PARENT SESSION
Poster Session # 22: Late-Breaking Newsworthy Posters
Friday, August 8 Presentation from 8:30 AM to 10:00 AM. SITCC Exhibit Hall B.
Polarization sensing of ancient and modern lineage plants under stress.
Finkelman, Steven *,1, Egeton-Warburton, Louise2, Nordine, John 1, Lentz, David2, Rix, Jim1, Hampton, Scott1, 1 Containerless Research, Inc., Evanston, Illinois, usa2 Chicago Botanic Garden, Glencoe, Illinois, usa
ABSTRACT- Traditional methods of in-situ spectrometry contend with weak signals (e.g., chlorophyll fluorescence) or interference of specularly reflected light (reflectance spectrometry). Polarization spectrometry provides strong signals and eliminates the specular interference associated with reflectance spectra of vegetation. In this study, we are investigating the application of broad-and narrow-band photopolarimeters to detect and characterize absorption spectra within individual leaves and across plant communities. Species examined include ancient and modern lineages of sunflowers, beans, and corn, that have been exposed to environmental stressors (e.g., nitrogen, eutrophication and drought) under controlled greenhouse conditions. In field studies, measurements have been made on field-grown corn and are underway on oak and maple trees across a nitrogen deposition gradient. Here, we present preliminary data from the greenhouse and field studies, and discuss their possible ecological relevance.
Key words: field-truth sensing, polarization spectrometry, stress, instrumentation