Abstract
Homeobox transcription factors have been implicated in filamentous growth, conidia formation and virulence in fungal pathogens. However, the presence of the homeobox gene family and their potential influence on pathogenesis in Fusarium pseudograminearum have not been investigated. F. pseudograminearum is an important plant pathogen that causes wheat and barley crown rot. In this study, we performed a genome-wide survey for F. pseudograminearum homeobox genes, and 11 FpHtfs were identified and characterized. Domain analyses revealed that all of these proteins contain a complete homeobox domain that contains three helices. Expression profiles of FpHtf genes at different pathogen stages showed that six FpHtf genes were induced during infection. Further, we generated and characterized FpHtf3 deletion mutants in F. pseudograminearum, showing it was essential for virulence. These results indicated that members of the homeobox gene family are likely involved in F. pseudograminearum pathogenicity. Our work also provides a useful foundation for further studies on the complexity and function of the homeobox gene family in F. pseudograminearum.
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This project is supported by Grants from the National Natural Science Foundation of China (U2004140 and 31961143018) and the Spcial Research and Development and Promotion Project of Henan Province (202102110226).
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LLC conceived and designed the research. LLC, MYM, WBC, JYZ, XJG and TLH performed the experiments and analyzed the data. SLD provided assistance for fungal infection. BJS contributed constructions. LLC wrote the paper. HLL revised the manuscript. All authors read and approved the final manuscript.
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Ma, Y., Zhao, J., Chen, W. et al. Identification and Characterization of the Homeobox Gene Family in Fusarium pseudograminearum Reveal Their Roles in Pathogenicity. Biochem Genet 60, 1601–1614 (2022). https://doi.org/10.1007/s10528-021-10150-y
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DOI: https://doi.org/10.1007/s10528-021-10150-y