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Artykuły w czasopismach na temat „Xylella fastidiosa subsp. multiplex”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Hernandez-Martinez, R., H. S. Costa, C. K. Dumenyo, and D. A. Cooksey. "Differentiation of Strains of Xylella fastidiosa Infecting Grape, Almonds, and Oleander Using a Multiprimer PCR Assay." Plant Disease 90, no. 11 (2006): 1382–88. http://dx.doi.org/10.1094/pd-90-1382.

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Xylella fastidiosa is a xylem-limited, nutritionally fastidious bacterium that causes several plant diseases including Pierce's disease (PD) in grape and leaf scorch in almond (ALS) and oleander (OLS). OLS strains belong to X. fastidiosa subsp. sandyi, PD strains belong to X. fastidiosa subsp. fastidiosa, and strains from almond designated as ALS strains are of two general types belonging either to X. fastidiosa subsp. multiplex or X. fastidiosa subsp. fastidiosa. The ALS strains assigned to X. fastidiosa subsp. multiplex belong to two different genotypes (ALSI and ALSII) below the subspecies

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Sanderlin, R. S. "Host Specificity of Pecan Strains of Xylella fastidiosa subsp. multiplex." Plant Disease 101, no. 5 (2017): 744–50. http://dx.doi.org/10.1094/pdis-07-16-1005-re.

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Pecan (Carya illinoinensis) bacterial leaf scorch disease, caused by Xylella fastidiosa subsp. multiplex, causes defoliation and reduces terminal growth and nut yield. The pathogen is transmitted to pecan by xylem-feeding spittlebugs and leafhoppers and through graft transmission in the clonal propagation of cultivars. Xylella fastidiosa subsp. multiplex has a broad host range, infecting numerous hardwood tree species and some herbaceous species. There is evidence of additional host specialization within subsp. multiplex. Data presented here support the existence of host specialization with X.

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Yuan, Xiaoli, Lisa Morano, Robin Bromley, Senanu Spring-Pearson, Richard Stouthamer, and Leonard Nunney. "Multilocus Sequence Typing of Xylella fastidiosa Causing Pierce's Disease and Oleander Leaf Scorch in the United States." Phytopathology® 100, no. 6 (2010): 601–11. http://dx.doi.org/10.1094/phyto-100-6-0601.

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Using a modified multilocus sequence typing (MLST) scheme for the bacterial plant pathogen Xylella fastidiosa based on the same seven housekeeping genes employed in a previously published MLST, we studied the genetic diversity of two subspecies, X. fastidiosa subsp. fastidiosa and X. fastidiosa subsp. sandyi, which cause Pierce's disease and oleander leaf scorch, respectively. Typing of 85 U.S. isolates (plus one from northern Mexico) of X. fastidiosa subsp. fastidiosa from 15 different plant hosts and 21 isolates of X. fastidiosa subsp. sandyi from 4 different hosts in California and Texas su

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Krugner, Rodrigo, Mark S. Sisterson, Jianchi Chen, Drake C. Stenger, and Marshall W. Johnson. "Evaluation of Olive as a Host of Xylella fastidiosa and Associated Sharpshooter Vectors." Plant Disease 98, no. 9 (2014): 1186–93. http://dx.doi.org/10.1094/pdis-01-14-0014-re.

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Olive (Olea europaea) trees exhibiting leaf scorch or branch dieback symptoms in California were surveyed for the xylem-limited, fastidious bacterium Xylella fastidiosa. Only approximately 17% of diseased trees tested positive for X. fastidiosa by polymerase chain reaction, and disease symptoms could not be attributed to X. fastidiosa infection of olive in greenhouse pathogenicity assays. Six strains of X. fastidiosa were isolated from olive in Southern California. Molecular assays identified strains recovered from olive as belonging to X. fastidiosa subsp. multiplex. Pathogenicity testing of

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Coletta-Filho, Helvécio D., Carolina S. Francisco, João R. S. Lopes, Christiane Muller, and Rodrigo P. P. Almeida. "Homologous Recombination and Xylella fastidiosa Host–Pathogen Associations in South America." Phytopathology® 107, no. 3 (2017): 305–12. http://dx.doi.org/10.1094/phyto-09-16-0321-r.

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Homologous recombination affects the evolution of bacteria such as Xylella fastidiosa, a naturally competent plant pathogen that requires insect vectors for dispersal. This bacterial species is taxonomically divided into subspecies, with phylogenetic clusters within subspecies that are host specific. One subspecies, pauca, is primarily limited to South America, with the exception of recently reported strains in Europe and Costa Rica. Despite the economic importance of X. fastidiosa subsp. pauca in South America, little is known about its genetic diversity. Multilocus sequence typing (MLST) has

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O’Leary, Michael L., Lindsey P. Burbank, Rodrigo Krugner, and Drake C. Stenger. "Complete Genome Sequence Data of Three Xylella fastidiosa subsp. multiplex Strains Isolated from Olive Trees in California, U.S.A." Phytopathology® 110, no. 11 (2020): 1759–62. http://dx.doi.org/10.1094/phyto-05-20-0167-a.

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Xylella fastidiosa is a xylem-limited bacterial plant pathogen that causes disease on numerous hosts. Additionally, X. fastidiosa asymptomatically colonizes a wide range of plant species. X. fastidiosa subsp. multiplex has been detected in olive (Olea europaea) trees grown in California, U.S.A., as well as in Europe. Strains of X. fastidiosa subsp. multiplex isolated from California olive trees are not known to cause disease on olive, although some can induce leaf-scorch symptoms on almond (Prunus dulcis). No genome assemblies currently exist for olive-associated X. fastidiosa subsp. multiplex

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Oliver, J. E., P. A. Cobine, and L. De La Fuente. "Xylella fastidiosa Isolates from Both subsp. multiplex and fastidiosa Cause Disease on Southern Highbush Blueberry (Vaccinium sp.) Under Greenhouse Conditions." Phytopathology® 105, no. 7 (2015): 855–62. http://dx.doi.org/10.1094/phyto-11-14-0322-fi.

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Xylella fastidiosa is a xylem-limited gram-negative plant pathogen that affects numerous crop species, including grape, citrus, peach, pecan, and almond. Recently, X. fastidiosa has also been found to be the cause of bacterial leaf scorch on blueberry in the southeastern United States. Thus far, all X. fastidiosa isolates obtained from infected blueberry have been classified as X. fastidiosa subsp. multiplex; however, X. fastidiosa subsp. fastidiosa isolates are also present in the southeastern United States and commonly cause Pierce’s disease of grapevines. In this study, seven southeastern U

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8

Arias-Giraldo, Luis F., Annalisa Giampetruzzi, Madis Metsis, et al. "Complete Circularized Genome Data of Two Spanish strains of Xylella fastidiosa (IVIA5235 and IVIA5901) Using Hybrid Assembly Approaches." Phytopathology® 110, no. 5 (2020): 969–72. http://dx.doi.org/10.1094/phyto-01-20-0012-a.

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Xylella fastidiosa is an economically important plant pathogenic bacterium of global importance associated, since 2013, with a devastating epidemic in olive trees in Italy. Since then, several outbreaks of this pathogen have been reported in other European member countries including Spain, France, and Portugal. In Spain, the three major subspecies (subsp. fastidiosa, multiplex, and pauca) of the bacterium have been detected in the Balearic Islands, but only subspecies multiplex in the mainland (Alicante). We present the first complete genome sequences of two Spanish strains: X. fastidiosa subs

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Randall, Jennifer J., Natalie P. Goldberg, John D. Kemp, et al. "Genetic Analysis of a Novel Xylella fastidiosa Subspecies Found in the Southwestern United States." Applied and Environmental Microbiology 75, no. 17 (2009): 5631–38. http://dx.doi.org/10.1128/aem.00609-09.

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ABSTRACT Xylella fastidiosa, the causal agent of several scorch diseases, is associated with leaf scorch symptoms in Chitalpa tashkentensis, a common ornamental landscape plant used throughout the southwestern United States. For a number of years, many chitalpa trees in southern New Mexico and Arizona exhibited leaf scorch symptoms, and the results from a regional survey show that chitalpa trees from New Mexico, Arizona, and California are frequently infected with X. fastidiosa. Phylogenetic analysis of multiple loci was used to compare the X. fastidiosa infecting chitalpa strains from New Mex

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Rogers, Elizabeth E., and Craig A. Ledbetter. "Susceptibility to Xylella fastidiosa in a First-generation Hybrid from a non-traditional Peach–Almond Cross." HortScience 50, no. 3 (2015): 337–40. http://dx.doi.org/10.21273/hortsci.50.3.337.

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To facilitate development of Prunus L. rootstocks with desirable agronomic traits, domesticated peach (Prunus persica) and almond (P. dulcis) were crossed with wild almond relatives. This work reports that a hybrid from a P. webbii × P. persica cv. Harrow Blood cross is susceptible to almond leaf scorch disease (ALSD). ALSD is caused by the fastidious, xylem-limited bacterium Xylella fastidiosa. The P. webbii × ‘Harrow Blood’ hybrid, along with its parents, was inoculated with two ALSD-inducing strains (X. fastidiosa subsp. fastidiosa strain M23 and subsp. multiplex strain Dixon). Both X. fast

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Schaad, Norman W., Elena Postnikova, George Lacy, M'Barek Fatmi, and Chung-Jan Chang. "Xylella fastidiosa subspecies: X. fastidiosa subsp piercei, subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov." Systematic and Applied Microbiology 27, no. 3 (2004): 290–300. http://dx.doi.org/10.1078/0723-2020-00263.

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Schaad, Norman W., Elena Postnikova, George Lacy, M'Barek Fatmi, and Chung-Jan Chang. "Xylella fastidiosa subspecies: X. fastidiosa subsp piercei, subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov." Systematic and Applied Microbiology 27, no. 6 (2004): 763. http://dx.doi.org/10.1078/0723202042369848.

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Schuenzel, Erin L., Mark Scally, Richard Stouthamer, and Leonard Nunney. "A Multigene Phylogenetic Study of Clonal Diversity and Divergence in North American Strains of the Plant Pathogen Xylella fastidiosa." Applied and Environmental Microbiology 71, no. 7 (2005): 3832–39. http://dx.doi.org/10.1128/aem.71.7.3832-3839.2005.

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ABSTRACT Xylella fastidiosa is a pathogen that causes leaf scorch and related diseases in over 100 plant species, including Pierce's disease in grapevines (PD), phony peach disease (PP), plum leaf scald (PLS), and leaf scorch in almond (ALS), oak (OAK), and oleander (OLS). We used a high-resolution DNA sequence approach to investigate the evolutionary relationships, geographic variation, and divergence times among the X. fastidiosa isolates causing these diseases in North America. Using a large data set of 10 coding loci and 26 isolates, the phylogeny of X. fastidiosa defined three major clade

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Melanson, R. A., R. S. Sanderlin, A. R. McTaggart, and J. H. Ham. "A Systematic Study Reveals that Xylella fastidiosa Strains from Pecan Are Part of X. fastidiosa subsp. multiplex." Plant Disease 96, no. 8 (2012): 1123–34. http://dx.doi.org/10.1094/pdis-09-11-0730-re.

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Xylella fastidiosa causes disease in a number of economically important crops, ornamental plants, and shade trees, including grapevine, citrus, oleander, and sycamore. In pecan, X. fastidiosa causes pecan bacterial leaf scorch (PBLS), which leads to defoliation and reduces nut yield. No economically effective treatments are available for PBLS. In order to improve PBLS management practices, it is necessary to determine the subspecies of X. fastidiosa strains that infect pecan so that potential sources of inoculum may be identified. Multiprimer polymerase chain reaction (PCR) and phylogenetic an

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Hernandez-Martinez, Rufina, Karla A. de la Cerda, Heather S. Costa, Donald A. Cooksey, and Francis P. Wong. "Phylogenetic Relationships of Xylella fastidiosa Strains Isolated from Landscape Ornamentals in Southern California." Phytopathology® 97, no. 7 (2007): 857–64. http://dx.doi.org/10.1094/phyto-97-7-0857.

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Xylella fastidiosa is an insect-borne, xylem-limited pathogenic bacterium that has been associated with a rise in incidence of diseased landscape ornamentals in southern California. The objective of this study was to genetically characterize strains isolated from ornamental hosts to understand their distribution and identity. Strains of X. fastidiosa isolated from ornamentals were characterized using a multiprimer polymerase chain reaction (PCR) system, random amplified polymorphic DNA (RAPD)-PCR, and sequence analysis of the 16S-23S rDNA intergenic spacer region (ISR). Based on RAPD-PCR and 1

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MONTILON, Vito, Oriana POTERE, Leonardo SUSCA, et al. "Isolation and molecular characterization of a Xylella fastidiosa subsp. multiplex strain from almond (Prunus dulcis) in Apulia, Southern Italy." Phytopathologia Mediterranea 63, no. 3 (2024): 423–29. https://doi.org/10.36253/phyto-15810.

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Xylella fastidiosa is a xylem-limited phytopathogenic bacterium under regulation in the European Union as a priority pest. Given the potential risk posed by this pathogen to cultivated and ornamental plants, mandatory annual surveys and laboratory testing are required in Member States to early detect outbreaks. In the course of surveys carried out during early spring 2024 in the Apulia region (Southern Italy), X. fastidiosa subsp. multiplex was identified using quantitative real-time Polymerase Chain Reaction (qPCR), in a non-symptomatic sample from an almond tree (Prunus dulcis) in an orchard

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Giampetruzzi, Annalisa, Giusy D’Attoma, Stefania Zicca, et al. "Draft Genome Sequence Resources of Three Strains (TOS4, TOS5, and TOS14) of Xylella fastidiosa Infecting Different Host Plants in the Newly Discovered Outbreak in Tuscany, Italy." Phytopathology® 109, no. 9 (2019): 1516–18. http://dx.doi.org/10.1094/phyto-04-19-0108-a.

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An outbreak of Xylella fastidiosa was discovered in late 2018 in northern Italy affecting several plant species. Multilocus sequence typing analyses detected the presence of strains clustering in X. fastidiosa subsp. multiplex and harboring a hitherto uncharacterized sequence type, ST87. Three cultured strains (TOS4, TOS5, and TOS14) were subjected to high-throughput sequencing and the draft genomes assembled. Phylogenetic analysis conclusively indicated that they belong to the subspecies multiplex. The genetic information generated for these newly discovered strains further supports the evide

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Scally, Mark, Erin L. Schuenzel, Richard Stouthamer, and Leonard Nunney. "Multilocus Sequence Type System for the Plant Pathogen Xylella fastidiosa and Relative Contributions of Recombination and Point Mutation to Clonal Diversity." Applied and Environmental Microbiology 71, no. 12 (2005): 8491–99. http://dx.doi.org/10.1128/aem.71.12.8491-8499.2005.

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ABSTRACT Multilocus sequence typing (MLST) identifies and groups bacterial strains based on DNA sequence data from (typically) seven housekeeping genes. MLST has also been employed to estimate the relative contributions of recombination and point mutation to clonal divergence. We applied MLST to the plant pathogen Xylella fastidiosa using an initial set of sequences for 10 loci (9.3 kb) of 25 strains from five different host plants, grapevine (PD strains), oleander (OLS strains), oak (OAK strains), almond (ALS strains), and peach (PP strains). An eBURST analysis identified six clonal complexes

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Burbank, Lindsey P., Mark S. Sisterson, and Michael L. O’Leary. "Infection of Blueberry Cultivar ‘Emerald’ with a California Pierce’s Disease Strain of Xylella fastidiosa and Acquisition by Glassy-Winged Sharpshooter." Plant Disease 104, no. 1 (2020): 154–60. http://dx.doi.org/10.1094/pdis-05-19-1126-re.

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Bacterial leaf scorch disease caused by Xylella fastidiosa occurs in southern highbush blueberry varieties in the southeastern United States. Susceptibility to X. fastidiosa varies by blueberry cultivar, and these interactions are often strain-specific. Xylella fastidiosa subsp. fastidiosa is the causal agent of Pierce’s disease in grapevines, and it has been problematic in the San Joaquin Valley of California since the introduction of the glassy-winged sharpshooter (Homalodisca vitripennis). The glassy-winged sharpshooter is known to feed on blueberry, a crop that is expanding in the San Joaq

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Hernandez-Martinez, R., T. R. Pinckard, H. S. Costa, D. A. Cooksey, and F. P. Wong. "Discovery and Characterization of Xylella fastidiosa Strains in Southern California Causing Mulberry Leaf Scorch." Plant Disease 90, no. 9 (2006): 1143–49. http://dx.doi.org/10.1094/pd-90-1143.

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Mulberry leaf scorch (MLS), caused by Xylella fastidiosa, is a disease of mulberry trees in the United States that has largely been documented from locations in the eastern and central areas of the country. MLS was recently detected for the first time in white mulberry (Morus alba) trees in southern California. Four MLS-strains were isolated from two locations and confirmed as X. fastidiosa by enzyme-linked immunosorbent assay (ELISA), direct isolation of the pathogen, and use of the X. fastidiosa-specific PCR primers RST31-33. Isolated strains were characterized by the sequencing of their 16S

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Giampetruzzi, Annalisa, Maria Saponari, Giuliana Loconsole, et al. "Genome-Wide Analysis Provides Evidence on the Genetic Relatedness of the Emergent Xylella fastidiosa Genotype in Italy to Isolates from Central America." Phytopathology® 107, no. 7 (2017): 816–27. http://dx.doi.org/10.1094/phyto-12-16-0420-r.

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Xylella fastidiosa is a plant-pathogenic bacterium recently introduced in Europe that is causing decline in olive trees in the South of Italy. Genetic studies have consistently shown that the bacterial genotype recovered from infected olive trees belongs to the sequence type ST53 within subspecies pauca. This genotype, ST53, has also been reported to occur in Costa Rica. The ancestry of ST53 was recently clarified, showing it contains alleles that are monophyletic with those of subsp. pauca in South America. To more robustly determine the phylogenetic placement of ST53 within X. fastidiosa, we

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Cendoya, Martina, Joaquín Martínez-Minaya, Vicente Dalmau, et al. "Spatial Bayesian Modeling Applied to the Surveys of Xylella fastidiosa in Alicante (Spain) and Apulia (Italy)." Frontiers in Plant Science 11 (August 14, 2020): 1204. https://doi.org/10.3389/fpls.2020.01204.

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The plant-pathogenic bacterium <em>Xylella fastidiosa</em> was first reported in Europe in 2013, in the province of Lecce, Italy, where extensive areas were affected by the olive quick decline syndrome, caused by the subsp. <em>pauca</em>. In Alicante, Spain, almond leaf scorch, caused by <em>X. fastidiosa</em> subsp. <em>multiplex</em>, was detected in 2017. The effects of climatic and spatial factors on the geographic distribution of <em>X. fastidiosa</em> in these two infested regions in Europe were studied. The presence/absence data of <em>X. fa

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MORALEJO, Eduardo, Bàrbara QUETGLAS, Marina MONTESINOS, et al. "Outbreak of Xylella fastidiosa subsp. pauca ST53 affecting wild and cultivated olive trees on the island of Mallorca, Spain." Phytopathologia Mediterranea 63, no. 3 (2024): 475–80. https://doi.org/10.36253/phyto-15891.

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The Balearic Islands have emerged as a hotspot for the invasive plant pathogen Xylella fastidiosa (Xf). Since 2016, the Xf subsp. fastidiosa and multiplex have been detected causing almond leaf scorch and Pierce’s disease on the island of Mallorca, Spain, and a new sequence type (ST), ST80, of subsp. pauca is infecting wild and cultivated olive trees on the island of Ibiza. In addition, Xf subsp. multiplex ST81 is widespread in scrublands, and causes mild, sub-lethal dieback of wild olive trees in Menorca and Mallorca. A new outbreak is here reported of the Xf subsp. pauca in the municipality

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Harris, Jordan L., Patrick L. Di Bello, Monica Lear, and Yilmaz Balci. "Bacterial Leaf Scorch in the District of Columbia: Distribution, Host Range, and Presence of Xylella fastidiosa Among Urban Trees." Plant Disease 98, no. 12 (2014): 1611–18. http://dx.doi.org/10.1094/pdis-02-14-0158-sr.

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A survey of urban trees affected by bacterial leaf scorch (BLS) caused by Xylella fastidiosa was conducted in the District of Columbia during 2011 and 2012. Over 20 species of urban trees were evaluated at 95 sites. Symptomatic and asymptomatic foliage from trees with BLS symptoms and foliage from neighboring asymptomatic trees were sampled. An X. fastidiosa-specific enzyme-linked immunosorbent assay (ELISA) and a polymerase chain reaction assay were used to detect and identify the strains from environmental samples. Symptomatic trees testing ELISA-positive for X. fastidiosa occurred most freq

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GARGANI, ELISABETTA, CLAUDIA BENVENUTI, LEONARDO MARIANELLI, et al. "A FIVE-YEAR SURVEY IN TUSCANY (ITALY) AND DETECTION OF XYLELLA FASTIDIOSASUBSPECIES MULTIPLEXIN POTENTIAL INSECT VECTORS, COLLECTED IN MONTE ARGENTARIO." Redia 104 (May 12, 2021): 75–88. http://dx.doi.org/10.19263/redia-104.21.09.

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The vector‐borne bacterium Xylella fastidiosa(Wells and Raju) causes several serious diseases to plants. Recently, different subspecies of X. fastidiosa were reported in some European countries. The risk of the bacterium’s spread on the entire European territory is very high; therefore, it has been added into the priority pest list (2019/1702/EU Regulation). The main purposes of this work were to verify the presence of potential vectors in areas at a high risk of introduction in Tuscany and to ascertain the presence of X. fastidiosa in these insect vectors. Over 4,000 Auchenorrhyncha were coll

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Kandel, Prem P., Rodrigo P. P. Almeida, Paul A. Cobine, and Leonardo De La Fuente. "Natural Competence Rates Are Variable Among Xylella fastidiosa Strains and Homologous Recombination Occurs In Vitro Between Subspecies fastidiosa and multiplex." Molecular Plant-Microbe Interactions® 30, no. 7 (2017): 589–600. http://dx.doi.org/10.1094/mpmi-02-17-0053-r.

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Xylella fastidiosa, an etiological agent of emerging crop diseases around the world, is naturally competent for the uptake of DNA from the environment that is incorporated into its genome by homologous recombination. Homologous recombination between subspecies of X. fastidiosa was inferred by in silico studies and was hypothesized to cause disease emergence. However, no experimental data are available on the degree to which X. fastidiosa strains are capable of competence and whether recombination can be experimentally demonstrated between subspecies. Here, using X. fastidiosa strains from diff

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Di Genova, Dario, Kippy J. Lewis, and Jonathan E. Oliver. "Natural Infection of Southern Highbush Blueberry (Vaccinium corymbosum Interspecific Hybrids) by Xylella fastidiosa subsp. fastidiosa." Plant Disease 104, no. 10 (2020): 2598–605. http://dx.doi.org/10.1094/pdis-11-19-2477-re.

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Xylella fastidiosa (Xf) is an emerging insect-vectored, xylem-limited bacterium that can cause disease on several economically important fruit and tree crops including almond, blueberry, citrus, grapevine, peach, and pecan. On blueberry, Xf causes bacterial leaf scorch (BLS), which is prevalent in the southeastern United States. This disease, previously reported to be caused by Xf subsp. multiplex (Xfm), can result in rapid plant decline and death of southern highbush (SHB) blueberry cultivars. In 2017, a survey of blueberry plantings in southern Georgia (U.S.A.) confirmed the presence of Xf-i

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Gabardo, Gislaine, Clandio Medeiros da Silva, Henrique Luis da Silva, Iohann Metzger Iauchrowitz, Flávio Corrêa Carvalho, and Rui Pereira Leite Junior. "Selection of plum genotypes for resistance to leaf scald." Summa Phytopathologica 46, no. 4 (2020): 305–7. http://dx.doi.org/10.1590/0100-5405/238868.

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ABSTRACT Plum (Prunus salicina Lindl.) cultivation is seriously compromised in Brazil due to the occurrence of leaf scald, a disease caused by the bacterium Xylella fastidiosa subsp. multiplex. The objective of this study was to evaluate plum genotypes agronomically promising for resistance to leaf scald, under natural conditions of occurrence of the disease. Ten out of 50 plum genotypes belonging to the germplasm bank of “Instituto Agronômico do Paraná (IAPAR)” were selected. Five evaluations of leaf scald severity were carried out from January to February (2017 and 2018). Polymerase chain re

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Maria, Saponari, D'attoma Giusy, Montes Borrego Miguel, De La Fuente Leonardo, Loconsole Giuliana, and Beatriz Landa Blanca. "RAPID SCREENING TESTS FOR DIFFERENTIATING XYLELLA FASTIDIOSA ISOLATES." Journal of Plant Pathology (2016) 98 (Supplement) (December 1, 2016): S27. https://doi.org/10.5281/zenodo.268883.

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The bacterial pathogen Xylella fastidiosa (Xf) is characterized by a wide plant host range and insect vectors, and on the basis of phylogenetic studies it was subdivided into different subspecies. Results from strain typing, phylogenetic analyses, and other data comparisons have shown that phylogenetic clusters exhibit hostbased genetic relationships. Until now, different molecular tests can be used for the differentiation of Xf isolates, among which MLST/ MLSA represents the most common method to determine classification and phylogenetic placement of novel isolates. Xf outbreaks in EU motivat

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Waliullah, Sumyya, Dario Di Genova, Jonathan E. Oliver, and Md Emran Ali. "Development of a CAPS Marker and a LAMP Assay for Rapid Detection of Xylella fastidiosa Subsp. multiplex and Differentiation from X. fastidiosa Subsp. fastidiosa on Blueberry." International Journal of Molecular Sciences 23, no. 4 (2022): 1937. http://dx.doi.org/10.3390/ijms23041937.

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Bacterial leaf scorch (BLS), caused by Xylella fastidiosa (Xf), is a prevalent disease of blueberries in the southeastern United States. Initially, this disease was reported to be caused by X. fastidiosa subsp. multiplex (Xfm). However, a recent survey revealed the presence of another subspecies, X. fastidiosa subsp. fastidiosa (Xff), within naturally infected blueberry plantings in Georgia. Since knowledge regarding the origins of isolates causing Xf outbreaks can impact management recommendations, a routine method for identifying the pathogen at the subspecies level can be beneficial. Severa

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Giampetruzzi, Annalisa, María Pilar Velasco-Amo, Ester Marco-Noales, et al. "Draft Genome Resources of Two Strains (“ESVL” and “IVIA5901”) of Xylella fastidiosa Associated with Almond Leaf Scorch Disease in Alicante, Spain." Phytopathology® 109, no. 2 (2019): 219–21. http://dx.doi.org/10.1094/phyto-09-18-0328-a.

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An outbreak of Xylella fastidiosa subsp. multiplex sequence type ST6 was discovered in 2017 in mainland Spain affecting almond trees. Two cultured almond strains, “ESVL” and “IVIA5901,” were subjected to high throughput sequencing and the draft genomes assembled. Phylogenetic analysis conclusively indicated they belong to the subspecies multiplex, and pairwise comparisons of the chromosomal genomes showed an average nucleotide identity higher than 99%. Interestingly, the two strains differ for the presence of the plasmids pXF64-Hb_ESVL and pUCLA-ESVL detected only in the ESVL strain. The avail

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Nunney, Leonard, Hamid Azad, and Richard Stouthamer. "An Experimental Test of the Host-Plant Range of Nonrecombinant Strains of North American Xylella fastidiosa subsp. multiplex." Phytopathology® 109, no. 2 (2019): 294–300. http://dx.doi.org/10.1094/phyto-07-18-0252-fi.

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Nonrecombinant strains of Xylella fastidiosa subsp. multiplex (those lacking evidence of significant intersubspecific homologous recombination) infect the xylem of a wide range of native and nonnative trees in North America. However, the degree to which different strains have a specialized host range remains poorly understood. We tested eight strains isolated from five different tree species (almond, olive, sweetgum, and plum in California and oak in Washington, DC). Experiments were conducted in greenhouses in Riverside, CA, and each strain was tested on 11 to 15 of the 17 plant species teste

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Belmonte, Antonella, Giovanni Gadaleta, and Annamaria Castrignanò. "Use of Geostatistics for Multi-Scale Spatial Modeling of Xylella Fastidiosa subsp. pauca (Xfp) Infection with Unmanned Aerial Vehicle Image." Remote Sensing 15, no. 3 (2023): 656. http://dx.doi.org/10.3390/rs15030656.

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In recent years, the use of Unmanned Aerial Vehicles (UAVs) has been spreading widely, as in plant pest control. The collection of huge amounts of spatial data raises various issues including that of scale. Data from UAVs generally explore multiple scales, so the problem arises in determining which one(s) may be relevant for a given application. The objective of this work was to investigate the potential of UAV images in the fight against the Xylella pest for olive trees. The data were a multiband UAV image collected on one date in an olive grove affected by Xylella. A multivariate geostatisti

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Romero Fernández, Miguel Gustavo. "Análisis de distribución potencial de Xylella fastidiosa subsp. multiplex ST-6 y Philaenus spumarius en el sur de la Península Ibérica mediante el modelo ecológico de nicho MaxEnt." GeoFocus Revista Internacional de Ciencia y Tecnología de la Información Geográfica 25 (July 30, 2020): 77–102. http://dx.doi.org/10.21138/gf.664.

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Frem, Michel, Vincenzo Fucilli, Franco Nigro, et al. "The potential direct economic impact and private management costs of an invasive alien species: Xylella fastidiosa on Lebanese wine grapes." NeoBiota 70 (December 6, 2021): 43–67. http://dx.doi.org/10.3897/neobiota.70.72280.

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Since its outbreak in 2013 in Italy, the harmful bacterium Xylella fastidiosa has continued to spread throughout the Euro-Mediterranean basin and, more recently, in the Middle East region. Xylella fastidiosa subsp. fastidiosa is the causal agent of Pierce’s disease on grapevines. At present, this alien subspecies has not been reported in Lebanon but if this biological invader was to spread with no cost-effective and sustainable management, it would put Lebanese vineyards at a certain level of risk. In the absence of an Xylella fastidiosa subsp. fastidiosa outbreak, the gross revenue generated

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Frem, Michel, Vincenzo Fucilli, Franco Nigro, et al. "The potential direct economic impact and private management costs of an invasive alien species: Xylella fastidiosa on Lebanese wine grapes." NeoBiota 70 (December 6, 2021): 43–67. https://doi.org/10.3897/neobiota.70.72280.

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Since its outbreak in 2013 in Italy, the harmful bacterium Xylella fastidiosa has continued to spread throughout the Euro-Mediterranean basin and, more recently, in the Middle East region. Xylella fastidiosa subsp. fastidiosa is the causal agent of Pierce's disease on grapevines. At present, this alien subspecies has not been reported in Lebanon but if this biological invader was to spread with no cost-effective and sustainable management, it would put Lebanese vineyards at a certain level of risk. In the absence of an Xylella fastidiosa subsp. fastidiosa outbreak, the gross revenue generated

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"xylella fastidiosa subsp. multiplex." CABI Compendium CABI Compendium (January 7, 2022). http://dx.doi.org/10.1079/cabicompendium.40549980.

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Oliver, Jonathan E., Kippy J. Lewis, Shae J. Taylor, and Jianchi Chen. "Complete Genome Sequences of Xylella fastidiosa subsp. fastidiosa and X. fastidiosa subsp. multiplex Strains Causing Blueberry Bacterial Leaf Scorch Disease in Georgia, USA." Microbiology Resource Announcements, May 31, 2023. http://dx.doi.org/10.1128/mra.00114-23.

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Here, we report the complete genome sequences of Xylella fastidiosa subsp. fastidiosa strain AlmaReb2 and X. fastidiosa subsp. multiplex strain AlmaRebR6, causing blueberry bacterial leaf scorch disease in Georgia, USA. The X. fastidiosa subsp. fastidiosa AlmaRebR2 chromosome is 2,549,422 bp, and the X. fastidiosa subsp. multiplex AlmaReb6 chromosome is 2,530,348 bp.

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Vanhove, Mathieu, Adam C. Rechtless, Anne Sicard, et al. "Genomic Diversity and Recombination among Xylella fastidiosa Subspecies." July 17, 2019. https://doi.org/10.1128/AEM .02972-18.

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<em>Xylella fastidiosa </em>is an economically important bacterial plant pathogen. With insights gained from 72 genomes, this study investigated differences among the three main subspecies, which have allopatric origins: <em>X. fastidiosa</em> subsp. <em>fastidiosa</em>, <em>multiplex</em>, and <em>pauca</em>. The origin of recombinogenic<em> X. fastidiosa</em> subsp. <em>morus </em>and <em>sandyi </em>was also assessed. The evolutionary rate of the 622 genes of the species core genome was estimated at the scale of an <em>X. fastidiosa </em>subsp. <em>pauca </em>subclade (7.62 107 substitution

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Vanhove, Mathieu, Adam C. Retchless, Anne Sicard, et al. "Genomic Diversity and Recombination among Xylella fastidiosa Subspecies." Applied and Environmental Microbiology 85, no. 13 (2019). http://dx.doi.org/10.1128/aem.02972-18.

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ABSTRACT Xylella fastidiosa is an economically important bacterial plant pathogen. With insights gained from 72 genomes, this study investigated differences among the three main subspecies, which have allopatric origins: X. fastidiosa subsp. fastidiosa, multiplex, and pauca. The origin of recombinogenic X. fastidiosa subsp. morus and sandyi was also assessed. The evolutionary rate of the 622 genes of the species core genome was estimated at the scale of an X. fastidiosa subsp. pauca subclade (7.62 × 10−7 substitutions per site per year), which was subsequently used to estimate divergence time

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Krugner, Rodrigo, Mark S. Sisterson, Jianchi Chen, Drake C. Stenger, and Marshall W. Johnson. "Evaluation of Olive as a Host of Xylella fastidiosa and Associated Sharpshooter Vectors." September 1, 2014. https://doi.org/10.1094/pdis-01-14-0014-re.

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Olive (Olea europaea) trees exhibiting leaf scorch or branch dieback symptoms in California were surveyed for the xylem-limited, fastidious bacterium Xylella fastidiosa. Only approximately 17% of diseased trees tested positive for X. fastidiosa by polymerase chain reaction, and disease symptoms could not be attributed to X. fastidiosa infection of olive in greenhouse pathogenicity assays. Six strains of X. fastidiosa were isolated from olive in Southern California. Molecular assays identified strains recovered from olive as belonging to X. fastidiosa subsp. multiplex. Pathogenicity testing of

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"Xylella fastidiosa subsp. multiplex. [Distribution map]." Distribution Maps of Plant Diseases, No.April (August 1, 2018). http://dx.doi.org/10.1079/dmpd/20183138505.

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Abstract A new distribution map is provided for Xylella fastidiosa subsp. multiplex Schaad et al. Gammaproteobacteria: Xanthomonadales: Xanthomonadaceae. Hosts: olive (Olea europaea), Prunus persica, coffee (Coffea spp.), Citrus, Polygala myrtifolia, many tree species. Information is given on the geographical distribution in Europe (France, Mainland France, Corsica, Spain, Mainland Spain, Balearic Islands), North America (USA, Alabama, California, District of Columbia, Florida, Georgia, Indiana, Kentucky Louisiana, North Carolina, Tennessee, Texas, Virginia), South America (Argentina, Brazil,

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VELASCO-AMO, María Pilar, Luis F. ARIAS-GIRALDO, and Blanca B. LANDA. "Complete genome assemblies of several Xylella fastidiosa subspecies multiplex strains reveals high phage content and novel plasmids." Phytopathologia Mediterranea, February 17, 2024, 15–23. http://dx.doi.org/10.36253/phyto-14931.

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The Gram-negative bacterium Xylella fastidiosa (Xf) was originally found in the Americas, but has now been identified in more than 20 countries across America, Asia, and Europe. This plant pathogen is currently listed as a priority pest in Europe due to its socio-economic and ecological impacts. Within the three Xf subspecies fastidiosa, multiplex and pauca, subsp. multiplex displays a notably wider range of host plants than the other two subspecies. Comparative genomics may allow determination of how Xf subsp. multiplex adapts to new and diverse hosts and environments, so it is important that

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GHANBARI, Davood, Nader HASANZADEH, Mariam GHAYEB ZAMHARIR, Shaghayegh NASR, Kaoutar EL HANDI, and Toufic ELBEAINO. "Detection and characterization of Xylella fastidiosa in Iran: first report in alfalfa (Medicago sativa)." Phytopathologia Mediterranea, November 15, 2024, 335–42. http://dx.doi.org/10.36253/phyto-15569.

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Bacterial pathogens, especially Xylella fastidiosa (Xf), are significant threats to agricultural productivity, affecting economically important crops. The recent detection of Xf in Europe and the Middle East, including Iran, has emphasized the urgency for comprehensive surveillance to assess and understand the genetic diversity and distribution of this pathogen. A comprehensive survey from 2019 to 2022 was carried out in Iran to investigate Xf occurrence. A total of 403 samples were collected from alfalfa, almond, citrus, cherry, grapevine, olive, and pistachio plantations. Using serological (

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Cunty, Amandine, Bruno Legendre, Pauline de Jerphanion, et al. "Update of the Xylella fastidiosa outbreak in France: two new variants detected and a new region affected." European Journal of Plant Pathology, March 19, 2022. http://dx.doi.org/10.1007/s10658-022-02492-z.

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AbstractXylella fastidiosa is a xylem-limited bacterium native to America and classified as a priority pest for EU regulation. Since 2013, X. fastidiosa has been identified in European countries with a Mediterranean climate, such as Italy, France, Spain and Portugal, with different subspecies and sequence types (ST) detected. Since 2015 X. fastidiosa subsp. multiplex ST6 and/or ST7 has been detected in Corsica and the Provence-Alpes-Côte d’Azur in almost 70 plant species, whereas X. fastidiosa subsp. pauca ST53 has been found in only two host plants. In this study, we report two new variants,

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Denancé, Legendre, Briand, et al. "Several subspecies and sequence types are associated with the emergence of Xylella fastidiosa in natural settings in France." May 30, 2017. https://doi.org/10.1111/ppa.12695.

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Xylella fastidiosa is a plant pathogenic bacterium emerging in Europe. In France its emergence has been demonstrated through interceptions of contaminated coffee plants and, in 2015, by a survey of natural settings. The first French focus of contamination was detected in 2015 in Corsica; since then, almost 300 foci have been found and nearly 30 plant species have been declared contaminated, with Polygala myrtifolia remaining the principal host, suffering from severe leaf scorch. This study reports on the diversity of X. fastidiosa identified in France in 2015. Multilocus sequence analysis/ typ

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Giampetruzzi, Annalisa, Maria Saponari, Giuliana Loconsole, et al. "Genome-wide analysis provides evidence on the genetic relatedness of the emergent Xylella fastidiosa genotype in Italy to isolates from Central America." April 7, 2017. https://doi.org/10.1094/PHYTO-12-16-0420-R.

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Xylella fastidiosa is a plant pathogenic bacterium recently introduced in Europe that is causing decline in olive trees in the South of Italy. Genetic studies have consistently shown that the bacterial genotype recovered from infected olive trees belongs to the sequence type ST53 within subspecies pauca. This genotype, ST53, has also been reported to occur in Costa Rica. The ancestry of ST53 was recently clarified, showing it contains alleles which are monophyletic with those of subsp. pauca in South America. To more robustly determine the phylogenetic placement of ST53 within X. fastidiosa, w

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Marco-Noales, Ester, Silvia Barbé, Adela Monterde, et al. "Evidence that Xylella fastidiosa is the causal agent of almond leaf scorch disease in Alicante, mainland Spain (Iberian Peninsula)." Plant Disease, May 11, 2021. http://dx.doi.org/10.1094/pdis-03-21-0625-sc.

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In 2017, Xylella fastidiosa, a quarantine plant pathogenic bacterium in Europe, was detected in almond trees associated to leaf scorch symptoms in Alicante, a Mediterranean area in southeastern mainland Spain. The bacterium was detected by serological and molecular techniques, isolated in axenic culture from diseased almond trees, and identified as X. fastidiosa subsp. multiplex ST6. Inoculation experiments on almond plants in greenhouse trials with a characterized strain of X. fastidiosa subsp. multiplex ST6 isolated in the outbreak area have proved that it was able to multiply and systemical

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Cavalieri, Vincenzo, Elisa Fasanelli, Giandomenico Furnari, et al. "Update of the Xylella spp. host plant database – Systematic literature search up to 31 December 2024." EFSA Journal 23, no. 7 (2025). https://doi.org/10.2903/j.efsa.2025.9563.

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Abstract This scientific report provides an update of the Xylella spp. host plant database, aiming to provide information and scientific support to risk assessors, risk managers and researchers dealing with Xylella spp. Upon a mandate of the European Commission, EFSA created and regularly updates a database of host plant species of Xylella spp. The current mandate covers the period 2021–2026. This report is related to the twelfth version of the database published in Zenodo in the EFSA Knowledge Junction community, covering literature published from 1 July 2024 up to 31 December 2024 and recent

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O'Leary, Michael, Luis F. F. Arias-Giraldo, Lindsey Burbank, Leonardo De La Fuente, and Blanca B. Landa. "Complete genome resources for Xylella fastidiosa strains AlmaEM3 and BB08-1 reveal prophage-associated structural variation among blueberry-infecting strains." Phytopathology®, August 24, 2021. http://dx.doi.org/10.1094/phyto-08-21-0317-a.

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Xylella fastidiosa is a gram-negative plant pathogenic bacterium with wide geographical distribution and host range. X. fastidiosa strains are separated into genetically distinct subspecies, and further categorized into sequence types (ST). Genetic characterization of X. fastidiosa strains infecting blueberry has revealed that strains of subspecies multiplex and fastidiosa are capable of causing bacterial leaf scorch disease of blueberry under field conditions. To better elucidate the relationships among blueberry-infecting X. fastidiosa subsp. multiplex strains, we completed the genomes of an

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