Li Long, Ye Jing, Li Houhua, Shi Qianqian
College of Forestry, Northwest A&F University, Yangling, China.
College of Landscape Architecture and Art, Northwest A&F University, Yangling, China.
Front Plant Sci. 2020 Nov 20;11:572517. doi: 10.3389/fpls.2020.572517. eCollection 2020.
exhibits a wide range of flower colors and is a valuable ornamental plant. The combination of flavonols/anthocyanins and carotenoids provides various colorations ranging from yellow to violet-blue. However, the complex metabolic networks and molecular mechanisms underlying the different flower colors of remain unclear. Based on comprehensive analysis of morphological anatomy, metabolites, and gene expression in different-colored flowers of , the mechanisms relating color-determining compounds to gene expression profiles were revealed. In the case of flower color, hirsutin, rosinin, petunidin-, and cyanidin-type anthocyanins and the copigment herbacetin contributed to the blue coloration, whereas peonidin-, cyandin-, and delphinidin-type anthocyanins showed high accumulation levels in pink flowers. The color formation of blue and pink were mainly via the regulation of (), (c47583, ), and (). Yellow coloration was mainly due to gossypetin and carotenoid, which were regulated by (), (), () as well as many carotenoid biosynthetic pathway-related genes. Co-expression network and transient expression analysis suggested a potential direct link between flavonoid and carotenoid biosynthetic pathways through MYB transcription factor regulation. This work reveals that transcription changes influence physiological characteristics, and biochemistry characteristics, and subsequently results in flower coloration in
呈现出广泛的花色，是一种有价值的观赏植物。黄酮醇/花青素和类胡萝卜素的组合提供了从黄色到紫蓝色的各种颜色。然而，其不同花色背后复杂的代谢网络和分子机制仍不清楚。通过对其不同颜色花朵的形态解剖、代谢物和基因表达进行综合分析，揭示了颜色决定化合物与基因表达谱之间的机制。就其花色而言，hirsutin、rosinin、矮牵牛素 - 和花青素型花青素以及共色素杨梅黄酮促成了蓝色，而芍药色素、花青素和飞燕草色素型花青素在粉色花朵中积累水平较高。蓝色和粉色的颜色形成主要通过（）、（c47583，）和（）的调控。黄色主要归因于棉黄素和类胡萝卜素，它们受（）、（）、（）以及许多类胡萝卜素生物合成途径相关基因的调控。共表达网络和瞬时表达分析表明，通过MYB转录因子调控，类黄酮和类胡萝卜素生物合成途径之间可能存在直接联系。这项工作表明转录变化影响生理特征和生化特征，进而导致其花色形成
