Tian Chang, Zhai Lisheng, Wang Jingjing, Zhu Wenjing, Shi Chunmei, Jiang Jiafu, Zhao Kunkun, Li Fei, Zhou Lijie, Song Aiping, Xiong Guosheng, Li Shengben, Chen Fadi, Chen Sumei
National Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, No. 1 Weigang, Xuanwu District, Nanjing 210095, China.
College of Horticulture, Nanjing Agricultural University, Nanjing Agricultural University, No. 1 Weigang, Xuanwu District, Nanjing 210095, China.
Hortic Res. 2025 May 23;12(7):uhaf095. doi: 10.1093/hr/uhaf095. eCollection 2025 Jul.
The precise timing of flowering in response to environment plays a crucial role in the reproductive processes of plants. The FLOWERING LOCUS T (FT)-FD module is a well-established key node in the photoperiod-mediated pathway. However, the identity of novel partners involved in this network and its regulatory mechanisms remain elusive in most nonmodel species. Here, we found that // () functions as a floral repressor in . Its upstream transcriptional regulator () promotes flowering by directly repressing expression. The expression levels of both genes are short-day inducible. Interestingly, FLOWERING LOCUS T-like3 (CmFTL3) interacts with FD-like1 (CmFDL1), which activates floweringaccelerating gene - (). Meanwhile, CmTCP7 interacts with CmFTL3 and CmFDL1, delaying the CmFTL3 and CmFDL1 complex-promoted flowering in chrysanthemum "Jinba." These findings reveal a novel regulatory module controlling photoperiod-dependent flowering in chrysanthemum.
植物响应环境精确调控开花时间在其生殖过程中起着关键作用。成花素基因座T（FT）-FD模块是光周期介导途径中一个已明确的关键节点。然而，在大多数非模式物种中，参与该网络的新伙伴及其调控机制仍不清楚。在此，我们发现//（）在中作为开花抑制因子发挥作用。其上游转录调节因子（）通过直接抑制表达来促进开花。这两个基因的表达水平均受短日照诱导。有趣的是，成花素基因座T样3（CmFTL3）与类FD1（CmFDL1）相互作用，激活促进开花的基因-（）。同时，CmTCP7与CmFTL3和CmFDL1相互作用，延迟了菊花“津巴”中CmFTL3和CmFDL1复合物促进的开花。这些发现揭示了一个控制菊花光周期依赖性开花的新调控模块。
