How to colour a flower: on the optical principles of flower coloration.

ABSTRACT: The coloration of flowers is due to the wavelength-selective absorption by pigments of light backscattered by structures inside the petals. We investigated the optical properties of flowers using (micro)spectrophotometry and anatomical methods. To assess the contribution of different structures to the overall visual signal of flowers, we used an optical model, where a petal is considered as a stack of differently pigmented and structured layers and we interpreted the visual signals of the model petals with insect vision models. We show that the reflectance depends, in addition to the pigmentation, on the petal's thickness and the inhomogeneity of its interior. We find large between-species differences in floral pigments, pigment concentration and localization, as well as floral interior st

SUBMITTER: van der Kooi CJ 

PROVIDER: S-EPMC4874715 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature