Intrinsic and exogenous signals in conjunction precisely regulate the initiation of flowering. Both signals influence flowering time, which is an integral part of plant reproduction. The signals converge through different pathways, and their coordinated action leads to the onset of flowering. Genetic pathways related to the regulation of flowering time are well-known from research into the molecular genetics of Arabidopsis thaliana. Specifically, crucial components of the photoperiodic pathway and floral integrators play a critically significant role in flowering. In this study, we found that GATA25 is a novel transcription factor that accelerates flowering time under long days. GATA25 encodes C-X2-C-X20-C-X2-C conserved cysteine residues of the zinc-finger domain and CCT domain which process photoperiodic flowering and regulate circadian rhythms. Flowering was accelerated by overexpression of GATA25 throughout the Arabidopsis thaliana. In contrast, GATA25 fused to SRDX (SUPERMAN repressive domain X)-motif plants showed delayed flowering. We also demonstrated that GATA25 induced the expression of floral integrator genes and photoperiodic pathway-related genes. Together, these results suggest that GATA25 might act to accelerate flowering time.

中文翻译：

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GATA25是一种新型调节剂，可加速拟南芥的开花时间

内在和外源信号一起精确地调节开花的开始。这两种信号都会影响开花时间，而开花时间是植物繁殖的一个组成部分。这些信号通过不同的途径汇聚，它们的协同作用导致开花的开始。与开花时间调控相关的遗传途径在拟南芥分子遗传学研究中是众所周知的。具体来说，光周期通路的关键成分和花整合剂在开花中起着至关重要的作用。在这项研究中，我们发现 GATA25 是一种新型转录因子，可在长日照下加速开花时间。GATA25 编码锌指结构域和 CCT 结构域的 C-X2-C-X20-C-X2-C 保守半胱氨酸残基，其处理光周期开花并调节昼夜节律。整个拟南芥中 GATA25 的过度表达加速了开花。相比之下，与 SRDX（SUPERMAN 抑制域 X）-基序融合的 GATA25 植物显示延迟开花。我们还证明了 GATA25 诱导了花整合基因和光周期通路相关基因的表达。总之，这些结果表明 GATA25 可能起到加速开花时间的作用。