cDNA Macroarray Analysis of Light and Cytokinin Responses in Arabidopsis

Abstract

Most of responses of plant to external stimuli occur via various plant hormones, and it has been indicated that light signal is related to cytokinin. For example, the response to cytokinin in etiolated seedling is imitative of greening response to light. Although there are a lot of individual responses of plant like this example, it is difficult that we image whole system of plant responses to external stimuli.
In this study, we measured the response of 5-day etiolated Arabidopsis to light and cytokinin used by Arabidopsis cDNA macroarray (ca. 9000 locus). In this presentation, we will try to depict the whole response image of these two stimuli. Moreover, considering that light is received by leaf and that cytokinin is mainly produced in root, we will disscuss tissue specificity of light and cytokinin responsive genes.