Project description:Here we performed a transcriptomic study on PaWB phytoplasma-infected Paulownia sp. using Solexa/Illumina’s high-throughput digital gene expression (DGE) system. 4 DGE libraries (from 2 virus-infected samples and 2 healthy samples) were constructed, and the gene expression variations between the PaWB phytoplasma-infected (diseased) sample and the corresponding healthy sample were compared. Thousands of differentially expressed genes were obtained by the comparison, and KEGG pathway analysis of these genes suggested that many biological processes were responded to PaWB infection.
Project description:MicroRNAs (miRNAs) play important roles by regulating the expression of target genes in plant and animal. However, little known about mechanism of fungal miRNA-like RNAs (milRNAs) regulating target gene restricts their functional exploration. In this study, multiple omics were used to identify the milRNAs and their target genes in a phytopathogenic fungus Valsa mali. Many candidate pathogenic factors were found to be regulated by milRNA-directed cleavage way. Absence or downregulated expression of Vm-milRNAs promote expression of candidate pathogenic factors during V. mali infection. Vm-milR16 is a significantly downregulated milRNA during V. mali infection, resulting in significantly upregulated expression of three target genes: VmSNF1, VmDODA, and VmHy1. Overexpression of Vm-milR16 significantly reduces the pathogenicity of V. mali. And all the three target genes of Vm-milR16 are required for the full pathogenicity of V. mali. Further analysis revealed that VmSNF1 regulates the pathogenicity by affecting the expression of pectinase genes during V. mali infection. And all the three target genes are essential for oxidative stress response during V. mali-host interaction. Vm-milRNAs may help V. mali to intelligently use limited resources and adaptively regulate pathogenicity by enhancing expression of pathogenic factors and fitness during infection.
Project description:In order to explore the role of LaeA in secondary metabolite biosynthetic gene clusters’ regulation, toxin production, and virulence of Valsa mali, TMT-based proteomic analysis of wildtype, LaeA deletion mutant and overexpression mutant were performed. Totally, 4,299 proteins (FDR < 0.01) were identified by searching against the Valsa mali protein sequence database.
Project description:Aster yellows phytoplasma strain Hyd35 (16SrI-B) in micropropagated periwinkle shoots in collection was used to produce infected plants in pots that were separated according to the diverse symptomatology i.e. phyllody and witches’ broom. Small RNA high-throughput sequencing (HTS) was then used to determine the small RNA pattern of these plants. Bioinformatics analysis revealed the presence of expression changes of different miRNA classes and the presence of phytoplasma derived small RNAs. These results could complement previous studies and serve as a starting point for small RNA omics in phytoplasma research
Project description:Frankliniella occidentalis is an important insect carrier of virus disease that harms cash crops, and it often causes virus disease to spread widely in cash crops. Post-translational modifications of proteins play an important role in regulating life activities, and the study of newly discovered modifications (PTMs) is of great significance. Lysine Klac (Kla) is an evolutionary conservative form of post-translational modification of a new type of protein discovered in mammals, plants, yeast and pathogenic bacteria in recent years. The study of this modification can increase our understanding of Frankliniella occidentalis, help further study the biological function mechanism of Frankliniella occidentalis and the key to disease transmission, and is of great significance to disease prevention and control.
Project description:Frankliniella occidentalis is an important insect carrier of virus disease that harms cash crops, and it often causes virus disease to spread widely in cash crops. Post-translational modifications of proteins play an important role in regulating life activities, and the study of newly discovered modifications (PTMs) is of great significance. Lysine 2-hydroxyisobutyryl (Khib) is an evolutionary conservative form of post-translational modification of a new type of protein discovered in mammals, plants, yeast and pathogenic bacteria in recent years. The study of this modification can increase our understanding of Frankliniella occidentalis, help further study the biological function mechanism of Frankliniella occidentalis and the key to disease transmission, and is of great significance to disease prevention and control.
