Abstract
The GRAS gene family is a family of transcription factors that regulates plant growth and development. Despite being well-studied in many plant species, little is known about this gene family in orchardgrass (Dactylis glomerata L.), one of the top four economically important perennial forage grasses cultivated worldwide. We identified 46 GRAS genes in orchardgrass and analyzed their characteristics by phylogenetic, gene structural, motifs and expression patterns analysis. The phylogenetic analysis of eight species revealed that DgGRAS family had the evolutional conservation and closer homology relationship with the GRAS family of rice, barley and Brachypodium distachyon. Moreover, 46 DgGRAS proteins were divided into eight subfamilies based on the tree topology and rice or Arabidopsis classification, and LISCL subfamily was the largest one. Besides, we found that the motif 15 may be unique to the orchardgrass LISCL subfamily, and the motif 6 and motif 17 had indispensable functions in the orchardgrass LISCL subfamily. We further analyzed the expression profiles of DgGRAS genes at mature and seeding stage. And we found that DgGRAS17 played an important role in the growth and development no matter what stage it was at. DgGRAS5, DgGRAS28, DgGRAS31, DgGRAS42 and DgGRAS44 got involved in processes of the growth and development at seeding stage instead of mature stage. These results indicated that the major expression patterns and detailed functions of the DgGRAS genes varied with developmental stages. Taken together, this is the first systematic analysis of the GRAS gene family in the orchardgrass genome and the results provide insights into the potential functions of GRAS genes.
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This research work was funded by the earmarked fund for Modern Agro-industry Technology Research System (No. CARS-34), and the National Natural Science Foundation of China (NSFC 31872997).
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LH and XZ planned and designed the study. XX and GF wrote the manuscript and performed the experiments. ZY provided partial data basis. And all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Xu, X., Feng, G., Huang, L. et al. Genome-wide identification, structural analysis and expression profiles of GRAS gene family in orchardgrass. Mol Biol Rep 47, 1845–1857 (2020). https://doi.org/10.1007/s11033-020-05279-9
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DOI: https://doi.org/10.1007/s11033-020-05279-9