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该AcbHLH153-AcBBX19模块通过抑制AcAAT1调节基维果雌激素生物合成

Qing Cao^1,2, Jinyin Chen¹, Zhenyu Huang^3,4,5

¹Jiangxi Provincial Key Laboratory for Postharvest Storage and Preservation of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China.

Journal of agricultural and food chemistry

|February 25, 2026

概括

乙烯通过抑制抑制剂AcBBX19和AcbHLH153来增强果中的醇芳香,这些抑制剂通常会抑制关键基因AcAAT1. 这项法规改善了水果的香味和质量.

科学领域:

植物生物化学植物生物化学
收获后生物学收获后生物学
分子遗传学分子遗传学

背景情况:

埃斯特芳香生物合成显著影响收获后果的质量.
控制果中的生物合成的调节机制尚未完全理解.

研究的目的:

调查收获后基维果中的芳香生物合成的动态变化和调节机制.
为了确定关键的基因和转录因子参与调节生物合成.

主要方法:

分析芳香化合物和基因表达的动态变化.
基因克隆,功能分析 (过度表达和沉默) 的AcAAT1.
转录因子 (AcBBX19,AcbHLH153) 及其相互作用的识别和表征.
乙烯和1-甲基cyclopropene处理研究乙烯的作用.

主要成果:

乙烯处理促进了生物合成,水果软化和可溶性固体,而1-甲基cyclopropene则具有相反的效果.
确定了AcAAT1作为一种关键的乙转移酶基因,用于生物合成;它的过度表达增加了,而沉默则减少了它们.
AcBBX19直接抑制了AcAAT1的表达,而乙烯信号抑制了AcBBX19.
AcBBX19与AcbHLH153相互作用,增强了AcAAT1的抑制,两种蛋白质共同抑制了生物合成.

结论:

乙烯通过抑制AcbHLH153-AcBBX19转录模块来促进基维果生物合成,缓解了AcAAT1.1上的抑制.
这项研究阐明了一种新的转录性调节网络,该网络控制收获后的水果香味形成.

关键词:

这就是 AcAAT1 的原因.在 AcBBX1919 中.在 AcbHLH1533中使用.埃斯特芳香生物合成生物合成果 (Kiwi) 是一种果.

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