156-3 A Bacterial Biosensor for Detecting Early-Season Nitrogen Health in Cereal Crops.
Poster Number 1315
We hypothesized that GlnLux has potential as a biosensor for plant-available soil nitrogen in juvenile corn, in both the greenhouse and field. In the greenhouse, we found high correlation between different levels of applied nitrogen and GlnLux light emission from leaf extracts, indicating that the test may potentially serve as a good indicator of plant nitrogen health in the field. In the field, we found significant correlation between GlnLux output and pre-plant nitrogen application rate. We also performed correlation analysis of GlnLux output from field grown plants and soil nitrogen, total plant nitrogen, harvest biomass, kernel rows, grain and stover nitrogen, and grain yield, as well as SPAD, Greenseeker®, and Greenindex® measurements.
Our results suggest that GlnLux shows promise in providing information regarding plant nitrogen health as compared to commercially available tests such as the pre-sidedress soil nitrate test (PSNT), SPAD, Greenseeker®, and Greenindex®. We are now working to replicate our results and develop them into a model which might in the future be used by farmers for better management of nitrogen fertilization practices.