Is HUBl a Hub for Plant Fitness?
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Recently, we have identified circadian clock genes as targets of Histone Monoubiquitinationl (HUBl) in Arabidopsis from a transcriptome comparison between the hub I-I mutant and HUB] overexpression lines. HUBI affected the amplitudes of the circadian clock gene expression profiles in the hub 1-1 mutant that coincided with reduced monoubiquitination of histone H2B at their coding regions. Here we showed that parameters for plant fitness are altered in HUB 1 mutant and overexpression lines, suggesting that the histone H2B monoubiquitination status affects plant fitness.