Dual nitrite-ph fluorescent biosensor for soil microbial activity monitoring
A cutting-edge biosensor using dual fluorescent proteins to monitor nitrite and pH levels in soil, providing a robust proxy for microbial activity. This system enables automated, in situ measurements to assess soil health and nitrogen transformation.
Overview
The dual nitrite-pH fluorescent biosensor is an innovative solution designed to monitor soil microbial activity by measuring nitrite and pH levels. This sophisticated sensor leverages dual fluorescent proteins embedded within a self-assembling protein matrix, enabling it to accurately gauge soil conditions. By integrating low-cost optical components, the system facilitates automated and repeated fluorescence measurements, offering a 'microbial activity signature' that reflects nitrogen transformations and responses to inputs such as biostimulants. This technology holds significant potential for enhancing soil health monitoring practices.
Technical specifications
- Dual Fluorescent Proteins: Measures both nitrite and pH levels to provide a comprehensive view of soil microbial activity.
- Self-Assembling Protein Matrix: Protects the sensing mechanism from soil interference while allowing diffusion of relevant analytes.
- Automated Optical Components: Enables repeated, hands-free fluorescence measurements.
- Ratiometric Detection: Ensures selective and accurate detection of nitrite and pH changes, crucial for assessing microbial function.
- Calibration and Sensitivity: Engineered for soil-relevant conditions, tested for sensitivity, selectivity, temperature response, and photostability.
Technology readiness level
Currently at TRL 3, the biosensor is in the early stages of development. The initial phases involve engineering and calibrating the sensors for soil-relevant conditions, integrating them into a protective matrix, and validating the system in controlled environments. Further development and validation will enhance its readiness for practical field applications.
About Kansas State University
Kansas State University is a comprehensive public land‑grant research university with multiple campuses and a strong applied mission. Industry partners tap a statewide extension network that connects companies to field sites, talent, and rapid outreach; campus pilot plants and analytical services enable bench‑to‑pilot scale validation, while co‑located high‑containment facilities support regulated studies. The Olathe campus in the Kansas City metro serves as an industry‑engagement hub with workforce pipelines, collaborative labs, and proximity to the Kansas City Animal Health Corridor. Research is supported by competitive federal funding from agencies such as NSF, NIH, USDA, and DOE, alongside state and corporate sponsors, and a dedicated technology transfer office streamlines IP, sponsored research, and startup formation.
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