Uptake of 15NO2 by sunflower (Helianthus annum) during exposures in light and darkness: quantities, relationship to stomatal aperture and incorporation into different nitrogen pools within the plant
Institute of Radioagronomie (IRA), Research Centre Fülich Ltd. (KFA), D-52425 Fülich, Germany;Institute of the Chemistry of the Polluted Atmosphere (ICG-2), Research Centre Fülich Ltd. (KFA), D-52425 Fülich, Germany