The peroxisomal matrix shuttling receptor Pex5 plays a role in FB1 production and virulence in Fusarium verticillioides |
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Authors: | YU Wen-ying LIN Mei YAN Hui-juan WANG Jia-jia ZHANG Sheng-min LU Guo-dong WANG Zong-hua Won-Bo SHIM |
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Institution: | 1. State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Fujian Universities Key Laboratory for Plant–Microbe Interaction, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R.China;2. Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843-2132, USA;3. Marine Biotechnology Center, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, P.R.China |
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Abstract: | The peroxisomal matrix oxidase, catalase and peroxidase are imported peroxisomes through the shuttling receptors, which regulates the cellular oxidative homeostasis and function. Here, we report that PTS1 shuttling receptor FvPex5 is involved in the localization of PTS1, utilization of carbon sources and lipids, elimination ROS, cell wall stress, conidiation, fumonisin B1 (FB1) production, and virulence in maize pathogen Fusarium verticillioides. Significantly, differential expression of PTS1-, PTS2-, PEX- and FB1 toxin-related genes in wild type and ΔFvpex5 mutant were examined by RNA-Seq analyses and confirmed by RT-PCR assay. In addition, different expression of PTS1 and PTS2 genes of the ΔFvpex5 mutant were enriched in diverse biochemical pathways, such as carbon metabolism, nitrogen metabolism, lipid metabolism and the oxidation balance by combining GO and KEGG annotations. Overall, we showed that FvPex5 is involved in the regulation of genes associated with PTS, thereby affecting the oxidation balance, FB1 and virulence in F. verticillioides. The results help to clarify the functional divergence of Pex5 orthologs, and may provide a possible target for controlling F. verticillioides infections and FB1 biosynthesis. |
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Keywords: | FvPex5 PTS virulence |
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