数字农科院2.0

Florigen and Florigen-Like Genes Regulate Temperature-Responsive Flowering in Tomato

文献类型： 外文期刊

作者： Song, Jia;Zhao, Shiqi;Fang, Siyu;Wang, Xiaotian;Sun, Shuai;Li, Baohua;Li, Ren;Liu, Lu;Cui, Xia

作者机构：

关键词： FTL2;SFT;flowering time;high temperature;tomato

期刊名称： ADVANCED SCIENCE

ISSN：

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Seasonal temperature fluctuations serve as crucial environmental cues that regulate plant reproductive timing, yet the mechanisms underlying thermoresponsive flowering regulation in tomato remain poorly understood. The study uncovers a temperature-sensing mechanism in the tomato shoot apical meristem coordinated through antagonistic interactions between a florigen-like protein FLOWERING LOCUS T-Like 2 (FTL2) and florigen protein SINGLE-FLOWER TRUSS (SFT). Under short day conditions, FTL2 expression is specifically upregulated at the shoot apex by high temperature and functions as a flowering repressor. FTL2 physically interacts with the floral inducer SFT, directly suppressing its transcriptional activity to delay floral transition. This FTL2-SFT regulatory circuit enables tomato precise integration of photoperiodic and thermal signals at the shoot apex, providing a molecular framework for seasonal flowering adaptation. The findings elucidate a fundamental mechanism of temperature perception in tomato flowering control and provide broader insights into how florigen-based networks contribute to adaptive flowering control across plant species.

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