一个关键的R2R3-MYB转录因子激活了氨酸生物合成,并导致树突变物中的叶子变红
Weinan Li1,2, Qianqian Li1, Jiahang Che1
1State Key Laboratory of Efficient Production of Forest Resources, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.
Plant, cell & environment
|November 19, 2024
概括
研究人员确定了一个关键的基因,PdMYB113,它调节了装饰性树植物的红色. 这种基因促进了安东素的产生,增强了红色和紫色的叶子颜色,而不会阻碍生长,为新的木质植物品种提供了潜力.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 园艺园艺 园艺园艺
背景情况:
- 装饰性木质植物,如树 (Populus sp. ),在景观设计中以美学吸引力而受到重视.
- 叶子颜色的变化,特别是红色的色调,是可取的装饰特征.
- 了解这些颜色变异的遗传基础对于育种计划至关重要.
研究的目的:
- 识别和描述负责装饰性树品种红色染色的基因.
- 为了阐明树中安东氨酸生物合成的调节机制.
- 评估已识别的基因在培育新的多彩木质植物方面的潜力.
主要方法:
- 对具有不同叶子颜色的木突变体的转录组分析.
- 对R2R3-MYB基因的鉴定和命名,PdMYB113.
- 基因表达分析 (mRNA积累) 在不同的豆品种中.
- 转基因烟草和树的功能分析 (过度表达PdMYB113).
- 酵母一种混合和光酶测试以确认基因激活.
主要成果:
- 在红叶突变种中,PdMYB113的表达高,在原始品种中低.
- 在树和烟草中过度表达PdMYB113导致了素水平的增加和红色/紫色的变色.
- 证实PdMYB113可以激活关键的安托西亚尼生物合成基因 (PdCHS,PdANS).
- 过度表达PdMYB113的转基因植物没有表现出矮化.
结论:
- PdMYB113 是一种关键的阳性调节剂,对木的安托西亚尼生物合成和红色染色起作用.
- 这种基因在ZL2025木突变物中观察到的颜色变异中起着重要作用.
- PdMYB113代表了一种有价值的遗传资源,用于开发具有增强红色色素的新型装饰性木质植物品种.
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