Abstract
Recent intensive studies on Arabidopsis thaliana have begun to shed light on the molecular mechanisms underlying the biological clock. We have been characterizing a small famiry of protein, designated as Arabidopsis pseudo response regulators, including APRR1 that is identical to TOC1, which is believed to be a component of central clock. Through our recent studies, several lines of evidence have already been provided to support the view that, not only APRR1/TOC1, but also other APRR1/TOC1 members are crucial for a better understanding of the molecular links between circadian rhythm, control of flowering time, and also photomorphogenesis. Amongst the APRR1/TOC1 family members, nonetheless, the least characterized one is APRR3 in the sense that no genetic study has been done to see if whether APRR3 also plays an important role in the circadian associated biological events. Here we provide such evidence from the intensive characterization of a transgenic line aberrantly overexpressing APRR3.
