Biologia Plantarum 63: 298-307, 2019 | DOI: 10.32615/bp.2019.034

Effect of aluminum and fluoride on R2R3-MYB transcription factor characterization and expression in Camellia sinensis

Y. Wang1, P. Chang1, J. Pan1, J. Zhu1, C. Cui1, X. Ye1, Y. Ma1, X. Zhu1, W. Fang1,*, C. Jiang2,*
1 College of Horticulture, Nanjing Agricultural University, Nanjing 210095, P.R.China
2 State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, P.R.China

Tea plant (Camellia sinensis) is a typical plant that accumulates abundant aluminum (Al) and fluoride (F). Al and F play vital roles in the growth and development in tea plant. MYB (myeloblastosis) is one of the largest transcription factor families in plant, which plays an important role in the stress responses. As the largest and multifunctional subfamily of MYB, R2R3-MYB subfamily participates in multiple abiotic stresses in plant. However, there are few studies about R2R3-MYB in tea plant, especially in the accumulation of Al and F during its growth. Here, we identified 43 CsMYB genes from the transcriptome database of tea plant and analyzed the relative expression in Al and F treatments. According to the Arabidopsis thaliana classification, 43 CsMYB genes are divided into 18 subgroups via phylogenetic tree analysis. All 43 CsMYB proteins have the typical R2R3-MYB domain by MEME prediction. Moreover, 9 CsMYB genes (CsMYB11, CsMYB17, CsMYB29, CsMYB38 to CsMYB43) that related to abiotic stress were selected from 43 CsMYB genes for a further study, and the relative expressions showed that they are tissue-specifically expressed. In addition, the results of different concentrations of Al treatments showed that CsMYB11, -17, -29, -38 and -41 are stimulated by Al treatment. The results of different concentrations of F treatments showed that the CsMYB11, -17, -38, -39, -40, -41, -42 and -43 participate in F accumulation of C. sinensis roots. Our research establishes a solid foundation for further investigation into the molecular functions of R2R3-MYB transcription factors in C. sinensis.

Keywords: Arabidopsis thaliana, phylogenetic tree, stress response, tea growth and development

Accepted: December 8, 2018; Prepublished online: December 8, 2018; Published online: January 19, 2019Show citation

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Wang, Y., Chang, P., Pan, J., Zhu, J., Cui, C., Ye, X., ... Jiang, C. (2019). Effect of aluminum and fluoride on R2R3-MYB transcription factor characterization and expression in Camellia sinensis. Biologia plantarum, 63, 298-307. doi: 10.32615/bp.2019.034.
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