Forum area for discussing hybridizing tomatoes in technical terms and information pertinent to trait/variety specific long-term (1+ years) growout projects.
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May 22, 2016 | #31 |
Tomatovillian™
Join Date: Jun 2012
Location: Minnesota
Posts: 586
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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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May 24, 2016 | #32 | |
Tomatovillian™
Join Date: Nov 2008
Location: Minnesota
Posts: 568
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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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May 27, 2016 | #33 |
Tomatovillian™
Join Date: Nov 2008
Location: Minnesota
Posts: 568
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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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