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Molecules 2018, 23(7), 1698; https://doi.org/10.3390/molecules23071698

Change of Petals′ Color and Chemical Components in Oenothera Flowers during Senescence

1
Graduate School of Informatics, Nagoya University, Chikusa, Nagoya 464-8601, Japan
2
Research Institute for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Tsukasa Iwashina and Thomas J. Schmidt
Received: 26 May 2018 / Revised: 9 July 2018 / Accepted: 9 July 2018 / Published: 12 July 2018
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Abstract

Oenothera flower petals change color during senescence. When in full bloom, the flowers of O. tetraptera are white and those of O. laciniata and O. stricta 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 O. tetraptera was 0.97 µmol/g fresh weight (FW) and the content of Cy3G in O. laciniata was 1.82 µmol/g FW. Together with anthocyanins, major flavonoid components in petals were identified. Quercitrin was detected in the petals of O. tetraptera and isosalipurposide was found in the petals of O. laciniata and O. stricta. The content of quercitrin did not change during senescence, but the content of isosalipurposide in O. laciniata 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 Oenothera flowers was confirmed to be due to the de novo biosynthesis of Cy3G. View Full-Text
Keywords: cyanidin 3-O-glucoside; flower senescence; isosalipurposide; Oenothera; petal color change; quercitrin cyanidin 3-O-glucoside; flower senescence; isosalipurposide; Oenothera; petal color change; quercitrin
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Teppabut, Y.; Oyama, K.-I.; Kondo, T.; Yoshida, K. Change of Petals′ Color and Chemical Components in Oenothera Flowers during Senescence. Molecules 2018, 23, 1698.

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