Материал из Антэкология /// Anthecology
The Nature of the White Colour of Petals
Whiteness in flowers has been ascribed to reflection of light or to the presence of flavones in the tissue. Light reflection from the surface of chrysanthemum petals and the pigment content of the petals were determined before and after various treatments. After squashing or infiltration of the petals with water, light reflection was reduced to half or less, whereas flavone content remained almost unimpaired. Further reductions in light reflection were obtained by removing the cuticle. An albino Antirrhinum was white in colour, yet contained no flavone. These results are discussed and it is concluded that whiteness is due to reflection of light, particularly by the surfaces round air spaces.
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