Dietrich Gradmann

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Dietrich Gradmann (born June 3, 1940 in Ravensburg ) is a German plant physiologist and biophysicist .

Life

The son of Hans Gradmann and grandson of Robert Gradmann studied biology , chemistry , physics and mathematics at the University of Tübingen from 1959 to 1967 and received his doctorate there in 1970 on the electrophysiology of the seaweed Acetabularia . During his studies in Tübingen he became a member of the Tübingen royal society Roigel .

After research stays at the Université de Sherbrooke in Québec , Yale University , the University of Tübingen and at the Max Planck Institute for Biochemistry , the Heisenberg scholar was appointed professor at the University of Göttingen in 1984 , where he was in charge of the department for Plant Biophysics. He has lived in Tübingen ever since.

Gradmann's theoretical and experimental work deals with the numerical modeling of the electrical properties of membrane proteins ( ion channels , ion pumps and cotransporters ). He takes a critical part in the debate on so-called plant neurobiology .

His investigations lay u. a. suggests that action potentials of biomembranes were originally an accompanying phenomenon of osmoregulatory processes in unicellular organisms. According to this, the mechanisms of electrical signal transduction in metazoa and in some vascular plants are likely to have evolved independently of one another.

Web links

Individual evidence

  1. ↑ D. Gradmann: Influence of light, temperature and external medium on the electrical behavior of Acetabularia crenulata. In: Planta. 93, 1970, pp. 323-353.
  2. ^ A. Bertl, D. Gradmann: Current-voltage relationships of potassium channels in the plasmalemma of Acetabularia. In: J. Membrane Biol. 99, 1987, pp. 41-49.
  3. ^ D. Gradmann, HG Klieber, UP Hansen: Reaction kinetic parameters for ion transport from steady-state current-voltage curves. In: Biophys. J. 51, 1987, pp. 569-585.
  4. ↑ D. Gradmann, A. Berndt, F. Schneider, P. Hegemann: Rectification of the channel rhodopsin early conductance. In: Biophys. J. 101, 2011, pp. 1057-1068.
  5. ^ D. Gradmann, UP Hansen, CL Slayman: Reaction-kinetic analysis of current-voltage relationships for electrogenic pumps in Neurospora and Acetabularia. In: Curr. Top. Membrane Transp. 16, 1982, pp. 257-276.
  6. ^ R. Hagedorn, D. Gradmann, P. Hegemann: Dynamics of Voltage Profile in Enzymatic Ion Transporters, Demonstrated in Electrokinetics of Proton Pumping Rhodopsin. In: Biophys. J. 95, Dec 1, 2008, pp. 5005-5013.
  7. ^ D. Gradmann, CM Boyd: Fast, Triangular Voltage Clamp for Recording and Kinetic Analysis of an Ion Transporter Expressed in Xenopus Oocytes. In: Biophys J. 89, Jul 2005, pp. 734-744.
  8. ↑ a b B. Epping: The obscure brain of plants. In: Image of Science. 11/2009, pp. 30-33.
  9. ^ H. Mummert, D. Gradmann: Ion fluxes in Acetabularia: Vesicular shuttle. In: J. Membrane Biol. 124, 1991, pp. 264-272.
  10. ^ D. Gradmann: Impact of Apoplast Volume on Ionic Relations in Plant Cells. In: J. Membrane Biol. 184, 2001, pp. 61-69.
  11. ^ D. Gradmann, CM Boyd: Three Types of Membrane Excitations in the Marine Diatom Coscinodiscus wailesii. In: Membrane Biol. 175, May 2000, pp. 149-160.
personal data
SURNAME Gradmann, Dietrich
BRIEF DESCRIPTION German biophysicist
DATE OF BIRTH June 3, 1940
PLACE OF BIRTH Ravensburg