<i>Xanthomonas</i>

Saddler, G. S.; Bradbury, J. F.

doi:10.1002/9781118960608.gbm01239

Cited by 4 publications

(3 citation statements)

References 224 publications

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“…Most Xanthomonas spp. strains are characterized by the presence of a membrane-bound pigment “Xanthomonadin” that produces a yellow color in culture media [ 9 , 10 ]. Each Xanthomonas spp., which shows a different host range or produces different disease symptoms is classified as a separate species, while some are further taxonomically classified into different subspecies and pathovars that show a high degree of host plant specificity and tissue specificity, which can involve the host plant vascular system or mesophyll tissues [ 9 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Genetic Divergence and Population Structure of Xanthomonas albilineans Strains Infecting Saccharum spp. Hybrid and Saccharum officinarum

Ntambo

Zhao

et al. 2023

Plants

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Leaf scald caused by Xanthomonas albilineans (Xa) is a major bacterial disease in sugarcane that represents a threat to the global sugar industry. Little is known about the population structure and genetic evolution of this pathogen. In this study, 39 Xa strains were collected from 6 provinces in China. Of these strains, 15 and 24 were isolated from Saccharum spp. hybrid and S. officinarum plants, respectively. Based on multilocus sequence analysis (MLSA), with five housekeeping genes, these strains were clustered into two distinct phylogenetic groups (I and II). Group I included 26 strains from 2 host plants, Saccharum spp. hybrid and S. officinarum collected from 6 provinces, while Group II consisted of 13 strains from S. officinarum plants in the Zhejiang province. Among the 39 Xa strains, nucleotide sequence identities from 5 housekeeping genes were: ABC (99.6–100%), gyrB (99.3–100%), rpoD (98.4–100%), atpD (97.0–100%), and glnA (97.6–100%). These strains were clustered into six groups (A–F), based on the rep-PCR fingerprinting, using primers for ERIC2, BOX A1R, and (GTG)5. UPGMA and PCoA analyses revealed that group A had the most strains (24), followed by group C with 11 strains, while there was 1 strain each in groups B and D–F. Neutral tests showed that the Xa population in S. officinarum had a trend toward population expansion. Selection pressure analysis showed purification selection on five concatenated housekeeping genes from all tested strains. Significant genetic differentiation and infrequent gene flow were found between two Xa populations hosted in Saccharum spp. hybrids and S. officinarum. Altogether, these results provide evidence of obvious genetic divergence and population structures among Xa strains from China.

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Section: Introductionmentioning

confidence: 99%

Genetic Divergence and Population Structure of Xanthomonas albilineans Strains Infecting Saccharum spp. Hybrid and Saccharum officinarum

Ntambo

Zhao

et al. 2023

Plants

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“…hortorum strains are readily isolated from infected plant tissue using serial dilution plating. Growth media used can be nonselective (e.g., nutrient agar, sucrose peptone, or yeast‐dextrose‐calcium carbonate [YDC] agar) or semiselective (Saddler & Bradbury, 2015). Irrespective of medium type, X .…”

Section: Identification and Detectionmentioning

confidence: 99%

“…Irrespective of medium type, X . hortorum colonies are yellow, mucoid, and convex (Saddler & Bradbury, 2015).…”

Section: Identification and Detectionmentioning

confidence: 99%

Xanthomonas hortorum – beyond gardens: Current taxonomy, genomics, and virulence repertoires

Dia

Morinière

Cottyn³

et al. 2022

Molecular Plant Pathology

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Taxonomy Bacteria; Phylum Proteobacteria; Class Gammaproteobacteria; Order Lysobacterales (earlier synonym of Xanthomonadales); Family Lysobacteraceae (earlier synonym of Xanthomonadaceae); Genus Xanthomonas; Species X. hortorum; Pathovars: pv. carotae, pv. vitians, pv. hederae, pv. pelargonii, pv. taraxaci, pv. cynarae, and pv. gardneri. Host range Xanthomonas hortorum affects agricultural crops, and horticultural and wild plants. Tomato, carrot, artichoke, lettuce, pelargonium, ivy, and dandelion were originally described as the main natural hosts of the seven separate pathovars. Artificial inoculation experiments also revealed other hosts. The natural and experimental host ranges are expected to be broader than initially assumed. Additionally, several strains, yet to be assigned to a pathovar within X. hortorum, cause diseases on several other plant species such as peony, sweet wormwood, lavender, and oak‐leaf hydrangea. Epidemiology and control X. hortorum pathovars are mainly disseminated by infected seeds (e.g., X. hortorum pvs carotae and vitians) or cuttings (e.g., X. hortorum pv. pelargonii) and can be further dispersed by wind and rain, or mechanically transferred during planting and cultivation. Global trade of plants, seeds, and other propagating material constitutes a major pathway for their introduction and spread into new geographical areas. The propagules of some pathovars (e.g., X. horturum pv. pelargonii) are spread by insect vectors, while those of others can survive in crop residues and soils, and overwinter until the following growing season (e.g., X. hortorum pvs vitians and carotae). Control measures against X. hortorum pathovars are varied and include exclusion strategies (i.e., by using certification programmes and quarantine regulations) to multiple agricultural practices such as the application of phytosanitary products. Copper‐based compounds against X. hortorum are used, but the emergence of copper‐tolerant strains represents a major threat for their effective management. With the current lack of efficient chemical or biological disease management strategies, host resistance appears promising, but is not without challenges. The intrastrain genetic variability within the same pathovar poses a challenge for breeding cultivars with durable resistance. Useful websites https://gd.eppo.int/taxon/XANTGA, https://gd.eppo.int/taxon/XANTCR, https://gd.eppo.int/taxon/XANTPE, https://www.euroxanth.eu, http://www.xanthomonas.org, http://www.xanthomonas.org/dokuwiki

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Development of molecular driven screening for desulfurizing microorganisms targeting the dszB desulfinase gene

Duval

Cravo‐Laureau

Poinel³

et al. 2021

Research in Microbiology

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Xanthomonas

Cited by 4 publications

References 224 publications

Genetic Divergence and Population Structure of Xanthomonas albilineans Strains Infecting Saccharum spp. Hybrid and Saccharum officinarum

Genetic Divergence and Population Structure of Xanthomonas albilineans Strains Infecting Saccharum spp. Hybrid and Saccharum officinarum

Xanthomonas hortorum – beyond gardens: Current taxonomy, genomics, and virulence repertoires

Development of molecular driven screening for desulfurizing microorganisms targeting the dszB desulfinase gene

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