Abstract
Our previous study using mutant and transgenic of tobacco and Arabidopsis cell suspension cultures suggested that reactive oxygen species (ROS), calcium and salicylic acid signaling involved UVC-induced cell death. In UVC-induced salicylic acid signaling, SID2 and NPR1 did not play key role as cell death inducers as cells with sid2, npr1 and NPR over expression showed. UVC-induced PR1 gene expression is generally known. Same date was shown by our researches using Arabidopsis and tobacco cell suspension cultures. It was suggested UVC-induced PR1 gene expression was depended on ROS, calcium and NPR1. It was known that NPR1, TGA1 and WRKY70 were important gene in salicylic acid signaling. Those gene was induced by UVC irradiation in Arabidopsis cell suspension was shown. We analyzed UVC-induced NPR1, TGA1 and WRKY70 gene expression.
