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ABSTRACT: Twig blight pathogen Passalora sequoiae

PROVIDER: PRJNA986660 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25000409_1.fastq.gz	Fastqsanger.gz
	SRR25000409_2.fastq.gz	Fastqsanger.gz
	SRR25000410_1.fastq.gz	Fastqsanger.gz
	SRR25000410_2.fastq.gz	Fastqsanger.gz
	SRR25000411_1.fastq.gz	Fastqsanger.gz

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Project description:miRNAs were important regulators involving in plant-pathogen interactions. However, their roles in apple response to Valsa canker pathogen (Valsa mali, Vm) infection were poorly understood. In this study, we constructed two miRNA libraries using the bark tissues of apple twig (Malus domestica Borkh “Fuji”) inoculated with Vm (IVm) and PDA medium (control, BMd). Among the all miRNAs, 23 miRNAs were specifically isolated in BMd and 39 miRNAs were specifically isolated in IVm. Compared with BMd, the expression of 294 miRNAs decreased, and 172 miRNAs increased in IVm, respectively. We also identified the target genes of these miRNAs using degradome sequencing technology. In total, 353 differentially expressed miRNAs during the pathogen infection were detected to target 1 077 unigenes with 2 251 cleavage sites. Based on GO and KEGG analysis, the genes were found to be mainly related to transcription regulation and signal transduction. We further selected 17 miRNAs and 22 corresponding target genes to detect the expression profiles during pathogen infection. The results indicate that most of them are involved in apple twig-Vm interaction. What’s more, miRNAs and their corresponding target genes seem to regulate the apple twig-Vm interaction by forming many complicated regulation networks. It is worth that a conserved miRNAs mdm-miR482b, which was down regulated in IVm compared with BMd, has 14 potential target genes, and most of them were disease resistance related genes. More important, the feedback regulation of sRNA pathway in apple twig was much more complex and critical in the interaction between apple bark tissue and V. mali. The results provide insights into the crucial functions of miRNAs in the woody plant, apple tree-Vm interaction.

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Project description:Late blight, caused by the oomycete Phytophthora infestans, is one of the most damaging potato diseases. Genetic resistance is one of the most effective means to control the destruction caused by this pathogen. Transgenic potato lines harboring a resistance gene, RB, confer broad-spectrum, rate-reducing late blight resistance. A microarray approach was used to understand what genes are manipulated in the potato background after the addition of the RB gene that contribute to the late blight resistant phenotype. Keywords: Time course, disease state analysis CRD (3x2x2) Split-Split Plot: 3 sampling time points after inoculation (2, 5, 10 hours), Two genotypes (Katahdin with and without the RB gene), Inoculation with P. infestans or mock inoculation with water. 48 arrays were hybridized in total; 12 in each biological replicate. Each genotype with the mock and late blight inoculated samples was hybridized on two arrays using a dye-swap procedure. Each genotype had a total of 6 arrays across the three sampling time points.

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