Recapturing lost carbon sequestration capabilities in legume crops through root trait restoration
Research platform leveraging root system imaging, soil microbiome profiling, and root exudate analysis to identify and restore carbon-sequestering traits lost during crop domestication. Focused on chickpea, lentil, and pea, with applications in sustainable agriculture, soil carbon storage, and climate-resilient crop breeding.
Overview
This research initiative addresses a critical climate challenge: restoring the soil carbon sequestration capabilities that were lost during thousands of years of crop domestication. The work centers on the hypothesis that artificial selection for above-ground harvest traits inadvertently reduced root system size and complexity in domesticated crops, along with their associations with beneficial soil microbial communities. By characterizing these lost traits in wild relatives of key legume crops, the program aims to inform breeding strategies that rebuild soil carbon storage while maintaining agricultural productivity.
Soil carbon sequestration is increasingly recognized as essential to climate mitigation because soils globally hold approximately ten times more carbon than the atmosphere. Restoring root carbon inputs also improves soil fertility, creating dual benefits for growers and the environment.
Technical specifications
Research approach and capabilities:
- Non-destructive root system visualization to quantify root architecture differences between wild and domesticated varieties
- Characterization of soil microbial community identity and function using modern microbiome profiling methods
- Metabolomic profiling of root exudates using a 50% methanol plus 0.05% formic acid extraction protocol that preserves root cell integrity and captures metabolites across a broad polarity range
- Identification of several hundred metabolites per sample through public databases including MassBank, AraCyc, and PubChem
- Controlled growth systems using mapping populations in 50 mL tubes with field soil mixed with perlite for reproducible validation
Target species:
- Chickpea, lentil, and pea, three Fertile Crescent legumes with well-developed genomic tools and parallel domestication histories
- Preliminary evidence already demonstrates reduced root system size and reduced microbial diversity in domesticated varieties compared to wild relatives
Technology readiness level
The program is at an early-to-mid research stage with preliminary validation completed. Root system size reductions have been confirmed in three legume species, and shifts in soil microbial community diversity have been observed. Root exudate profiling remains to be validated and represents the next research milestone. The work is positioned to generate actionable findings for crop breeding programs and could support development of new legume varieties with enhanced carbon sequestration potential within a several-year research horizon.
About University of Vermont
The University of Vermont is a mid‑sized, comprehensive public land‑grant research university in Burlington with an integrated academic medical center and a statewide mission. Industry partners engage through co‑located hospital and campus laboratories, shared core facilities, and field sites that enable clinical studies, validation, and prototyping. A statewide extension network connects companies with applied research, pilot demonstrations, and workforce training across Vermont’s communities. Research is supported by competitive federal funding from agencies such as NIH, NSF, USDA, and DOE. A dedicated technology transfer office streamlines IP, licensing, and startup formation and offers flexible agreements that make collaboration straightforward for corporate R&D.
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