turacoverdin การใช้

• Turacoverdin is one chemical which can cause a green hue in birds, especially.
• The green colour in turacos comes from turacoverdin, the only true green pigment in birds known to date.
• This makes it highly unlikely that turacoverdin in " Jacana " reflects common ancestry with either turacos or galliforms.
• If the green pigment in " Jacana " is truly turacoverdin, then the pigment must have evolved independently in this order.
• Other authors speculate that turacos and other birds employing the use of turacoverdin may derive a physiological and biochemical benefit from synthesizing the pigment.
• The incidence of turacoverdin in relation to habitat is of interest to scientists, being present in forest species but absent in savanna and acacia living species.
• Both pigments are derived from porphyrins and only known from the Musophagidae at present, but especially the little-researched turacoverdin might have relatives in other birds.
• It also may be of some biological significance that turacos all seem to be pigmented with turacin and turacoverdin in exactly the same regions of the wing feathers.
• This has caused several researchers to suggest that turacoverdin may be an absorbance curve, which peaks at blue wavelengths and in the long-wave range above yellow.
• It contains the " typical " or "'green turacos "'; though their plumage is not always green all over, the presence of significant amounts of turacoverdin-colored plumage generally sets " Tauraco " species apart from other Musophagidae.
• As " Ithaginis " and " Rollulus " are members of the order Galliformes, this has led some researchers to assume support for a turacoverdin-bearing common ancestor of Musophagidae and Galliformes, making the presence of the pigment a symplesiomorphy for these groups.
• Recent spectrophotometric evidence suggests that turacoverdin may be closely related or identical to green pigments in the feathers of the northern jacana ( " Jacana spinosa " ), the blood pheasant ( " Ithaginis cruentus " ), and the crested wood-partridge ( " Rollulus rouloul " ).
• Most feather pigments are melanins ( brown and beige pheomelanins, black and grey eumelanins ) and carotenoids ( red, yellow, orange ); other pigments occur only in certain taxa  the yellow to red psittacofulvins ( found in some parrots ) and the red turacin and green turacoverdin ( porphyrin pigments found only in turacos ).