Abstract
Peroxisomes are ubiquitous single-membrane-bound organelles that perform a variety of biochemical functions in eukaryotic cells. Proteins involved in peroxisomal biogenesis are collectively called peroxins. Currently, functions of most peroxins in phytopathogenic fungi are poorly understood. Here, we report identification of PEX1 and PEX10 in the phytopathogenic fungus, Fusarium graminearum, namely FgPEX1 and FgPEX10, the orthologs of yeast ScPEX1 and ScPEX10. To functionally characterize FgPEX1 and FgPEX10, we constructed deletion mutants of FgPEX1 and FgPEX10 (ΔPEX1 and ΔPEX10) by targeting gene-replacement strategies. Our data demonstrate that both mutants displayed reduced mycelial growth, conidiation, and production of perithecia. Deletion of FgPEX1 and FgPEX10 resulted in a shortage of acetyl-CoA, which is an important reason for the reduced deoxynivalenol production and inhibited virulence of F. graminearum. Moreover, ΔPEX1 and ΔPEX10 showed an increased accumulation of lipid droplets and endogenous reactive oxygen species. In addition, FgPEX1 and FgPEX10 were found to be involved in the maintenance of cell wall integrity and Woronin bodies.
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Acknowledgements
This work was supported by Agro-Industry R and D Special fund of China (2017YFD0201705): integration and demonstration of Chemical Fertilizer reduction Technology for Winter Wheat in East Shandong, the Wheat Innovation Team of Shandong Province Modern Agricultural Industry Technology System (SDAIT-01-09), and Funds of Shandong “Double Tops” Program (SYL2017XTTD11).
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Zhang, L., Liu, C., Wang, L. et al. FgPEX1 and FgPEX10 are required for the maintenance of Woronin bodies and full virulence of Fusarium graminearum. Curr Genet 65, 1383–1396 (2019). https://doi.org/10.1007/s00294-019-00994-8
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DOI: https://doi.org/10.1007/s00294-019-00994-8