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. 2021 May 3;22(9):4838. doi: 10.3390/ijms22094838

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The expression and promoter analysis of 7 PaMYB genes that contained flavonoid biosynthetic regulation elements: (A) Heatmap showed the expression pattern of 5 PaMYBs in different coloration stage of white and purple petunia. S1 indicates budding period, S2 indicates extension period, S3 indicates blooming period; (B) The pictures of white and purple flowers; (C) The distribution of flavonoid biosynthetic regulation elements in 7 MYB genes. Green box indicates the flavonoid biosynthetic regulation elements.