Nitrate reductase is regulated by CIRCADIAN CLOCK-ASSOCIATED1 in Arabidopsis thaliana

Background and aims Nitrate reductase (NR) is highly conserved among plants and has an important role in plant nitrate assimilation pathway. Previous studies show that NR is regulated by circadian clock. However, the molecular mechanism remained elusive. In this study, we tried to find the central circadian clock component which is involved in transcriptional regulation of NR genes, NIA1 and NIA2 in Arabidopsis thaliana.