三种绿绒蒿花瓣结构和色素成分对呈色的影响OA北大核心CSTPCD

Diverse flower color is an important characteristic of Meconopsis plants.In order to investigate the causes of petal color formation,three Meconopsis with different flower colors were used as materials to analyze the petal phenotypes and pigment distribution.UPLC-MS/MS technology was used to analyze the targeted metabolomics of anthocyanins,flavone,and carotenoids in three species of Meconopsis.The results showed that:The anthocyanins of the three species of Meconopsis mainly exist in epidermal cells,and the distributions of pigments in the upper and lower epidermis are relatively uniform.In addition,the upper and lower epidermal cells of Meconopsis have the same shape,both of which are flat and irregular rectangles.Metabolites of 59,63,and 99 kinds were detected in Meconopsis punicea,Meconopsis integrifolia,and Meconopsis wilsonii,respectively.The derivative of cyanidin is the main contributor for the red color of M.punicea petals,and catechins compounds are complementary to deepening color.Quercetin flavonol metabolites are the main reason for the formation of yellow flowers in M.integrifolia.The coloration of the petals of M.wilsonii is a result of three metabolic pathways:anthocyanins,flavone,and carotenoids.Glycosyltransferase is involved in the metabolic process of three species of Meconopsis,and the enzyme activity will affect the content of glycosides in Meconopsis.This study revealed the the coloration of flowers of different Meconopsis species,which not only lays a foundation for analyzing the mechanism of pigmentation in Meconopsis flowers,but also provides a theoretical basis for molecular breeding of flowers with various color.