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在番茄果实成熟过程中,SLMADS-Macrocalyx (MC) 的特殊调节作用

Cailian Wang¹, Mao Xue¹, Shan Li²

¹College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, People's Republic of China.

International journal of biological macromolecules

|December 11, 2025

概括

这就是Slmads-MC基因.

科学领域:

植物分子生物学植物分子生物学
果实成熟法规果实成熟法规
番茄的遗传学番茄的遗传学

背景情况:

这种SLMADS-RIN复合体对于番茄果实成熟至关重要.
以前的研究确定了MC在开花和脱落中的作用,但其果实成熟功能尚未被探索.
涉及RIN-MC融合蛋白的rin突变,对成熟进行负面调节.

研究的目的:

研究MC在番茄果实成熟中的调节作用和机制.
了解MC的功能,不仅仅是它在花发育中的已知作用.

主要方法:

对MC蛋白的遗传学分析.
在不同组织和乙烯处理下对基因表达的分析.
对MC过度表达 (OE) 和CRISPR/Cas9淘汰 (CR) 番茄系的生成和表型分析.
在OE-MC和CR-MC线上进行差异基因表达分析 (DEGs).
双露西法酶记者测定用于评估MC的转录活性.

主要成果:

MC蛋白在进化上与FUL1/FUL2相关,并具有EAR抑制域.
在花朵和水果中,MC表达更高,由乙烯诱导.
无论是MC过度表达还是淘汰都延迟了番茄果实成熟的开始和乙烯峰值.
在OE-MC和CR-MC系中观察到一致的DEG模式,其中关键的成熟基因如ACS2和RIN的下调.
MC蛋白激活了LoxC和ACS2的促进体.

结论:

在番茄果实成熟开始时,Slmads-MC起着复杂的调节作用.
MC作为负调节剂,延迟成熟的开始.
通过调节关键成熟相关基因的表达,MC影响成熟.

关键词:

果实成熟法规果实成熟法规这就是SLMADS-MC.这种植物是Solanum lycopersicum.

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