Pseudomonas roles in potato pathogen inhibition.
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ABSTRACT:
PROVIDER: PRJEB34261 | ENA |
REPOSITORIES: ENA
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Project description:Oxylipins play a role in the response of plants to pathogens both as antimicrobial compounds and as signaling molecules. In potato, pathogen infection leads to the stimulation of the 9-lipoxygenase pathway (Göbel et al. 2001; 2002; Stumpe et al. 2001). In order to analyze whether 9-LOX-derived oxylipins such as colnele(n)ic acid (products of the 9-divinyl ether synthase reaction) act as signaling molecules for the activation of defense responses, transgenic potato plants (Solanum tuberosum cv. Désirée) were generated which express an RNAi construct directed against the pathogen-induced 9-lipoxygenase (Göbel et al. 2003) or against the pathogen-induced 9-divinyl ether synthase (Stumpe et al. 2001). Highly reduced transcript levels correlate with low levels of 9-lipoxygenase-derived oxylipins (Göbel et al. 2003). Transgenic and wild type plants were grown as sterile plants on MS medium supplemented with agar in a phytochamber with 16 h of light [200 µE] at 22 °C. After transfer to soil, plants were kept in a phytochamber with 16 h of light [200 µE], 18 °C and 60 % humidity for four weeks. Lower leaves were infiltrated with a suspension of Pseudomonas syringae pv. maculicola at a concentration of 108 cfu/ml MgCl2 or, as a control, 10 mM MgCl2-solution. RNA was isolated both from the infiltrated leaves and the upper, non-treated leaves using the trizol method. Subsequently, RNA was digested with DNase and purified via Qiagen RNeasy Kit (Qiagen, Hilden, Germany) according to the manufacturer´s instructions. Keywords: Direct comparison
2007-09-01 | GSE8221 | GEO
Project description:Long noncoding RNAs (lncRNAs) represent a class of RNA molecules that are implicated in regulation of gene expression, both in mammals and plants. While much progress has been made in determining the biological functions of lncRNAs in mammals, the functional roles of lncRNAs in plants are still poorly understood. Specifically, the roles of lncRNAs in plant defense responses are yet to be fully explored. Here, we used strand-specific RNA sequencing to identify 1649 lncRNAs in potato (Solanum tuberosum) from stem tissues. The lncRNAs are expressed from all 12 potato chromosomes and generally smaller in size compared to protein-coding genes. Like in other plants, most potato lncRNAs (86%) are transcribed from intergenic regions and possess single exons. A time-course RNA-seq analysis between a tolerant and susceptible potato cultivar challenged with Pectobacterium carotovorum subsp. brasilience revealed that 227 of these lncRNAs could be associated with response to this pathogen. These results suggest that lncRNAs have potential functional roles in potato defense responses. This work provides the foundation for further functional studies in understanding potato defense mechanisms.
2016-12-31 | GSE74870 | GEO
Project description:Long noncoding RNAs (lncRNAs) represent a class of RNA molecules that are implicated in regulation of gene expression, both in mammals and plants. While much progress has been made in determining the biological functions of lncRNAs in mammals, the functional roles of lncRNAs in plants are still poorly understood. Specifically, the roles of lncRNAs in plant defense responses are yet to be fully explored. Here, we used strand-specific RNA sequencing to identify 1649 lncRNAs in potato (Solanum tuberosum) from stem tissues. The lncRNAs are expressed from all 12 potato chromosomes and generally smaller in size compared to protein-coding genes. Like in other plants, most potato lncRNAs (86%) are transcribed from intergenic regions and possess single exons. A time-course RNA-seq analysis between a tolerant and susceptible potato cultivar challenged with Pectobacterium carotovorum subsp. brasilience revealed that 227 of these lncRNAs could be associated with response to this pathogen. These results suggest that lncRNAs have potential functional roles in potato defense responses. This work provides the foundation for further functional studies in understanding potato defense mechanisms.
2016-11-23 | GSE74869 | GEO
Project description:Regulatory small RNAs (sRNAs) play important roles in many fundamental processes in plant biology such as development, fertilization and stress responses. The AGO protein family has here a central importance in gene regulation based on their capacity to associate with sRNAs followed by mRNA targeting in a sequence-complementary manner. The present study explored Argonautes (AGOs) in the Solanaceae family, with emphasis on potato, Solanum tuberosum (St). A genome-wide monitoring was performed to provide a deeper insight into gene families, genomic localization, gene structure and expression profile against the potato late blight pathogen Phytophthora infestans. Among 15 species in the Solanaceae family we found a variation from ten AGOs in Nicotiana obtusifolia to 17 in N. tabacum. Comprehensive analyses of AGO phylogeny revealed duplication of AGO1, AGO10 and AGO4 paralogs during early radiation of Solanaceae. Fourteen AGOs were identified in potato. Orthologs of AGO8 and AGO9 were missing in the potato genome. However, AGO15 earlier annotated in tomato was identified. StAGO15 differs from the other paralogs having residues of different physico-chemical properties at functionally important amino acid positions. Upon pathogen challenge StAGO15 was significantly activated and hence may play a prominent role in sRNA-based regulation of potato defense.
2020-12-01 | GSE159015 | GEO
Project description:In this study we compare the transcriptome response of two potato varieties Atlantic and NY138 to the infection by Candidatus Liberibacter solanacearum. Four weeks old potato plant grown in growth chamber were infested with potato psyllid to transmit the pathogen Candidatus Liberibacter solanacearum. Three weeks after infestation leaf samples were collected for RNA extraction and transcriptome analysis. This is the first transcriptome study on this potato disease.
2017-11-13 | GSE92312 | GEO
Project description:potato pan-genome sequence Genome sequencing and assembly
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Project description:Potato is one of the most important food crops for human consumption. The obligate biotrophic pathogen Spongospora subterranea infects potato roots and tubers, resulting in considerable loss of potato tuber yield and quality. A comprehensive understanding of how potato plants respond to S. subterranea infection is essential for the development of pathogen-resistant crops. Here we employed label-free proteomics and phosphoproteomics to quantify protein-level responses of the susceptible and resistant potato cultivars in response to S. subterranea. A total of 2669 proteins and 1498 phosphoproteins were quantified in the leaf samples of the different treatment groups. Following statistical analysis of the proteomic data, oxidoreductase activity, electron transfer, and photosynthesis were identified as significant processes that differentially changed upon infection specifically in the resistant cultivar and not in the susceptible cultivar. The phosphoproteomics results indicated increased activity of signal transduction and defence response functions in the resistant cultivar. In contrast, the majority of increased phosphoproteins in the susceptible cultivar were related to transporter activity and localisation. This study provides new insight into the molecular mechanisms involved in potato resistance to S. subterranea infection and has highlighted the critical roles of protein phosphorylation in the regulation of potato immune response.
2022-04-07 | PXD031529 | Pride
Project description:In the present study molecular interactions between potato plants, Colorado potato beetle (CPB) larvae and Potato virus YNTN (PVYNTN) were investigated by analyzing gene expression in potato leaves. Grant ID: J4-4165 Slovenian Research Agency ARRS Growth and defense trade-offs in multitrophic interaction between potato and its two major pests Grant ID: P4-0165 Slovenian Research Agency ARRS Biotechnology and Plant Systems Biology
2014-10-23 | GSE56333 | GEO
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
2009-10-01 | GSE13341 | GEO
Project description:<p>Late blight is one of the main biological stresses limiting the potato yield; however, the biochemical mechanisms underlying the infection process of <em>Phytophthora infestans</em> remain unrevealed. In this study, the late blight-resistant potato cultivar Ziyun No.1 (R) and the susceptible cultivar Favorita (S) were inoculated with <em>P. infestans</em>. Untargeted metabolomics was used to study the changes of metabolites in the compatible and incompatible interactions of the two cultivars and the pathogen at 0, 48 and 96 h postinoculation (hpi). A total of 819 metabolites were identified, and the metabolic differences mainly emerged after 48 hpi. There were 198 and 115 differentially expressed metabolites (DEMs) in the compatible and incompatible interactions. These included 147 and 100 upregulated metabolites during the compatible and incompatible interactions, respectively. Among them, 73 metabolites were identified as the <em>P. infestans</em>-responsive DEMs. Furthermore, the comparisons between the two cultivars identified 57 resistance-related metabolites. Resistant potato cultivar had higher levels of salicylic acid and several upstream phenylpropanoid biosynthesis metabolites, triterpenoids and hydroxycinnamic acids and their derivatives, such as sakuranetin, ferulic acid, ganoderic acid Mi, lucidenic acid D2 and caffeoylmalic acid. These metabolites play crucial roles in cell wall thickening and have antibacterial and antifungal activities. This study reports the time-course metabolomic responses of potatoes to <em>P. infestans</em>. The findings reveal the responses involved in the compatible and incompatible interactions of potatoes and <em>P. infestans</em>.</p>
2022-05-20 | MTBLS4365 | MetaboLights