Chronotherapy-based strategies to reduce agrochemical input and enhance crop stress tolerance

Overview

This solution applies chronotherapy — the science of timing biological interventions to internal circadian rhythms — to crop protection and plant stress management. The research investigates how the circadian clock of plants influences their response to herbicides such as glyphosate, as well as their tolerance to aluminum toxicity and phosphorus-use efficiency. Preliminary findings suggest that wild tomatoes and hairy-fleabane exhibit desynchronized biological clocks that correlate with higher herbicide tolerance, and that short-day photoperiods favor aluminum tolerance by maintaining root growth. The overarching goal is to identify natural metabolites that synchronize plant clocks and can be co-applied with glyphosate to boost herbicide performance, ultimately reducing chemical inputs and supporting soil health in agricultural systems.

Technical specifications

Key features and findings:

• Glyphosate tolerance in wild tomatoes and hairy-fleabane appears linked to delayed systemic herbicide effects across leaves
• Short-day (SD) photoperiods maintain root cell division under aluminum stress, while long-day (LD) photoperiods promote phosphorus-deficiency symptoms
• Wild tomatoes display naturally desynchronized biological clocks associated with enhanced stress tolerance
• Planned validation will identify clock-synchronizing metabolites from tomato leaflet segments and test them in combination with glyphosate
• Research aims to elucidate genetic and metabolic pathways linking circadian oscillations to aluminum tolerance, phosphorus efficiency, and herbicide response

Potential applications:

• Reduced-rate herbicide programs through chronotherapy-informed application timing
• Breeding or metabolite-based strategies to improve aluminum tolerance in acid soils
• Improved phosphorus-use efficiency in crops grown under suboptimal photoperiods

Technology readiness level

The research is at an early-to-mid stage (TRL 2–4). Foundational laboratory experiments using single-leaf glyphosate dose assays and controlled photoperiod trials have been completed in tomato and hairy-fleabane. Future validation will involve metabolite identification and combined glyphosate–metabolite trials to confirm clock-synchronization effects on herbicide efficacy and stress tolerance. Field-scale validation and commercial formulation development remain to be undertaken.