Re: HYB: Abbey Road pigments (was on photos)

It is precisely this mix of alcohol/water that makes me think that the pigment is not an oil based but a result of the emulsion. Linda was able to extract a yellow pigment with water alone which means that there was a water based yellow pigment present. In my own extractions. a light cream colour was either a weak oil based or a water based pigment. When I get  both it is usually a light yellow flower , but a bit darker and with a slight greenish-yellow tint. Linda did get an extract using water alone.

I have had several glaciatas with this pigmentation, (light cream over white) as have several other people who have posted their photos on iris-photos, that  I was starting to think that is is so common with glaciatas  that perhaps that that was only were it was seen, but it seems that it also can be in other plants. The particular shading of light yellow over white is of a certain shading  that is noticable distinct to my eye. 

I haven't seen the cream border on the falls in the photos but perhaps it is only noticable in person, if so it would be the telling factor.

Chuck Chapman 
>
>Date: Fri, 13 May 2005 12:37:06 -0400
>From: "Neil A Mogensen" <neilm@charter.net>
>Subject: [iris] Re: HYB: Abbey Road pigments (was on photos)
>
>Chuck, based on the ancestry of Abbey Road, the idea that this is most
>likely a carotenoid is suggested by the pigment distribution in the pod
>parent, GANGES MOON.  It is a cream colored "Joyce Terry" pattern.  The
>falls are described as white with a 1" border band of the color of the
>standards.
>
>This heritage shows in Abbey Road to a degree, as there is a lighter area
>around the beard.
>
>The white fall banded yellow (or cream, ivory, pink or apricot) is a pattern
>frequently encountered, and, as noted, appears in both yellow and "t"
>bearded sorts.  I don't recall any yellow glaciatas that have the pattern
>(I'm sure they probably exist), but I know it is encountered in derivitives
>of brown breeding, and is especially prevalent in those having tangerine
>bearded ancestries.  I looked only at a couple of generations of the family
>tree of ABBEY ROAD and had not yet run into any.  The color-tone of the
>variety sure does suggest pink, however.
>
>I would hazard a suggestion that this is a main-line Carotene or mix of
>alpha- and beta- Carotene.  The odd results are likely the effect of the
>water-alcohol mix that constitutes "alcohol" normally as purchased in
>drugstores.  The solution has the ability to allow water and paraffin series
>compounds to mix.
>
>That's why we can on occasion put a bottle of rubbing alcohol into the gas
>tank if a little water has condensed in the tank. The gasoline and water go
>into the solution mediated by the alcohol molecules.
>
>Carotenoids in a water-isopropyl alcohol-oil mix might first mix in the
>three-way solution, but when heated to evaporate out the alcohol the
>location would change.  Surely the carotenoid fraction would separate from
>any flavonoids by ending up in the oil only.  The flavonoids would be in the
>water layer.  Just where the xanthophylls end up I'm not sure.  Are they not
>carotenoid-derived?
>
>Neil Mogensen
>
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