Abstract
Plants acquire C in the form of CO2 from the air, and obtain N in the form of nitrate or ammonium and S in the form of sulfate from the soil. These elements are converted into materials necessary for the growth. In the past meetings, we reported co-activation of nutrient assimilation pathways in the transgenic Arabidopsis plants expressing maize Dof1, a transcriptional activator for expression of the genes encoding enzymes involved in carbon skeleton production. To investigate molecular mechanisms for co-activated assimilation pathways in the Dof1 transformants, we are currently performing identification of the direct target genes of Dof1 in the transformants and detailed analyses of mechanisms underlying enhanced N assimilation-dependent activation of S assimilation and C fixation. We will report the results of these analyses.
