On the Direct Observation of Water-FIuxes in Tissues and Leaves

Abstract

Abstract Based on the different absorption spectra of H2O and D2O in the near infrared (NIR, 800-2200 nm) a strategy is developed to measure H2O/D2O-fluxes in thin sections. The physical background of the method is presented. Results on the H2O/D2O-fluxes in filter paper and plant leaves together with both the physical and biological limitations of the new method are discussed.