New herbicides targeting sulfur assimilation and photosynthesis inhibition

Overview

This research introduces groundbreaking herbicides aimed at controlling aggressive C4 weeds through novel mechanisms. By inhibiting phosphoenolpyruvate carboxylase (PEPC) and O-acetylserine (thiol) lyase (OAS-TL), these herbicides target crucial enzymes in the pathways of photosynthesis and sulfur assimilation. This dual-action approach not only impedes weed growth but also offers a new mode of action against C4 plants, which are notoriously difficult to manage.

Technical specifications

• PEPC Inhibition: This enzyme plays a critical role in CO2 fixation in C4 plants. Inhibition leads to decreased CO2 assimilation and increased pyruvate levels, indicating effective disruption of photosynthesis.
• OAS-TL Inhibition: Essential for sulfur assimilation, its inhibition reduces L-cysteine content, stunting plant growth. Treated plants supplemented with L-cysteine exhibit normal growth, validating the mechanism.
• Validation Stages:
  • Formulation development to enhance absorption and efficacy
  • Efficacy evaluation in post- and pre-emergence scenarios
  • Comprehensive physiological and biochemical analyses
  • Field testing under real-world conditions

Technology readiness level

Currently at Technology Readiness Level 4, these herbicides have demonstrated effectiveness in laboratory settings with in vitro and in vivo assays. Ongoing efforts focus on formulation optimization and field testing to advance these solutions towards commercial application.