Molecular genetic analysis of phototropism in an asymmetric auxin distribution-indepent manner.

Our research aims to elucidate the molecular mechanism of phototropism in an asymmetric auxin distribution-independent manner. We have succeeded in discovering a new gene, PP2C, which is involved in phototropism in Arabidopsis thaliana. Recent studies suggested that PP2C may regulate gene expression through dephosphorylation of transcriptional regulators. So,we conducted this study to test the hypothesis that PP2C19 is involved in controlling the phototropic responses by altering auxin sensitivity through transcriptional regulation.