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Old May 22, 2016   #31
Darren Abbey
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An idea might be to define a time point for harvesting fruit samples to examine. Something like 1 day after color break, 3 days, etc. This would help to minimize the impact of changes over time.
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Old May 24, 2016   #32
frogsleap farm
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I think a likely explanation is yellow skin with dark red pigmentation of in the sub-cuticular layer that can cling to the cuticle when it is stripped off. I have seen this in one of my yellow fleshed breeding lines. This seems more likely than novel expression of lycopene in the cuticle per se - but who knows?



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Originally Posted by Minnesota Mato View Post
Not sure what is going on. I left a tomato on even longer and after days of being orange it started looking pretty red. I just picked it and took it out in the sun so I could get a true color. The sub epidermis is dark red and the skin looks orange to me. The flesh looks more pink then orange to me so I have no idea what is going on. My f2 plants are already coming up and I have no idea what I am looking for now.
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Old May 27, 2016   #33
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I think this is an interesting question. Another thought; since carotenoid pigments are synthesized and stored in chromoplasts (derived from chloroplasts), and chloroplasts are largely absent in the epidermis - it seems unlikely that lycopene, or any other carotenoid pigment, will be accumulated in the epidermis. Although pigmentation of the sub-epidermis seems not to be well understood, it seems this is the more likely source of the "red skin" phenomenon.
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