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Molecular cloning and expression profiling of multiple Dof genes of Sorghum bicolor (L) Moench

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Abstract

DNA binding with one finger (Dof) proteins represent a family of plant specific transcription factors associated with diverse biological processes, such as seed maturation and germination, phytohormone and light mediated regulation, and plant responses to biotic and abiotic stresses. In present study, a total of 21 Dof genes from Sorghum bicolor were cloned, sequenced and in silico characterized for homology search, revealing their identity to Dof like proteins. The expression profiling of SbDof genes using quantitative RT-PCR in different tissue types and also under drought and salt stresses was attempted. The SbDof genes displayed differential expression either in their transcript abundance or in their expression patterns under normal growth condition. Two of the SbDof genes namely SbDof8 and SbDof12 showed comparatively high level of transcript abundance in all the tissue types tested; whereas some of the SbDof genes showed a distinct tissue specific expression pattern. Further a total of 13 SbDof genes showed differential expression when subjected to either of the abiotic stress i.e. drought or salinity. Three of the SbDof genes namely SbDof12, SbDof19 and SbDof24 were found to be up-regulated in response to drought and salt stress. Comparative analysis of SbDof genes expression revealed existence of a complex transcriptional and functional diversity across plant growth and developmental stages.

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Acknowledgments

The authors acknowledge Head, Department of Biotechnology for providing infrastructural facilities. Prof. A. K. Tyagi, Director National Institute for Plant Genome Research, New Delhi is thankfully acknowledged for allowing SG to perform gene expression work. SG and GCA acknowledge Council of Scientific and Industrial Research for Senior Research fellowship. The author wishes to acknowledge Prof. P.K Shrotria, Department of Genetics and Plant Breeding, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand for providing the seeds of sorghum.

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Correspondence to Dinesh Yadav.

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Gupta, S., Arya, G.C., Malviya, N. et al. Molecular cloning and expression profiling of multiple Dof genes of Sorghum bicolor (L) Moench. Mol Biol Rep 43, 767–774 (2016). https://doi.org/10.1007/s11033-016-4019-6

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  • DOI: https://doi.org/10.1007/s11033-016-4019-6

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