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J R Soc Interface. 2016 Nov;13(124). pii: 20160645. doi: 10.1098/rsif.2016.0645.

Structural colour from helicoidal cell-wall architecture in fruits of Margaritaria nobilis.

Author information

1
Chemistry Department, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK sv319@cam.ac.uk.
2
Royal Botanic Gardens Kew, Richmond, Surrey TW9 3AB, UK.
3
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA.
4
Thin Film Photonics, School of Physics, Exeter University, Exeter EX4 4QL, UK.
5
Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK.
6
Adolphe Merkle Institute, Chemin des Verdiers 4, 1700 Fribourg, Switzerland.

Abstract

The bright and intense blue-green coloration of the fruits of Margaritaria nobilis (Phyllanthaceae) was investigated using polarization-resolved spectroscopy and transmission electron microscopy. Optical measurements of freshly collected fruits revealed a strong circularly polarized reflection of the fruit that originates from a cellulose helicoidal cell wall structure in the pericarp cells. Hyperspectral microscopy was used to capture the iridescent effect at the single-cell level.

KEYWORDS:

cellulose; circular dichroism; helicoidal cell wall; iridescence; natural photonics; structural colour

PMID:
28334698
PMCID:
PMC5134016
DOI:
10.1098/rsif.2016.0645
[Indexed for MEDLINE]
Free PMC Article

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