Nuclear migration and positioning are fundamental processes of eukaryotic cells.To date,no evidence for a direct connection between nucleus migration and programmed cell death (PCD) has been described in the literature.The present study demonstrates the coupling of nuclear migration to the base of Arabidopsis root hairs with the PCD process.Based on our previous study,here we further established the regulatory role of caspase-3-1ike/DEVDase in root hair death and demonstrated the nucleus would migrate to a position close to the basement of the root hair in PCD process.