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Characterization of the heterotrimeric G protein gene families in Triticum aestivum and related species

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Abstract

This study characterizes the heterotrimeric G protein gene families in Triticum aestivum, their tissue-specific expression patterns during development and in response to biotic and abiotic stress conditions. There are three genes, three and 12 genes, totaling 18 genes encoding heterotrimeric G proteins in the hexaploid wheat genome. Each haploid genome of the hexaploid T. aestivum has a single gene encoding the α subunit of the heterotrimeric G protein complex, GA1, a single and four genes. Each gene has three homeologous copies in the A, B and D genomes. The physical interaction between the Gβ (Gpb) and two Gγ subunits, Gpg1 and Gpg2, was shown through bimolecular fluorescence complementation (BiFC). The gene expression in response to biotic and abiotic stresses showed both up-regulation and down-regulation of members of the gene families. Gγ2-B and Gγ2-D are significantly upregulated during heat stress, GA1-D is upregulated by cold stress and Gγ1-A and Gγ1-D were upregulated by Fusarium graminearum inoculation in a F. graminearum resistant cultivar. This suggests that these members may play roles in biotic and abiotic signaling pathways and the roles of these genes within these pathways need further investigation.

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Availability of data and material

Nucleotide sequences for the CDS and protein sequences from T. aestivum are included as supplementary material, and GenBank accession numbers are listed in the tables of the manuscript.

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Acknowledgements

We would like to thank Dr. Alan Jones, North Carolina State University for the gift of the PCL YFP BiFC Constructs. The authors acknowledge the Centre for Microscopy and Cellular Imaging (CMCI) funded by Concordia University, Montreal, Canada, and the Canada Foundation for Innovation.

Funding

This work is supported by grants from Indian Council of Agricultural Research, India, the Natural Science and Engineering Research Council of Canada, and the Concordia University Faculty of Arts and Science (Grant RGPIN/667-2016).

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NDG, ZH, and SCB carried out the bioinformatic analysis, NDG carried out the BiFC assays and wrote the initial draft of the manuscript, ZH carried out laboratory analysis of different wheat cultivars. PJG conceived and directed the research. All authors contributed to the preparation of the manuscript.

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Correspondence to Patrick J. Gulick.

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The authors declare there is no conflict of interest in the publication.

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Gawande, N.D., Hamiditabar, Z., Brunetti, S.C. et al. Characterization of the heterotrimeric G protein gene families in Triticum aestivum and related species. 3 Biotech 12, 99 (2022). https://doi.org/10.1007/s13205-022-03156-9

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  • DOI: https://doi.org/10.1007/s13205-022-03156-9

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