Blue metal complex pigments involved in blue flower color

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概要

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• The blue pigment of cornflower, protocyanin, has been investigated for a long time, but its precise structure was not entirely explained until recently. The molecular structure of the pigment was recently shown to be a metal complex of six molecules each of anthocyanin and flavone glycoside, with one ferric iron, one magnesium and two calcium ions by X-ray crystallographic analysis. The studies provided the answer to the question posed in the early part of the last century, "why is the cornflower blue and rose red when both flowers contain the same anthocyanin?" This work was achieved on the basis of the results of long years of the studies made by many researchers. In this review, the author focuses on the investigations of the blue metal complex pigments involved in the bluing of flowers, commelinin from Commelina commusis, protocyanin from Centaurea cyanus, protodelphin from Salvia patens and hydrangea blue pigment. (Communicated by Shoji SHIBATA, M.J.A.)

• 日本学士院の論文

著者

• Takeda Kosaku

  Tokyo Gakugei Univ.

• TAKEDA Kosaku

  Emeritus Professor, Tokyo Gakugei University

関連論文

• Flower color variation, especially on blue flower colors
• Structure of commelinin, a blue complex pigment from the blue flowers of Commelina communis
• THE CORRELATIONS BETWEEN THE PHENOLICS CONTENTS AND UV-MEDIATED DNA DAMAGE AND REPAIR ABILITY IN PLANTAGO ASIATICA
• Blue metal complex pigments involved in blue flower color
• Flavonoids in the flowers of some Centaurea species (Asteraceae)

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