Triazine herbicide resistance in the photosynthetic bacterium Rhodopseudomonas sphaeroides

AUTOR(ES)

Brown, Alfred E.

RESUMO

The photoaffinity herbicide azidoatrazine (2-azido-4-ethylamino-6-isopropylamino-s-triazine) selectively labels the L subunit of the reaction center of the photosynthetic bacterium Rhodopseudomonas sphaeroides. Herbicide-resistant mutants retain the L subunit and have altered binding properties for methylthio- and chloro-substituted triazines as well as altered equilibrium constants for electron transfer between primary and secondary electron acceptors. We suggest that a subtle alteration in the L subunit is responsible for herbicide resistance and that the L subunit is the functional analog of the 32-kDa QB protein of chloroplast membranes.

Documentos Relacionados

• Plasmid rearrangements in the photosynthetic bacterium Rhodopseudomonas sphaeroides.
• In vivo intermembrane transfer of phospholipids in the photosynthetic bacterium Rhodopseudomonas sphaeroides.
• Fixation of dinitrogen derived from denitrification of nitrate in a photosynthetic bacterium, Rhodopseudomonas sphaeroides forma sp. denitrificans.
• Inorganic nitrogen assimilation by the photosynthetic bacterium Rhodopseudomonas capsulata.
• THE METABOLISM OF ACETONE BY THE PHOTOSYNTHETIC BACTERIUM RHODOPSEUDOMONAS GELATINOSA