[No authors listed]
Fine-tuning of flowering timing is crucial for plants to survive and leave offspring and depends on various endogenous and environmental factors. Here we report the identification of a vascular transcription factor, ANAC075, a putative regulator of VASCULAR-RELATED NAC-DOMAIN7 (VND7), as a negative regulator of flowering in Arabidopsis. Loss of function of ANAC075 causes the upregulation of floral integrator genes and early flowering under both long- and short-day conditions. ANAC075 promoter activity was detected in vascular tissues, including phloem. Previous reports suggested that ANAC075 is a transcriptional activator involved in the secondary cell wall formation, implying that the promotion of flowering time in anac075 mutants is caused by the disruption of flowering-time gene regulation in phloem and/or vascular tissue formation.
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