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Phenotypes of tomato fruits from transplastomic tomato plants expressing lycopene β-cyclase transgenes. Fruits from a wild-type plant (S.l.-wt), an S.l.-pEcrtY line, and an S.l.-pNLyc line were harvested at different ripening stages and photographed from the side (top row) and from the bottom (bottom row). The orange color of ripe S.l.-pNLyc fruits indicates efficient conversion of red lycopene into orange β-carotene (provitamin A).
