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Open AccessArticle

Systematic Analysis of MYB Family Genes in Potato and Their Multiple Roles in Development and Stress Responses

by Xiaoxu Li 1,2,†, Cun Guo 1,3,†, Salman Ahmad 1, Qi Wang 1,3, Jing Yu 1, Cheng Liu 1 and Yongfeng Guo 1,*
1
Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
2
Technology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha 410007, China
3
Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Biomolecules 2019, 9(8), 317; https://doi.org/10.3390/biom9080317
Received: 21 June 2019 / Revised: 18 July 2019 / Accepted: 26 July 2019 / Published: 30 July 2019
(This article belongs to the Section Bioinformatics and Systems Biology)
The MYB proteins represent a large family of transcription factors and play important roles in development, senescence, and stress responses in plants. In the current study, 233 MYB transcription factor-encoding genes were identified and analyzed in the potato genome, including 119 R1-MYB, 112 R2R3-MYB, and two R1R2R3-MYB members. R2R3-MYB is the most abundant MYB subclass and potato R2R3-MYB members together with their Arabidopsis homologs were divided into 35 well-supported subgroups as the result of phylogenetic analyses. Analyses on gene structure and protein motif revealed that members from the same subgroup shared similar exon/intron and motif organization, further supporting the results of phylogenetic analyses. Evolution of the potato MYB family was studied via syntenic analysis. Forty-one pairs of StMYB genes were predicted to have arisen from tandem or segmental duplication events, which played important roles in the expansion of the StMYB family. Expression profiling revealed that the StMYB genes were expressed in various tissues and several StMYB genes were identified to be induced by different stress conditions. Notably, StMYB030 was found to act as the homolog of AtMYB44 and was significantly up-regulated by salt and drought stress treatments. Furthermore, overexpression of StMYB030 in Arabidopsis enhanced salt stress tolerance of transgenic plants. The results from this study provided information for further functional analysis and for crop improvements through genetic manipulation of these StMYB genes. View Full-Text
Keywords: potato; MYB; biotic stress; abiotic stress; leaf senescence potato; MYB; biotic stress; abiotic stress; leaf senescence
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Li, X.; Guo, C.; Ahmad, S.; Wang, Q.; Yu, J.; Liu, C.; Guo, Y. Systematic Analysis of MYB Family Genes in Potato and Their Multiple Roles in Development and Stress Responses. Biomolecules 2019, 9, 317.

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