Abstract
UV damages the plants by targeting the DNA, photosynthetic apparatus, a wide variety of physiological processes and generation of reactive oxygen species (ROS). Our previous study using tobacco cell cultures (Nicotiana tabacum L.; cell line, Bel-B and Bel-W3), involvements of ROS and calcium signaling in UV-C-dependent cell death induction were suggested. Here, we examined the impact of UV-C irradiation on the onset of programmed cell death mechanism in cell suspension cultures of Arabidopsis thaliana (Ecotype, Columbia). Data indicated that UV-C induces the cell death through the action of induced ROS. Further analysis with several mutants and transgenic cell lines suggested that salicylic acid signal transduction pathway is also involved.
