Sprayable drought resilience treatment through on-demand lignin composition modification

Overview

This project develops an on-demand sprayable treatment that increases plant resilience to drought without compromising growth or productivity. The approach works by modulating lignin composition—specifically increasing lignin aldehyde content—through reversible inhibitors of CINNAMYL ALCOHOL DEHYDROGENASE (CAD) enzymes. Unlike genetic modification, this universal chemical strategy can be applied across plant species without altering their natural habitat, offering a flexible and non-toxic solution for agriculture and forestry.

The technology addresses a critical challenge in agriculture: improving drought tolerance while maintaining yield. By targeting lignin biosynthesis at the enzymatic level, the treatment provides a practical, externally applied alternative to breeding or transgenic approaches.

Technical specifications

Core mechanism:

• Reversible inhibition of CAD enzymes, which regulate lignin aldehyde content in plant cell walls
• Increased lignin aldehyde levels have been shown to enhance drought resilience and recovery without reducing growth or productivity
• Sprayable formulation enables on-demand application directly to plants

Validation tools and methods:

• Fast in situ quantitative imaging tools to measure lignin aldehyde quantities and position directly in whole plant biopsies
• Inducible lignifying cell suspension cultures serving as biological model systems for chemical genomics screening
• Recombinant CAD enzymes for screening small compound libraries

Compound discovery approaches:

• Testing sulfamoylated phenylpropanoid analogs (SOAs) for their effect on lignin aldehyde content, plant growth, and drought resilience
• Identifying and validating new CAD inhibitors from small compound libraries using recombinant CADs, lignifying plant cell cultures, and whole plants

Technology readiness level

The project is built on a strong foundation of prior validation. Previous work has demonstrated that increasing lignin aldehydes in the model plant Arabidopsis does not reduce growth or productivity while enabling better drought sustainment and recovery. The research team has established the necessary biological model systems, imaging tools, and recombinant CAD proteins required for chemical screening and validation. The current stage involves identifying and validating specific CAD inhibitors through both repurposing existing compounds and discovering new candidates from compound libraries, with subsequent testing in cell cultures and whole plants to confirm drought resilience benefits.