Add time:08/03/2019         Source:sciencedirect.com

MYB transcription factors (TFs) have vital roles in regulating lignin or fiber development. Flax (Linum usitatissimum) is known as one of the plants with high fiber production capacity. However, no studies have been conducted to identify and characterize MYB TFs in the flax genome. Results showed that flax genome harbours 167 R2R3, seven 3R, and one 4R-type MYB TFs. 22 MYB genes (%13) were estimated to be tandem duplicated dated around 13.3–86.98 Mya. 130 flax MYB members have apparent orthologous with Arabidopsis, in which 17 R2R3 MYBs are associated with lignin biosynthesis. MYB062, MYB072, MYB096, MYB141, and MYB146 genes were up-regulated in tissues having higher lignin production capacity. In opposite, MYB012 and MYB113 genes were down-regulated which points out the involvement of those genes in the lignin biosynthesis mechanism. This comprehensive study can provide a basis for understanding the role of MYBs in fiber or lignin production in flax.

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