花朵衰老过程中花瓣颜色和化学成分的变化。

Change of Petals' Color and Chemical Components in Flowers during Senescence.

机构信息

Graduate School of Informatics, Nagoya University, Chikusa, Nagoya 464-8601, Japan.

Research Institute for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.

出版信息

Molecules. 2018 Jul 12;23(7):1698. doi: 10.3390/molecules23071698.

flower petals change color during senescence. When in full bloom, the flowers of are white and those of and are yellow. However, the colors change to pink and orange, respectively, when the petals fade. We analyzed the flavonoid components in these petals as a function of senescence using HPLC-DAD and LC-MS. In all three species, cyanidin 3-glucoside (Cy3G) was found in faded petals. The content of Cy3G increased in senescence. In full bloom (0 h), no Cy3G was detected in any of the petals. However, after 12 h, the content of Cy3G in was 0.97 µmol/g fresh weight (FW) and the content of Cy3G in was 1.82 µmol/g FW. Together with anthocyanins, major flavonoid components in petals were identified. Quercitrin was detected in the petals of and isosalipurposide was found in the petals of and . The content of quercitrin did not change during senescence, but the content of isosalipurposide in increased from 3.4 µmol/g FW at 0 h to 4.8 µmol/g FW at 12 h. The color change in all three flowers was confirmed to be due to the de novo biosynthesis of Cy3G.

花瓣在衰老过程中会改变颜色。在盛开时，和的花为白色，和的花为黄色。然而，当花瓣凋谢时，颜色分别变为粉红色和橙色。我们使用 HPLC-DAD 和 LC-MS 分析了这些花瓣中类黄酮成分随衰老的变化。在这三个物种中，都发现花瓣中含有矢车菊素 3-葡萄糖苷（Cy3G）。Cy3G 的含量随着衰老而增加。在盛开时（0 小时），任何花瓣中都没有检测到 Cy3G。然而，在 12 小时后，的花瓣中 Cy3G 的含量为 0.97 µmol/g 鲜重（FW），的花瓣中 Cy3G 的含量为 1.82 µmol/g FW。与花青素一起，鉴定了花瓣中的主要类黄酮成分。和的花瓣中检测到槲皮苷，和的花瓣中发现异槲皮苷。衰老过程中槲皮苷的含量没有变化，但的花瓣中异槲皮苷的含量从 0 小时的 3.4 µmol/g FW 增加到 12 小时的 4.8 µmol/g FW。这三种花的颜色变化被确认为 Cy3G 的从头生物合成。