安托西亚尼丁减少酶的功能丧失突变激活了草中的安托西亚尼合成途径
Pengbo Xu1, Maobai Li2, Chao Ma1
1Shanghai Collaborative Innovation Center of Agri-Seeds, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
Molecular horticulture
|September 13, 2024
概括
改变草中的安托西亚尼丁减少酶 (ANR) 会增加安托西亚尼的积累,从而导致更深的红色水果. 这一发现为调节草果的颜色提供了洞察力,以提高消费者的吸引力.
科学领域:
- 植物分子生物学 植物分子生物学
- 果实生物化学 果实生物化学
- 农业科学 农业科学
背景情况:
- 水果的颜色显著影响消费者偏好和经济价值,因为红色较深的草由于含有更高的抗生素含量而更可取.
- 控制草深红色的特定分子机制尚未完全理解.
研究的目的:
- 阐明草中增强的安东素积累和深红色染色的遗传和分子基础.
- 为了研究安东基亚尼丁减少酶 (ANR) 在调节草果颜色中的作用.
主要方法:
- 对乙基甲硫酸盐突变物库的选,以识别具有改变水果颜色的突变物.
- 野生类型和突变草果的黄酸含量分析.
- 大量分离分析测序和转录组测序以确定负责的基因和调节途径.
主要成果:
- 确定了一种突变 (rg418),该突变呈现出早期安东积累和成熟水果中的更高含量.
- 该rg418突变被映射到安东基亚尼丁减少酶 (ANR),这是一个关键基因在proanthocyanidin合成.
- ANR突变导致氨酸和黄的增加,氨酸的减少,以及MYB105和UFGT的上调,从而增强氨酸的合成.
- 在白色果实 (myb10) 草中发生ANR突变导致粉红色果实,表明ANR在颜色调节中的多样性作用.
结论:
- 该研究确定ANR是草水果颜色的关键调节者,它影响了安素和益素的通路.
- 通过ANR突变对MYB105和UFGT的升级显著增加了安东素的产生.
- 这些发现为通过基因操纵改善草果色彩提供了宝贵的理论见解.
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