NtMYB12 要求在 Narcissus tazetta tepals 中的黄和 (亲) 氨酸氨基酸生物合成之间进行竞争
Jingwen Yang1, Xi Wu1, Cristina Belen Aucapiña1
1Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
Molecular horticulture
|October 3, 2023
概括
这项研究揭示了NtMYB12转录因子如何控制花植物的花色. 它调节了对黄醇和酸的竞争性代谢途径,影响了花颜色.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 生物化学 生化学
背景情况:
- 花的颜色对于传粉者吸引力和纳西斯的装饰价值至关重要.
- 了解色素生物合成的遗传基础是植物育种和美学的关键.
研究的目的:
- 确定和描述 NtMYB12 转录因子在控制 Narcissus 颜色通路中的作用.
- 阐明了纳西斯花中黄醇和氨酸积累的基础调节机制.
主要方法:
- 野生类型和突变的纳西斯组织的比较转录组分析.
- 基因克隆 (基因组行走),双露西法酶和染色体免疫沉试验.
- 蛋白质相互作用研究包括酵母二杂交,双分子光补充和共免疫沉.
主要成果:
- NtMYB12直接调节醇 (NtFLS,NtLAR) 和素 (NtDFR,NtANS) 生物合成途径中的关键基因.
- NtMYB12具有双重功能:它单独激活了黄醇的产生,而在与NtbHLH1和NtWD40-1的复合体中,它促进了氨酸的积累.
- 这种双重调节决定了黄醇和氨酸路径之间的代谢流量竞争,决定了花的颜色.
结论:
- NtMYB12是纳西斯的颜色生物合成的中央调节者,控制着黄和素通路.
- MYB-bHLH-WD40 (MBW) 综合体的形成调节了NtMYB12的功能,导致了不同的色素结果.
- 这种复杂的调节网络对于在花植物中观察到的多样化的花颜色至关重要.
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