Cellular and Molecular Life Sciences CMLS

, Volume 55, Issue 10, pp 1255–1277

Herbicide resistance and supersensitivity in photosystem II

  • W. Oettmeier

DOI: 10.1007/s000180050370

Cite this article as:
Oettmeier, W. CMLS, Cell. Mol. Life Sci. (1999) 55: 1255. doi:10.1007/s000180050370


Resistance to triazine herbicides in higher plants was first observed in 1970. A mutation in the photosystem II reaction center D1 protein at position Ser264→Gly is responsible for this resistance. So far, 37 single mutants, 16 double mutants, 5 triple mutants and 5 deletion/insertion mutants in the D1 protein have been obtained by randomly induced and site-directed mutagenesis in cyanobacteria and algae. The influence of these mutations on the binding affinities of different classes of herbicides will be discussed. Because a sufficiently high resolution X-ray structure of photosystem II does not yet exist, the reaction center of purple photosynthetic bacteria, which is homologeous to photosystem II, served as a model. In the bacterial reaction center a total of 25 single and 3 double herbicide-resistant mutants have been generated.

Key words. L-subunit; D1 protein; QB-site; herbicide binding affinities; molecular modeling.

Copyright information

© Birkhäuser Verlag Basel, 1999

Authors and Affiliations

  • W. Oettmeier
    • 1
  1. 1.Lehrstuhl Biochemie der Pflanzen, Ruhr-Universität, D-44780 Bochum (Germany), Fax +49 234 7094322, e-mail: walter.oettmeier@ruhr-uni-bochum.deDE