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模块SlHsfC1-SlGAI3通过Gibberellin信号通路控制番茄的生长和发育

Yafei Qin^1,2,3, Mei Wang^1,2,3, Daodao Tang^1,2,3

¹College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China.

Plants (Basel, Switzerland)

|December 11, 2025

概括

热冲击转录因子 SlHsfC1 通过改变吉伯雷林 (GA) 信号传递,导致植物的矮化. SlHsfC1上调GA信号抑制剂,损害GA反应并降低植物的高度.

科学领域:

植物分子生物学植物分子生物学
无生物应激反应应激反应
基因规则基因规则

背景情况:

植物在非生物压力下表现出抑制的生长.
热冲击转录因子 (Hsfs) 在应激反应中起作用.

研究的目的:

研究热冲击转录因子SlHsfC1在植物生长和发育中的作用.
阐明SlHsfC1影响植物高度的机制.

主要方法:

在植物中生成SlHsfC1过度表达 (OE) 线.
对植物表型,细胞大小和激素水平 (gibberellins) 的分析.
基因表达分析吉伯雷林生物合成,新陈代谢和信号通路.
蛋白质-DNA相互作用测定 (例如,ChIP-qPCR) 来确认直接结合.

主要成果:

SlHsfC1的OE线表现出一个矮体现型,细胞大小减少.
观察到高水平的生物活性吉伯雷林 (GA),但外部GA3应用并没有拯救表型.
提高GA生物合成基因的调节和降低GA代谢基因的调节导致GA的积累.
对GA信号转导抑制剂 (SlGAI2,SlGAI3) 的升调损害了GA信号传递.
证实SlHsfC1可以直接结合并激活SlGAI3促进体.

结论:

SlHsfC1通过调节吉伯雷林信号来负面调节植物的高度.
热冲击转录因子 SlHsfC1 作为 GA 信号通路中的关键调节者,在压力条件下影响植物生长.

关键词:

在 GA 信号通路上.在SlGAI3I3中使用.这就是SlHsfC1的意义.矮人的现象型在外源GA3中.吉伯雷林斯 (Gibberellins) 是一个古老的

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