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Dissecting the Genome-Wide Evolution and Function of R2R3-MYB Transcription Factor Family in Rosa chinensis.


ABSTRACT: Rosa chinensis, an important ancestor species of Rosa hybrida, the most popular ornamental plant species worldwide, produces flowers with diverse colors and fragrances. The R2R3-MYB transcription factor family controls a wide variety of plant-specific metabolic processes, especially phenylpropanoid metabolism. Despite their importance for the ornamental value of flowers, the evolution of R2R3-MYB genes in plants has not been comprehensively characterized. In this study, 121 predicted R2R3-MYB gene sequences were identified in the rose genome. Additionally, a phylogenomic synteny network (synnet) was applied for the R2R3-MYB gene families in 35 complete plant genomes. We also analyzed the R2R3-MYB genes regarding their genomic locations, Ka/Ks ratio, encoded conserved motifs, and spatiotemporal expression. Our results indicated that R2R3-MYBs have multiple synteny clusters. The RcMYB114a gene was included in the Rosaceae-specific Cluster 54, with independent evolutionary patterns. On the basis of these results and an analysis of RcMYB114a-overexpressing tobacco leaf samples, we predicted that RcMYB114a functions in the phenylpropanoid pathway. We clarified the relationship between R2R3-MYB gene evolution and function from a new perspective. Our study data may be relevant for elucidating the regulation of floral metabolism in roses at the transcript level.

SUBMITTER: Han Y 

PROVIDER: S-EPMC6826493 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Dissecting the Genome-Wide Evolution and Function of R2R3-MYB Transcription Factor Family in <i>Rosa chinensis</i>.

Han Yu Y   Yu Jiayao J   Zhao Tao T   Cheng Tangren T   Wang Jia J   Yang Weiru W   Pan Huitang H   Zhang Qixiang Q  

Genes 20191018 10


<i>Rosa chinensis</i>, an important ancestor species of <i>Rosa hybrida</i>, the most popular ornamental plant species worldwide, produces flowers with diverse colors and fragrances. The R2R3-MYB transcription factor family controls a wide variety of plant-specific metabolic processes, especially phenylpropanoid metabolism. Despite their importance for the ornamental value of flowers, the evolution of <i>R2R3-MYB</i> genes in plants has not been comprehensively characterized. In this study, 121  ...[more]

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