Abstract
FR light exposure altered gene expression of six aquaporin genes in the root of Arabidopsis(Sato-Nara et al., 2004), which led us to visualize water in the plant and to trace its time dependent change using an NMR microscope. We successfully imaged water in Arabidopsis seedlings with high signal-to-noise ratio by developing a new sample preparation technique. In addition, our own attachment for the microscope provided appropriate light and dark environment in the NMR probe containing Arabidopsis. After dark adaptation for three days, the seedling was exposed to the FR light. Influence of FR light on the time dependent change in water content at any location of the root was numerically traced and analyzed by successive recording of 1H signal. We discuss not only phyA but also another photoreceptor that might be involved in water regulation by FR.
