The meaning of purely structural colour: white plumage reflectance indicates feather condition

Ibis ◽  
2020 ◽  
Author(s):  
Miklós Laczi ◽  
Julia Balogh ◽  
Xavier Nardou ◽  
János Török ◽  
Gergely Hegyi
Keyword(s):  
Structural Colour ◽  
White Plumage ◽  
Plumage Reflectance

Seasonal changes in a ultraviolet structural colour signal in blue tits, Parus caeruleus

2002 ◽  
Vol 76 (2) ◽  
pp. 237-245 ◽  
Author(s):  
JONAS ORNBORG ◽  
STAFFAN ANDERSSON ◽  
SIMON C. GRIFFITH ◽  
BEN C. SHELDON
Keyword(s):  
Seasonal Changes ◽  
Parus Caeruleus ◽  
Structural Colour ◽  
Blue Tits ◽  
Colour Signal

scholarly journals Introducing structural colour in DSCs by using photonic crystals: interplay between conversion efficiency and optical properties

2012 ◽  
Vol 5 (8) ◽  
pp. 8238 ◽  
Author(s):  
Daniele Colonna ◽  
Silvia Colodrero ◽  
Henrik Lindström ◽  
Aldo Di Carlo ◽  
Hernán Míguez
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Conversion Efficiency ◽  
Structural Colour

scholarly journals CRISPR knockouts of pmela and pmelb engineered a golden tilapia by regulating relative pigment cell abundance

2021 ◽  
Author(s):  
Chenxu Wang ◽  
Jia Xu ◽  
Thomas D. Kocher ◽  
Minghui Li ◽  
Deshou Wang
Keyword(s):  
Pigment Cell ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Homozygous Mutation ◽  
Body Color ◽  
Wild Type ◽  
Double Mutation ◽  
Vertical Bars ◽  
White Plumage ◽  
New Strategies

Premelanosome protein (pmel) is a key gene for melanogenesis in vertebrates. Mutations in this gene are responsible for white plumage in chicken, but its role in pigmentation of fish remains to be demonstrated. In this study we found that most fishes have two pmel genes arising from the teleost-specific whole genome duplication. Both pmela and pmelb were expressed at high levels in the eyes and skin of Nile tilapia. We mutated both genes in tilapia using CRISPR/Cas9 gene editing. Homozygous mutation of pmela resulted in yellowish body color with weak vertical bars and a hypo-pigmented retinal pigment epithelium (RPE) due to significantly reduced number and size of melanophores. In contrast, we observed an increased number and size of xanthophores in mutants compared to wild-type fish. Homozygous mutation of pmelb resulted in a similar, but milder phenotype than pmela -/- mutants, without effects on RPE pigmentation. Double mutation of pmela and pmelb resulted in loss of additional melanophores compared to the pmela -/- mutants, and also an increase in the number and size of xanthophores, producing a strong golden body color without bars in the trunk. The RPE pigmentation of pmela -/ - ;pmelb -/- was similar to pmela -/- mutants, with much less pigmentation than pmelb -/- mutants and wild-type fish. Taken together, our results indicate that, while both pmel genes are important for the formation of body color in tilapia, pmela plays a more important role than pmelb. To our knowledge, this is the first report on mutation of pmelb or both pmela;pmelb in fish. Studies on these mutants suggest new strategies for breeding golden tilapia, and also provide a new model for studies of pmel function in vertebrates.

scholarly journals Seasonal changes in a ultraviolet structural colour signal in blue tits, Parus caeruleus

2008 ◽  
Vol 76 (2) ◽  
pp. 237-245 ◽  
Author(s):  
JONAS ÖRNBORG ◽  
STAFFAN ANDERSSON ◽  
SIMON C. GRIFFITH ◽  
BEN C. SHELDON
Keyword(s):  
Seasonal Changes ◽  
Parus Caeruleus ◽  
Structural Colour ◽  
Blue Tits ◽  
Colour Signal

scholarly journals Phenotypic variation in Heliconius erato crosses shows that iridescent structural colour is sex-linked and controlled by multiple genes

2018 ◽  
Vol 9 (1) ◽  
pp. 20180047 ◽  
Author(s):  
Melanie N. Brien ◽  
Juan Enciso-Romero ◽  
Andrew J. Parnell ◽  
Patricio A. Salazar ◽  
Carlos Morochz ◽  
...  
Keyword(s):  
Phenotypic Variation ◽  
Genetic Basis ◽  
Sex Chromosome ◽  
Scattering Data ◽  
Colour Pattern ◽  
Structural Colour ◽  
X Ray Scattering ◽  
Multiple Genes ◽  
Colour Patterns ◽  
Blue Reflectance

Bright, highly reflective iridescent colours can be seen across nature and are produced by the scattering of light from nanostructures. Heliconius butterflies have been widely studied for their diversity and mimicry of wing colour patterns. Despite iridescence evolving multiple times in this genus, little is known about the genetic basis of the colour and the development of the structures which produce it. Heliconius erato can be found across Central and South America, but only races found in western Ecuador and Colombia have developed blue iridescent colour. Here, we use crosses between iridescent and non-iridescent races of H. erato to study phenotypic variation in the resulting F 2 generation. Using measurements of blue colour from photographs, we find that iridescent structural colour is a quantitative trait controlled by multiple genes, with strong evidence for loci on the Z sex chromosome. Iridescence is not linked to the Mendelian colour pattern locus that also segregates in these crosses (controlled by the gene cortex ). Small-angle X-ray scattering data show that spacing between longitudinal ridges on the scales, which affects the intensity of the blue reflectance, also varies quantitatively in F 2 crosses.

Electrothermally driven structural colour based on liquid crystal elastomers

2012 ◽  
Vol 22 (24) ◽  
pp. 11943 ◽  
Author(s):  
Yin Jiang ◽  
Dan Xu ◽  
Xuesong Li ◽  
Changxu Lin ◽  
Weina Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Structural Colour ◽  
Liquid Crystal Elastomers

Tunable structural colour

2009 ◽  
Vol 3 (10) ◽  
pp. 551-553 ◽  
Author(s):  
Duncan Graham-Rowe
Keyword(s):  
Structural Colour

scholarly journals Iridescent cellulose nanocrystal films: the link between structural colour and Bragg’s law

2018 ◽  
Vol 39 (4) ◽  
pp. 045803 ◽  
Author(s):  
Thanh-Dinh Nguyen ◽  
Egoitz Sierra ◽  
Harkaitz Eguiraun ◽  
Erlantz Lizundia
Keyword(s):  
Cellulose Nanocrystal ◽  
Structural Colour ◽  
Nanocrystal Films

scholarly journals Diffusive structural colour in Hoplia argentea

2019 ◽  
Vol 222 (24) ◽  
pp. jeb213306
Author(s):  
Cédric Kilchoer ◽  
Primož Pirih ◽  
Ullrich Steiner ◽  
Bodo D. Wilts
Keyword(s):  
Structural Colour
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