摘要 : Red,purple and blue flower color is mainly due to anthocyanins.The color development and stability of anthocyanin are effected by co-existence of co-pigment and metal ions,and pH.Our chemical studies elucidated that the color is s... 展开 Red,purple and blue flower color is mainly due to anthocyanins.The color development and stability of anthocyanin are effected by co-existence of co-pigment and metal ions,and pH.Our chemical studies elucidated that the color is stabilized and varied by formation of a supramolecule.Especially beautiful blue flower colors,found in blue dayflower and blue salvia,are developed by a metalloanthocyanin,a stoichiometric supramolecular metal complex pigment.The metalloanthocyanins are composed with six molecules of anthocyanins,six molecules of glycosylflavones,and 2 atoms of metal ion and the diameter is ca.3 nano meter.Under formation of metalloanthocyanin fine chiral molecular recognition occurs.To clarify the mechanism we synthesized chiral glycosylflavones derivatives according to our newly invented method of direct C-and O-glycosylation to the flavonoid nucleus.Reproduction experiment from the components (anthocyanin,flavone and metal ion) including chiral isomer of the flavones bearing L-glucose was carried out.As a result,the 4'-D-glucoside of the flavone is essential for formation of metalloanthocyanin,but the L-sugar is not.As the petal tissue is not homogenous,both the epidermides are colored.For elucidation of true flower color development in a living petal cell,various analytical methodologies including nano-technology must be applied.For this purpose one cell analysis by pH-microelectrode,a nano-HPLC,a pico mole metal-analysis and microscopic photometry were carried out.The mechanism of flower color change of morning glory,Ipomoea tricolor,from purple to blue during blooming,and color variation of hydrangea was studied. 收起