Currently the non radioactive kits available are useful only for mammalian systems. I wish to know simple, cheap reagent or kit or idea to measure the movement of applied glucose to intact or excised root or leaf tissue
A nano_technology has been developped for sugar sensors but the level of sophystication is much more deep than radiometric tracing, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1560921/#bib6. One can also apply stable isotopes of 13C and detrmine fluxes by stable isdotope ratio analysis by sending samples to a facility.