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17 results for “Xanthomonas citri”
Genomic sequences of 343 Xanthomonas citri pv. citri strains from Florida
<p><i>Xanthomonas citri </i>pv.<i> citri </i>(Xcc) causes the devastating citrus canker disease. Xcc is known to have been introduced into Florida, USA in at least three different events in 1915, 1986 and 1995 with the first two claimed to be eradicated. Here, we investigated the population structure of Xcc to understand the mysteries related to its introduction, spread and eradication, and how Xcc strains have evolved in term of pathogenicity and copper resistance. We sequenced whole genome sequences of 343 Xcc strains collected from Florida groves over 20 years. </p>
Unravelling potential virulence factor candidates in Xanthomonas citri. subsp. citri by secretome analysis
<p>Citrus canker is a major disease affecting citrus production in Brazil. Its mainly caused by <em>Xanthomonas citri </em>subsp. <em>citri</em> strain 306 pathotype A (Xac). We analysed the differential expression of proteins secreted by wild type Xac and an asymptomatic mutant for <em>hrpB4</em> (<em>ΔhrpB4</em>) grown in Nutrient Broth (NB) and a medium mimicking growth conditions in the plant (XAM1). This allowed the identification of 55 secreted proteins, of which 37 were secreted by both strains when cultured in XAM1. In this secreted protein repertoire, the following stand out: Virk, Polyphosphate-selective porin, Cellulase, Endoglucanase, Histone-like protein, Ribosomal proteins, five hypothetical proteins expressed only in the wild type strain, Lytic murein transglycosylase, Lipoprotein, Leucyl-tRNA synthetase, Co-chaperonin, Toluene tolerance, C-type cytochrome biogenesis membrane protein, Aminopeptidase and two hypothetical proteins expressed only in the <em>ΔhrpB4 </em>mutant. Furthermore, Peptidoglycan-associated outer membrane protein, Regulator of pathogenicity factor, Outer membrane proteins, Endopolygalacturonase, Chorismate mutase, Peptidyl-prolyl cis-trans isomerase and seven hypothetical proteins were detected in both strains, suggesting that there was no relationship with the secretion mediated by the type III secretory system, which is not functional in the mutant strain. Also worth mentioning is the Elongation factor Tu (EF-Tu), expressed only the wild type strain, and Type IV pilus assembly protein, Flagellin (FliC) and Flagellar hook-associated protein, identified in the wild-type strain secretome when grown only in NB. Noteworthy, that FliC, EF-Tu are classically characterized as PAMPs (Pathogen-associated molecular patterns), responsible for a PAMP-triggered immunity response. Therefore, our results highlight proteins potentially involved with the virulence. Overall, we conclude that the use of secretome data is a valuable approach that may bring more knowledge of the biology of this important plant pathogen, which ultimately can lead to the establishment of new strategies to combat citrus canker.</p>
Variables of importance in the projection (VIP) list with values > 1 from OPLS-DA analysis of Citrus samples inoculated with Xanthomonas citri subs. citri
<p>Features filtered containing Variables of importance in the projection (VIP) values > 1 from OPLS-DA analysis (SIMCA) of Citrus sinensis samples inoculated with Xanthomonas citri subs. citri after 24 and 48 hours post inoculation.</p>
Xanthomonas citri ̶ Pest Report and Datasheet to support ranking of EU candidate priority pests
<p>These two files are part of the outputs produced under the mandate <a href="http://registerofquestions.efsa.europa.eu/roqFrontend/wicket/page?1-1.ILinkListener-contentPane-listContainer-pageable-21-mandateNumberLnk">M-2017-0056</a> of the European Commission requesting EFSA for technical assistance in the field of quarantine pests qualifying as priority pests as by Article 6(2) of the Regulation (EU) 2016/2031 <em>on protective measures against pests of plants</em>.</p> <p>Under the mandate EFSA produced: i) 1 methodology report (DOI available at the field "Related/alternate identifiers"), ii) 28 datasheets, one for each of the 28 candidate pests, and iii) 28 pest reports supporting the information provided in the datasheets.</p> <p>EFSA wishes to acknowledge the contribution of Jaime Cubero, Trond Rafoss, Christian Vernière, Antonio Vicent to the EKE and the review conducted by Marie-Agnès Jacques.</p>
Data from: Comparative genomics of 43 strains of Xanthomonas citri pv. citri reveals the evolutionary events giving rise to pathotypes with different host ranges
Background: The identification of factors involved in the host range definition and evolution is a pivotal challenge in the goal to predict and prevent the emergence of plant bacterial disease. To trace the evolution and find molecular differences between three pathotypes of Xanthomonas citri pv. citri that may explain their distinctive host ranges, 42 strains of X. citri pv. citri and one outgroup strain, Xanthomonas citri pv. bilvae were sequenced and compared. Results: The strains from each pathotype form monophyletic clades, with a short branch shared by the Aw and A pathotypes. Pathotype-specific recombination was detected in seven regions of the alignment. Using Ancestral Character Estimation, 426 SNPs were mapped to the four branches at the base of the A, A*, Aw and A/Aw clades. Several genes containing pathotype-specific nonsynonymous mutations have functions related to pathogenicity. The A pathotype is enriched for SNP-containing genes involved in defense mechanisms, while A* is significantly depleted for genes that are involved in transcription. The pathotypes differ by four gene islands that largely coincide with regions of recombination and include genes with a role in virulence. Both A* and Aw are missing genes involved in defense mechanisms. In contrast to a recent study, we find that there are an extremely small number of pathotype-specific gene presences and absences. Conclusions: The three pathotypes of X. citri pv. citri that differ in their host ranges largely show genomic differences related to recombination, horizontal gene transfer and single nucleotide polymorphism. We detail the phylogenetic relationship of the pathotypes and provide a set of candidate genes involved in pathotype-specific evolutionary events that could explain to the differences in host range and pathogenicity between them.
Data from: Comparative genomics of 43 strains of Xanthomonas citri pv. citri reveals the evolutionary events giving rise to pathotypes with different host ranges
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A transcriptome study of DSF-mediated quorum sensing in Xanthomonas axonopodis pv. citri
GEO Series GSE29877. Xanthomonas citri; Xanthomonas citri pv. citri str. 306. 6 samples. Type: Expression profiling by array.
Transcriptomic dataset of Phaseolus vulgaris leaves in response to the inoculation of pathogenic Xanthomonas citri pv. fuscans and its type 3 secretion system-defective mutant hrcV.
GEO Series GSE271236. Phaseolus vulgaris. 36 samples. Type: Expression profiling by high throughput sequencing.
Gene content or gene expression, which determines the difference in host specificity and virulence of strains of Xanthomonas citri subsp. citri?
GEO Series GSE41519. Xanthomonas citri pv. citri. 12 samples. Type: Expression profiling by high throughput sequencing.
A time-course transcriptome study of hrpG and hrpX regulons in Xanthomonas axonopodis pv. citri
GEO Series GSE24016. Xanthomonas citri pv. citri str. 306. 6 samples. Type: Expression profiling by array.
Transcriptional profiling of sweet orange leaves infected with Xanthomonas citri and Xanthomonas aurantifolii pathotype C
GEO Series GSE202469. Citrus sinensis. 15 samples. Type: Expression profiling by high throughput sequencing.
Xanthomonas citri pv fuscans transcriptomic changes during the contamination of Phaseolus vulgaris seeds
GEO Series GSE227386. Xanthomonas citri pv. fuscans. 17 samples. Type: Expression profiling by high throughput sequencing.
Citrus limon: Control vs. Xanthomonas citri T2 inoculation
GEO Series GSE78012. Citrus x limon; Citrus. 3 samples. Type: Expression profiling by array.
Citrus limon: Control vs. Xanthomonas citri AT inoculation
GEO Series GSE78010. Citrus x limon; Citrus. 3 samples. Type: Expression profiling by array.
Sweet orange genes regulated by Xanthomonas citri (Xc) in the presence or absence of cycloheximide (Ch), or Ch alone
GEO Series GSE51367. Citrus sinensis. 8 samples. Type: Expression profiling by array.
Citrus limon: Control vs. Xanthomonas citri inoculated
GEO Series GSE78013. Citrus x limon; Citrus. 6 samples. Type: Expression profiling by array.
Sweet orange genes regulated by TAL effectors of Xanthomonas citri (Xc) or Xanthomonas aurantifolii pathotype C
GEO Series GSE51368. Citrus sinensis. 12 samples. Type: Expression profiling by array.
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