An investigation of the detoxification of active oxygen species in black-grass (Alopecurus myosuroides) plants susceptible and resistant to herbicides

Elevated glutathione S-transferase activity in the herbicide-resistant blac k-grass biotype Peldon has been previously reported in this lab. This inves tigation focuses on activities of other enzymes involved in the detoxificat ion of active oxygen species (AOS). Study of four such enzymes revealed no difference in activities in susceptible and resistant biotypes, suggesting that increased herbicide tolerance in the Peldon biotype is not a result of greater general protection against AOS.