Inhibition of Barnyardgrass 4-Hydroxyphenylpyruvate Dioxygenase by Sulcotrione

  title={Inhibition of Barnyardgrass 4-Hydroxyphenylpyruvate Dioxygenase by Sulcotrione},
  author={Jacob Secor},
  booktitle={Plant physiology},
  • J. Secor
  • Published in Plant physiology 1 December 1994
  • Chemistry
4-Hydroxyphenylpyruvate dioxygenase (EC was partially purified from barnyardgrass (Echinochloa crus-galli L.) leaves and assayed by high-performance liquid chromatography analysis of product formation or by the capture of released 14CO2. The bleaching herbicide sulcotrione [2-(2-chloro-4-methanesulfonylbenzoyl)-1,3-cyclohexanedione] was shown to be a potent, linear competitive inhibitor of 4-hydroxyphenylpyruvate dioxygenase. Kinetic analyses determined that the Km for the substrate… 

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