Flowering transition is regulated by complex genetic networks in response to endogenous and environmental signals. Pre-mRNA splicing is an essential step for the post-transcriptional regulation of gene expression. Alternative splicing of key flowering genes has been investigated in detail over the past decade. However, few splicing factors have been identified as being involved in flowering transition. Human heterodimeric splicing factor U2 snRNP auxiliary factor (U2AF) consists of two subunits, U2AF35 and U2AF65, and functions in 3' splice site recognition in mRNA splicing. Recent studies reveal that Arabidopsis U2AF65a/b and U2AF35a/b play important roles in the splicing of key flowering genes. We summarize recent advances in research on splicing-regulated flowering transition by focusing on the role of Arabidopsis U2AF in the splicing of key flowering-related genes at ambient temperature and in the abscisic acid signaling pathways.

中文翻译：

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通过选择性剪接调节花期：U2辅助因子的作用。

响应内源和环境信号，花的过渡受复杂的遗传网络调节。mRNA剪接是转录后调控基因表达的重要步骤。在过去的十年中，已经对关键开花基因的选择性剪接进行了详细研究。然而，很少有剪接因子被认为与开花过渡有关。人异二聚体剪接因子U2 snRNP辅助因子（U2AF）由两个亚基U2AF35和U2AF65组成，并在mRNA剪接中的3'剪接位点识别中起作用。最近的研究表明，拟南芥U2AF65a / b和U2AF35a / b在关键开花基因的剪接中起重要作用。