绣球花的变色机理及化学模型

Chemical Model and Mechanism of Hydrangea Macrophylla Color-Changing

绣球花品种繁多,花型饱满,是深受大众喜爱的园林景观植物。有趣的是,绣球花萼片中仅含一种花色苷——飞燕草素-3-葡萄糖苷,却能产生从红到蓝的系列颜色变化。研究发现,引起绣球花萼片颜色变化的密钥为Al^(3+),萼片中的共色素也对花色调控有重要作用。为探究绣球花萼片颜色从红到蓝的变化机理,生物化学家们提出了花色变化的化学模型,并通过分析仪器成功测定了引起萼片蓝化的金属络合物的结构。

Hydrangea macrophylla is an important landscape plant,for its varieties and showy inflorescences.Interestingly,the sepal of hydrangea contains only one anthocyanin,delphinin-3-glucose,which produces a series of color-changing from red to blue.It’s found that the key role in the color-changing of hydrangea sepals is Al^(3+),while co-pigment contained in sepals also plays an important role.In order to clarify the mechanism of color-changing from red to blue,biochemists proposed a chemical model,and successfully measured the structure of metal-anthocyanin complex which caused the blue-color of sepals.