College of Agronomy and Biotechnology, Yunnan Agricultural University, No.95 Jinhei Road, Panlong District, Kunming 650201, China.
Plant Cell Physiol. 2024 Jul 30;65(7):1184-1196. doi: 10.1093/pcp/pcae045.
Altitude is an important ecological factor affecting plant physiology and ecology, material metabolism and gene expression. Tuber color changes were observed in purple and red potatoes growing at four different elevations ranging from 1,800 ± 50 to 3,300 ± 50 m in the Tiger Leaping Gorge area of Yunnan Province. The results showed that the total phenol content, total flavone content, total anthocyanin content and biological yield of anthocyanin increased with increasing altitude until 2,800 ± 50 m, and the highest anthocyanin content were detected in the purple potato Huaxinyangyu and the red potato Jianchuanhong at the flowering stage and budding stage, respectively. Combined transcriptomic and metabolomic analyses revealed that the content and diversity of flavonoids are associated with genes expression via the promotion of propane metabolism to improve potato adaptation to different altitudes. These results provide a foundation for understanding the coloring mechanism and creating new potato germplasms with high resistance and good quality via genetic manipulation.
海拔是影响植物生理和生态学、物质代谢和基因表达的重要生态因素。在云南省虎跳峡地区，从 1800±50 米到 3300±50 米的四个不同海拔高度，观察到紫色和红色土豆的块茎颜色发生变化。结果表明，总酚含量、总黄酮含量、总花青素含量和花青素生物产量随着海拔的升高而增加，直到 2800±50 米，在开花期和萌芽期，花青素含量最高的分别是紫色土豆华新洋芋和红色土豆剑川红。结合转录组学和代谢组学分析表明，类黄酮的含量和多样性与基因表达有关，通过促进丙烷代谢来提高土豆对不同海拔的适应能力。这些结果为了解着色机制以及通过遗传操作创造具有高抗性和良好品质的新土豆种质资源提供了基础。
