Root architecture-altering microbes for agrochemical retention and soil biodiversity

Overview

This research explores the use of herbicide-tolerant Root Architecture Altering Microbes (RAAMs) to address agrochemical loss caused by soil erosion and water runoff. The work investigates how specific microbes interact with plants to modify root architecture, potentially retaining nutrients and agrochemicals in the soil while preserving soil biodiversity. By understanding the genetic pathways triggered during plant-microbe interactions, the research aims to develop biological solutions that balance agrochemical usage with sustainable agricultural practices.

The project targets a critical agricultural challenge: water-soluble agrochemicals are frequently lost through runoff and leaching caused by high rainfall. The proposed microbial biopriming approach offers a biological pathway to expand the three-dimensional architecture of the rhizosphere, supporting nutrient retention and plant growth even in herbicide-treated environments.

Technical specifications

Research approach:

• Isolation and characterization of herbicide-tolerant microbes from agrochemical-treated fields with high soil erosion
• Assessment of microbial tolerance to organochlorine herbicides
• Evaluation of plant growth regulator secretion by tolerant isolates
• Measurement of relative root growth rate changes induced by microbial interaction
• Biopriming studies demonstrating significant expansion of rhizosphere three-dimensional architecture
• Investigation of auxin and ethylene dependent pathways in plant-microbe signaling
• Analysis of ion channel uptake receptors involved in nutrient acquisition
• Genomics and transcriptomics approaches to correlate herbicide tolerance mechanisms with phytohormone-related pathways
• Development of molecular networks linking microbial activity with root architectural parameters
• Digital modeling of root systems and genetic pathways responsive to these microbes

Test crop species:

• Tomato
• Rice
• Green gram
• Arabidopsis as a model plant

Technology readiness level

The research is at an early-to-mid stage of development. Preliminary studies have identified microbes with variable tolerance to organochlorine herbicides and demonstrated their ability to secrete plant growth regulators and alter relative root growth rates. Initial biopriming experiments have shown statistically significant expansion of rhizosphere three-dimensional architecture. Additional findings on nutrient leaching prevention are currently in communication for publication. Further validation through genomics, transcriptomics, and broader crop testing is planned to fully characterize the mechanisms and establish commercial viability.