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. 2019 Aug 9;10:1017. doi: 10.3389/fpls.2019.01017

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Copyright © 2019 Stanley and Yuan

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Transcriptional regulation of CBP genes in roots. The regulation of CBP genes in root tissues. Icons indicate the species (carrot, cassava, maize, rice, and Arabidopsis). Developmental and environmental cues are shown in purple. The carotenoid biosynthesis pathway is shown in black, with carotenoid biosynthesis genes indicated in dark blue. Carotenoid regulators discussed in the paper are shown in light blue. Green arrows indicate positive regulation, while blunt red arrows indicate negative regulation. Dotted lines show indirect/unknown interactions.