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ABSTRACT: Potato' pathogenic bacteria

PROVIDER: PRJNA1104548 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR28815589_1.fastq.gz	Fastqsanger.gz
	SRR28815589_2.fastq.gz	Fastqsanger.gz
	SRR28815594_1.fastq.gz	Fastqsanger.gz
	SRR28815594_2.fastq.gz	Fastqsanger.gz

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Lon protease is important for growth under stressful conditions and pathogenicity of the phytopathogen, bacterium Dickeya solani.

Project description:The Lon protein is a protease implicated in virulence of many pathogenic bacteria, including some plant pathogens. However, little is known about the role of Lon in bacteria from genus Dickeya. This group of bacteria include important potato pathogens, with the most aggressive species, D. solani. To determine the importance of Lon for pathogenicity and response to stress conditions of bacteria, we constructed a D. solani Δlon strain. The mutant bacteria showed increased sensitivity to certain stress conditions, in particular osmotic and high-temperature stresses. Furthermore, qPCR analysis showed an increased expression of the lon gene in D. solani under these conditions. The deletion of the lon gene resulted in decreased motility, lower activity of secreted pectinolytic enzymes and finally delayed onset of blackleg symptoms in the potato plants. In the Δlon cells, the altered levels of several proteins, including virulence factors and proteins associated with virulence, were detected by means of MS-SWATCH analysis. These included components of the type III secretion system and proteins involved in bacterial motility. Our results indicate that Lon protease is important for D. solani to withstand stressful conditions and effectively invade the potato plant.

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Comparison of genetic differences between Streptomyces scabies and turgidiscabies strains

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Fusarium oxysporum strain:strain BM3

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Project description:Antagonism between P.donghuensis SVBP6, biocontrol soil bacteria, and M.phaseolina on potato dextrose agar. Untargeted metabolomics of ethyl acetate extracts. Fungal, bacterial, and interaction agar samples.

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Transcriptome profiling and digital gene expression analysis of sweet potato challenged with Fusarium oxysporum f. sp.batatas.

Project description:we performed de novo transcriptome assembly and digital gene expression (DGE) profiling analyses of sweet potato challenged with Fob using Illumina Hiseq technology. A total of 89,944,188 clean reads were generated and were assembled into 101,988 unigenes with an average length of 666bp, 62,605(61.38%) of them were functional annotated in the non-redundant(nr) protein database from NCBI by using BLASTX with a cut-off E-value of 10-5, and COG,GO and KEGG annotations were examined for better understand their functions. Five DGE libraries were constructed from the sweet potato cultivar JS57 (high resistance) and XZH (high susceptible) challenged with pathogenic and Nonpathogenic Fob. The differentially expressed genes including up- and down-regulation in five libraries were identified and calculated based on comparisons of transcriptomes, showing differences in gene expression profiles among the samples. A set of differentially expressed genes involved disease response were identified, including 40 WRKY and seven NAC transcription factors, four resistance genes, 22 pathogenesis-related genes, and six genes involved in SA signal pathway. Our study is the first to provide the transcriptome sequence resource of sweet potato challenged with pathogenic and non-pathogenic Fob and demonstrate its digital expression profiling. We discovered a set of genes involved in disease resistance. These data provides comprehensive sequence resource of sweet potato for genetic and genomic studies and will accelerate the understanding of molecular mechanism of disease resistance.

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Study on the infection mechanism of Verticillium dahliae on potato regulated by the viruence-related pigment biosynthesis protein Vayg1

Project description:Verticillium wilt of potato caused by Verticillium dahliae, also called potato early dying disease, is an important factor limiting potato production in the world. Currently, the poor understanding of the pathogenic mechanism of Verticillium dahliae has led to increasingly severe challenges in the effective control of Verticillium wilt. Many studies have shown that pigment biosynthesis related proteins are virulence factors of Verticillium dahliae, while the regulatory mechanisms are still unknown. In order to elucidate the pathogenic mechanism regulated by the virulence related pigment biosynthesis protein Vayg1 in Verticillium dahliae, proteomic analysis will be used to judge the Vayg1 deletion mutant and the wild-type strain during the infection of potato to explore the Vayg1 involved pathogenic protein network, aiming to identify and understand relevant pathogenic pathways to provide an important support for deeper understanding of the pathogenic mechanism of the pathogen. The key proteins related to virulence and molecular networks that will be obtained in this study could provide new targets for the control of Verticillium wilt and new insights for the improvement of disease management.

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