Franck Dayan, professor, Agricultural Biology, Colorado State University, Fort Collins, presents “New Insight in the Mode of Action of Glufosinate.” The effect of glufosinate on glutamine synthetase and ammonia accumulation have been known for many years. However, our understanding of the contact action of this herbicide could not be accounted for by these effects. Our detailed investigation elucidated the biochemical mechanism leading to the rapid ROS-driven burn-down effect of glufosinate. During this research, we stumbled upon a physiological connection between glufosinate and PPO inhibitors that led to new synergistic herbicide mixtures.

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