Vividly coloured poppy flowers due to dense pigmentation and strong scattering in thin petals

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Abstract

The flowers of poppies (Papaveraceae) exhibit bright colours, despite their thin and floppy petals. We investigated the optical properties of flowers of Papaver rhoeas, P. dubium, Meconopsis cambrica and Argemone polyanthemos using a combined approach of anatomy, spectrophotometry and optical modelling. The petals of Papaver flowers are composed of only three cell layers, an upper and lower epidermal layer, which are densely filled with pigment, and an unpigmented mesophyll layer. Dense pigmentation together with strong scattering structures, composed of serpentine cell walls and air cavities, cause the striking poppy colours. We discuss how various aspects of the optical signal contribute to the flower's visibility to pollinators.

Original languageEnglish
Pages (from-to)363-372
Number of pages10
JournalJournal of Comparative Physiology A
Volume205
Issue number3
Early online date28-Jan-2019
DOIs
Publication statusPublished - Jun-2019

Keywords

  • Papaver
  • Pollination
  • Anthocyanin
  • Bee vision
  • Reflectance
  • POLLINATION
  • PLANTS

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