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ABSTRACT:
PROVIDER: PRJNA524633 | ENA |
REPOSITORIES: ENA
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Project description:【Objective】 The objective of this study is to study the transcriptome regulation mechanism of F. graminearum under different pH stress conditions, analyze the gene expression level and its differences, and explore the metabolic pathways related to the anti-stress response of F. graminearum cells under acidic or alkaline conditions, and reveal how F. graminearum actively regulates intracellular metabolism and synthesis processes to adapt to the changes of extracellular pH environment. 【Method】 F. graminearum was cultured in PDB (potato dextrose broth) medium with initial pH of 4.5, 6.5 and 8.0 for 48 h, and the total RNA of the strain was extracted to construct a cDNA library. Transcriptome sequencing and bioinformatics techniques were used to identify the related differentially expressed genes (DEGs), and the metabolic pathways involved were further analyzed. 【Result】 A total of 4283 DEGs were detected under acidic conditions, of which 2232 were up-regulated and 2252 were down-regulated. Under alkaline conditions, there were a total of 498 DEGs, of which 269 were up-regulated and 229 were down-regulated. The results of Gene Ontology (GO) functional enrichment analysis showed that 211 GO terms were significantly enriched and 72 were down-regulated under acidic conditions. There were 33 GO terms that were revised upwards and 40 downwards under alkaline conditions. The results of KEGG encyclopedia of genes and Genomes (Kyoto Encyclopedia of Genes and Genomes) enrichment analysis showed that 22 pathways were significantly enriched and 32 pathways were down-regulated under acidic conditions. There were 8 up-regulated pathways and 13 down-regulated pathways under alkaline conditions. The expression of membrane transporters and hydrolysis of carbohydrate compounds and other related genes were up-regulated, and the expression of genes related to protein metabolism was down-regulated, which assisted F. graminearum cells to adapt to changes in the external environment. At the same time, F. graminearum maintained the internal environment balance of its own cells by reducing secondary metabolism and amino acid metabolism under acidic and alkaline conditions, respectively, so as to resist extracellular pH stress. 【Conclusion】 In the acidic environment, Fusarium graminearum adapts to the changes in the extracellular environment by promoting the production of riboprotein complexes and secondary metabolism. In an alkaline environment, Fusarium graminearum cells respond to and sense external stresses through amino acid metabolism. The analysis of the metabolic pathways of F. graminearum cells provides important gene expression data for the response of F. graminearum to different pH environments, and the results of this study are helpful to understand the pathogenesis of F. graminearum.
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