SRP343491 PRJNA775638 XRN4 is required for Arabidopsis circadian clock function The goal of this study was to compare the transcriptional profile (RNA-seq) of wild type (Columbia-0) and xrn4-3 Arabidopsis mutants plants grown under long day conditions (16h light, 8h dark) at 22 degree Celsius for 15 days and then transfer to continuous light.