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- W2157745077 abstract "The transition to flowering in Arabidopsis is characterized by the sharp and localized upregulation of APETALA1 (AP1) transcription in the newly formed floral primordia. Both the flower meristem-identity gene LEAFY (LFY) and the photoperiod pathway involving the FLOWERING LOCUS T (FT) and FD genes contribute to this upregulation. These pathways have been proposed to act independently but their respective contributions and mode of interaction have remained elusive. To address these questions, we studied the AP1 regulatory region. Combining in vitro and in vivo approaches, we identified which of the three putative LFY binding sites present in the AP1 promoter is essential for its activation by LFY. Interestingly, we found that this site is also important for the correct photoperiodic-dependent upregulation of AP1. In contrast, a previously proposed putative FD-binding site appears dispensable and unable to bind FD and we found no evidence for FD binding to other sites in the AP1 promoter, suggesting that the FT/FD-dependent activation of AP1 might be indirect. Altogether, our data give new insight into the interaction between the FT and LFY pathways in the upregulation of AP1 transcription under long-day conditions." @default.
- W2157745077 created "2016-06-24" @default.
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- W2157745077 date "2011-07-18" @default.
- W2157745077 modified "2023-10-17" @default.
- W2157745077 title "Integrating long-day flowering signals: a LEAFY binding site is essential for proper photoperiodic activation of APETALA1" @default.
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- W2157745077 doi "https://doi.org/10.1111/j.1365-313x.2011.04660.x" @default.
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