, M. P. Levesque, D. Carrier, N. James, V. Calvo, K. Ljung, E. M. Kramer, R. Roberts, N. Graham, S. Marillonnet, K. Patel, J. D. G. Jones, C. G. Taylor, D. P. Schachtman, S. T. May, G. Sandberg, P. N. Benfey, J. Friml, I. D. Kerr, T. Beeckman, L. Laplaze, & M. J. Bennett, Nature Cell Biology 10: 946-954 (2008).
- "Computer models of auxin transport: a review and commentary." E. M. Kramer, J. Exp. Bot. 59: 45-53 (2008).
- "Measurement of diffusion within the cell wall in living roots of Arabidopsis thaliana." E. M. Kramer, N. L. Frazer, & T. I. Baskin, J. Exp. Bot. 58: 3005-3015 (2007).
- "Wood grain pattern formation: a brief review." E. M. Kramer, Journal of Plant Growth Regulation 25: 290-301 (2006).
- "How far can a molecule of weak acid travel in the apoplast or xylem?" E. M. Kramer, Plant Physiology 141: 1233-1236 (2006).
- "Auxin transport: a field in flux." E. M. Kramer and M. J. Bennett, Trends in Plant Science 11: 382-386 (2006).
- "Root gravitropism requires lateral root cap and epidermal cells for transport and response to a mobile auxin signal." R. Swarup, E. M. Kramer, P. Perry, K. Knox, H. M. O. Leyser, J. Haseloff, G. T. S. Beemster, R. Bhalerao, & M. J. Bennett, Nature Cell Biology 7: 1057-1065 (2005).
- "PIN and AUX/LAX proteins: their role in auxin accumulation." E. M. Kramer, Trends in Plant Science 9: 578-582 (2004).
- "Wood Grain Patterns at Branch Junctions: Modeling and Implications." E. M. Kramer & M. H. Borkowski, Trees 18: 493-500 (2004).
- "Defect Coarsening in a Biological System: The Vascular Cambium of Cottonwood Trees." E. M. Kramer & J. V. Groves, Phys. Rev. E 67: article no. 041914 (2003).
- "A Mathematical Model of Pattern Formation in the Vascular Cambium of Trees." E. M. Kramer, J. Theor. Biol. 216: 147-158 (2002).v"Singularities, Structures, and Scaling in Deformed m-Dimensional Elastic Manifolds." B. A. DiDonna, T. A. Witten, S. C. Venkataramani, & E. M. Kramer, Phys. Rev. E 65: article no. 016603 (2001).
- "A Mathematical Model of Auxin-mediated Radial Growth in Trees." E. M. Kramer, J. Theor. Biol. 208: 387-397 (2001).
- "Avoidance Model for Soft Particles II: Positional Ordering of Charged Rods." E. M. Kramer & J. Herzfeld, Phys. Rev. E 61: 6872-6878 (2000).
- "Limitations on the Smooth Confinement of an Unstretchable Manifold." S. C. Venkataramani, T. A. Witten, E. M. Kramer, & R. P. Geroch, J. Math. Phys. 41: 5107-5128 (2000).
- "Observation of Topological Defects in the Xylem of Populus deltoides and Implications for the Vascular Cambium." E. M. Kramer, J. Theor. Biol. 200: 223-230 (1999).
- "Avoidance Model for Soft Particles I: Charged Spheres and Rods Beyond the Dilute Limit." E. M. Kramer & J. Herzfeld, J. Chem. Phys. 110: 8825 (1999).
- "Distribution Functions for Reversibly Self-Assembling Spherocylinders." E. M. Kramer & J. Herzfeld, Phys. Rev. E 58: 5934 (1998).
- "Stress Condensation in Crushed Elastic Manifolds." E. M. Kramer & T. A. Witten, Phys. Rev. Lett. 78: 1303 (1997).
- "The von Karman Equations, the Stress Function, and Elastic Ridges in High Dimensions." E. M. Kramer, J. Math. Phys. 38: 830 (1997).
- "Universal Power Law in the Noise from a Crumpled Elastic Sheet." E. M. Kramer & A. Lobkovsky, Phys. Rev. E. 53: 1465 (1996).
- "Defect Coarsening and Spin Waves in the Nonlinear Sigma Model." E. M. Kramer, Phys. Rev. E 50: 3594 (1994).
Dr. Kramer has received research grants from the NIH, NSF, and USDA