期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 172, 期 -, 页码 250-262出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.01.053
关键词
Ginkgo; R2R3-MYB transcription factor; Expression pattern; Evolution
资金
- China Postdoctoral Science Foundation [2018M642261]
- Natural Science Fund for Colleges and Universities in Jiangsu Province [19KJB220002]
- Postdoctoral Science Foundation of Jiangsu Province [2018K197C]
- National Key Research and Development Program of China [2017YFD0600700]
- National Science Foundation of China [31971689]
In this study, 69 GbR2R3-MYB genes were identified and classified into 33 groups based on their amino acid sequence and gene structure characteristics. Expression profiling in different tissues and developmental stages revealed temporal and spatial expression patterns, with specific genes showing responses to abiotic stresses and hormonal exposures. The investigation of GbR2R3-MYB19 indicated its nuclear localization and transcriptional activity, suggesting potential roles in the regulation of biological processes.
As one of the largest families of transcription factors, the R2R3-MYB family plays a significant role in plant growth, development, and response to hormone and environmental stress. To explore its evolutionary mechanism and potential function in Ginkgo biloba, a gymnosperm of great economic and ecological value, we presented a comprehensive analysis of the R2R3-MYB genes in ginkgo. Sixty-nine GbR2R3-MYB genes were identified and these genes could be classified into 33 groups based on the characteristics of the amino acid sequence of the R2R3-MYB domain and gene structure. Syntenic analyses indicated that few tandem and segmental duplications possibly resulted in the contraction of the GbR2R3-MYB gene family. Based on the transcriptome data, expression profiles of eight different tissues and different developmental stages of leaf and kernel showed that GbR2R3-MYB genes had distinct temporal and spatial expression characteristics. Specific expression patterns of the sixteen GbR2R3-MYB genes were also identified in response to different abiotic stresses and hormonal exposures. Further investigation revealed that GbR2R3-MYB19 was located in the nucleus and possessed transcriptional activity, implying its potential roles in the regulation of multiple biological processes. Our findings provide a robust basis for future comprehensive evolutionary and functional analyses of GbR2R3-MYB genes in ginkgo. (C) 2018 Elsevier B.V. All rights reserved.
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