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ABSTRACT: Ralstonia solanacearum Tn-seq under plant immunity

PROVIDER: PRJNA895599 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22094639.fastq.gz	Fastqsanger.gz
	SRR22094640.fastq.gz	Fastqsanger.gz
	SRR22094641.fastq.gz	Fastqsanger.gz
	SRR22094642.fastq.gz	Fastqsanger.gz
	SRR22094643.fastq.gz	Fastqsanger.gz

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iTRAQ analysis of ClpP mutant treated with methyl gallate

Project description:Methyl gallate (MG) is an effective microbicide with great potential usefulness in the integrated management of plant diseases and an important potential drug for clinical application. However, its target remains unknown. This study conducted a transposon sequencing (Tn-seq) under MG treatment in plant pathogenic bacterium Ralstonia solanacearum. Tn-seq identified that the mutation of caseinolytic protease proteolytic subunit gene clpP significantly increased the resistance of R. solanacearum to MG, which was validated by the in-frame gene deletion. iTRAQ proteomics analysis was then employed and revealed that chemotaxis and flagella associated proteins were the major substrates degraded by ClpP under the tested condition. Moreover, sulfur metabolism associated proteins were also possible substrates of ClpP and were up-regulated by MG treatment in the wild type R. solanacearum but not in the clpP mutant. Furthermore, molecular docking confirmed the possible interaction between MG and ClpP. Taken together, this study revealed that MG may target bacterial ClpP, inhibit the activity of ClpP, and consequently disorder bacterial proteostasis, providing a theoretical basis for the application of MG.

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Project description:Plant can perceive and respond natural sound vibration (SV). Artificial SV also served as a novel trigger of induced resistance, although approaches for activating such plant innate immunity intensively studied on the use of biological and chemical agents (BCA). Artificial SV pre-treatment protected Arabidopsis thaliana seedlings against insect pests and fungal pathogens. However, SV-mediated epigenetic modulation remains unexplored while CBA-mediated induced resistance is known as a complicated process involving epigenetic regulation. Here, we performed an expression profiling basd on small RNA-seq experiment to understand the role of 10 kHz SV-mediated epigenetic modification in induced resistance against a soil-borne pathogenic bacterium Ralstonia solanacearum.

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Project description:Ralstonia solanacearum, recognized as a pervasive plant pathogen causing lethal wilt disease in over 450 plant species worldwide, represents a substantial threat to economically vital crops including tomato, chili, and eggplant. Within R. solanacearum, pehR serves as a transcriptional regulator, forming part of the pehSR two-component regulatory system. This system governs the production of polygalacturonase (PG), a crucial extracellular enzyme involved in plant cell wall degradation and bacterial wilt development. Our study focuses on a disruption mutant of the pehR gene from the local isolate R. solanacearum F1C1, obtained from Tezpur, Assam. Utilizing RNA-seq, we examine the gene expression profiles of R. solanacearum F1C1 under pehR regulation. Differential expression analysis between wild type and pehR mutants reveals a set of genes directly influenced by pehR. This comprehensive gene expression analysis provides insights into the system-level responses orchestrated by the pehR regulator in pathogenicity and virulence development. Moreover, it sheds light on the broader regulatory network controlled by pehR and its underlying molecular mechanisms. Our work also underscores the identification of key target genes regulated by pehR within R. solanacearum F1C1, offering a deeper understanding of its role in bacterial pathogenicity. Ultimately, unraveling the complete pehR regulome holds promise for elucidating the regulatory dynamics driving the pathogenic behavior of R. solanacearum F1C1.

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Expression data from Arabidopsis thaliana Col-0 challenged with Ralstonia solanacearum race 4 (roots)

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