Ultrastructural basis and function of iridescent blue colour of fruits inElaeocarpus (original) (raw)

Nature volume 349, pages 260–262 (1991)Cite this article

Abstract

IRIDESCENT colour, caused by physical effects (thin-film interference, diffraction and Tyndall scattering), is relatively common in animals but exceedingly rare among plants1. Some benthic marine algae produce blue to violet iridescence2,3, and the upper leaf surfaces of a few vascular plants from the shady environments of humid tropical forests are iridescent blue4–6. Blue fruit colour has been assumed to be caused by anthocyanins7. A survey of such fruits (26 species in 18 genera) in Costa Rica, India, Florida and Malaysia, showed this to be the case, except for the iridescent colour in fruits of Elaeocarpus angustifolius Blume (Elaeocarpaceae). There I show that the colour is caused by a remarkable structure in the epidermis, and provide evidence for its selective advantage.

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  1. Department of Biological Sciences, Florida International University, University Park, Miami, Florida, 33199
    David W. Lee
  2. Fairchild Tropical Garden, Miami, Florida, 33156, USA
    David W. Lee

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Lee, D. Ultrastructural basis and function of iridescent blue colour of fruits in_Elaeocarpus_.Nature 349, 260–262 (1991). https://doi.org/10.1038/349260a0

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