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The daily rhythms of flowering-related gene expression. (A) Daily rhythms of 4-week-old leaves as revealed by RT-PCR. (B) Gene expression levels after addition of exogenous melatonin. (C) A model of delayed flowering in the snat2 mutant. EF-1a served as the loading control. Fully mature leaves of 4-week-old wild-type Col-0 Arabidopsis were infiltrated with 1 μM melatonin and harvested 3 h later. Water served as the control.
