Re: RE: Hybd- Pink and yellow

Chuck

I'd love to hear more of your experiments. I've wanted to do some TLC (thin
layer chromatography) of pigments but the plates are a bit hard to come by
and expensive. Could use blotting paper I suppose but not such good
resolution. Any excuse to be a chemist again. What are you using?

Colleen Modra
Adelaide Hills
South Australia  Zone 8/9

colleen@impressiveirises.com.au
www.impressiveirises.com.au



----- Original Message ----- 
From: <irischapman@netscape.net>
To: <iris@hort.net>
Sent: Monday, July 19, 2004 8:30 AM
Subject: [iris] RE: Hybd- Pink and yellow


> To correct a common misconception.
> In the chain of chemical reactions, lycopene (pink colour) comes before
the carotene (yellow). The "t" gene in four dosages, prevents the lycopene
from converting to carotene.  I have in front of me some recent articles on
cartotenoid pigment development. Allthough I'm struggling with all of the
terms and information, it is very clear that lycopene develops before the
carotenes and that the suppression of this conversion leaves pink as the
colour. This suppression is at times not complete, giving us the orange
colour which is a combination of lycopene (pink) and beta carotene (yellow)
>
> I have been doing some interesting kitchen lab experiments on these
pigments and their distribution this year when flowers were in bloom.  Much
new and interesting data to be forthcomming.  Including a yellow pigment
that is water soluble (not a carotene) Hope to get out articles both on
Kitchen lab techniques that can be done by anyone and  on some of what I
have found.
>
> Chuck Chapman
>
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