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Rahnella victoriana sp. nov., Rahnella bruchi sp. nov., Rahnella woolbedingensis sp. nov., classification of Rahnella genomospecies 2 and 3 as Rahnella variigena sp. nov. and Rahnella inusitata sp. nov., respectively and emended description of the genus Rahnella (2014)
Journal Article
Brady, C., Hunter, G., Kirk, S., Arnold, D. L., & Denman, S. (2014). Rahnella victoriana sp. nov., Rahnella bruchi sp. nov., Rahnella woolbedingensis sp. nov., classification of Rahnella genomospecies 2 and 3 as Rahnella variigena sp. nov. and Rahnella inusitata sp. nov., respectively and emended description of the genus Rahnella. Systematic and Applied Microbiology, 37(8), 545-552. https://doi.org/10.1016/j.syapm.2014.09.001

© 2014 Published by Elsevier GmbH. Isolations from oak symptomatic of Acute Oak Decline, alder and walnut log tissue, and buprestid beetles in 2009-2012 yielded 32 Gram-negative bacterial strains showing highest gyrB sequence similarity to Rahnella a... Read More about Rahnella victoriana sp. nov., Rahnella bruchi sp. nov., Rahnella woolbedingensis sp. nov., classification of Rahnella genomospecies 2 and 3 as Rahnella variigena sp. nov. and Rahnella inusitata sp. nov., respectively and emended description of the genus Rahnella.

Gibbsiella greigii sp. nov., a novel species associated with oak decline in the USA (2014)
Journal Article
Brady, C., Hunter, G., Kirk, S., Arnold, D. L., & Denman, S. (2014). Gibbsiella greigii sp. nov., a novel species associated with oak decline in the USA. Systematic and Applied Microbiology, 37(6), 417-422. https://doi.org/10.1016/j.syapm.2014.07.002

In 2010, cream-coloured, Gram-negative staining, facultatively anaerobic enterobacteria were isolated from a single black oak tree (Quercus kelloggii) exhibiting decline symptoms in southern California, USA. These 12 isolates were tentatively identif... Read More about Gibbsiella greigii sp. nov., a novel species associated with oak decline in the USA.

Description of Brenneria roseae sp. nov. and two subspecies, Brenneria roseae subspecies roseae ssp. nov and Brenneria roseae subspecies americana ssp. nov. isolated from symptomatic oak (2014)
Journal Article
Brady, C., Hunter, G., Kirk, S., Arnold, D. L., & Denman, S. (2014). Description of Brenneria roseae sp. nov. and two subspecies, Brenneria roseae subspecies roseae ssp. nov and Brenneria roseae subspecies americana ssp. nov. isolated from symptomatic oak. Systematic and Applied Microbiology, 37(6), 396-401. https://doi.org/10.1016/j.syapm.2014.04.005

Gram-negative, facultatively anaerobic bacteria were isolated from symptomatic oak tissue in the UK and USA. Partial gyrB sequencing placed ten strains in the genus Brenneria, with B. goodwinii as the closest phylogenetic relative. The strains were i... Read More about Description of Brenneria roseae sp. nov. and two subspecies, Brenneria roseae subspecies roseae ssp. nov and Brenneria roseae subspecies americana ssp. nov. isolated from symptomatic oak.

Draft genome sequence of Pseudomonas corrugata, a phytopathogenic bacterium with potential industrial applications (2014)
Journal Article
Licciardello, G., Jackson, R. W., Bella, P., Strano, C. P., Catara, A. F., Arnold, D. L., …Catara, V. (2014). Draft genome sequence of Pseudomonas corrugata, a phytopathogenic bacterium with potential industrial applications. Journal of Biotechnology, 175(1), 65-66. https://doi.org/10.1016/j.jbiotec.2014.02.003

Pseudomonas corrugata was first described as the causal agent of a tomato disease called 'pith necrosis' yet it is considered as a biological resource in various fields such as biocontrol of plant diseases and production of industrially promising mic... Read More about Draft genome sequence of Pseudomonas corrugata, a phytopathogenic bacterium with potential industrial applications.

The rulB gene of plasmid pWW0 is a hotspot for the site-specific insertion of integron-like elements found in the chromosomes of environmental Pseudomonas fluorescens group bacteria (2013)
Journal Article
Pickup, R. W., Jackson, R. W., Rhodes, G., Bosma, H., Studholme, D., & Arnold, D. L. (2014). The rulB gene of plasmid pWW0 is a hotspot for the site-specific insertion of integron-like elements found in the chromosomes of environmental Pseudomonas fluorescens group bacteria. Environmental Microbiology, 16(8), 2374-2388. https://doi.org/10.1111/1462-2920.12345

Summary: The rulAB operon of Pseudomonas spp. confers fitness traits on the host and has been suggested to be a hotspot for insertion of mobile elements that carry avirulence genes. Here, for the first time, we show that rulB on plasmid pWW0 is a hot... Read More about The rulB gene of plasmid pWW0 is a hotspot for the site-specific insertion of integron-like elements found in the chromosomes of environmental Pseudomonas fluorescens group bacteria.

In planta induced changes in the native plasmid profile of Pseudomonas syringae pathover phaseolicola strain 1302A (2013)
Journal Article
Slater, R. T., Neale, H. C., Neale, H., Slater, R., Mayne, L. M., Manoharan, B., & Arnold, D. L. (2013). In planta induced changes in the native plasmid profile of Pseudomonas syringae pathover phaseolicola strain 1302A. Plasmid, 70(3), 420-424. https://doi.org/10.1016/j.plasmid.2013.07.002

Pseudomonas syringae pv. phaseolicola (Pph) strain 1302A, a causative agent of halo blight in the common bean Phaseolus vulgaris, contains four native plasmids designated pAV505 (150. kb), pAV506 (50. kb), pAV507 (47. kb) and pAV508 (42. kb). Pph 130... Read More about In planta induced changes in the native plasmid profile of Pseudomonas syringae pathover phaseolicola strain 1302A.

A Pseudomonas syringae diversity survey reveals a differentiated phylotype of the pathovar syringae associated with the mango host and mangotoxin production (2013)
Journal Article
De Vicente, A., Cazorla, F. M., Arrebola, E., Murillo, J., Carrión, V. J., Gutiérrez-Barranquero, J. A., …Arnold, D. L. (2013). A Pseudomonas syringae diversity survey reveals a differentiated phylotype of the pathovar syringae associated with the mango host and mangotoxin production. Phytopathology, 103(11), 1115-1129. https://doi.org/10.1094/PHYTO-04-13-0093-R

Pseudomonas syringae pv. syringae, the causal agent of bacterial apical necrosis (BAN) in mango crops, has been isolated in different mango-producing areas worldwide. An extensive collection of 87 P. syringae pv. syringae strains isolated from mango... Read More about A Pseudomonas syringae diversity survey reveals a differentiated phylotype of the pathovar syringae associated with the mango host and mangotoxin production.

Suppression of Microdochium nivale by potassium phosphite in cool-season turfgrasses (2012)
Journal Article
Dempsey, J. J., Wilson, I. D., Spencer-Phillips, P. T., & Arnold, D. L. (2012). Suppression of Microdochium nivale by potassium phosphite in cool-season turfgrasses. Acta Agriculturae Scandinavica, Section B - Soil and Plant Science, 62(SUPPL.1), 70-78. https://doi.org/10.1080/09064710.2012.681392

Microdochium nivale (Fr.) Samuels and Hallett (teleomorph Monographella nivalis (Schafnitt) is one of the most damaging pathogens of cool-season amenity turfgrasses. The search for new or improved means to reduce susceptibility to M. nivale is an ong... Read More about Suppression of Microdochium nivale by potassium phosphite in cool-season turfgrasses.

Engaging teenagers with genetics and genomics through a school-based competition: Pilot evaluation (2012)
Journal Article
Weitkamp, E., & Arnold, D. L. (2012). Engaging teenagers with genetics and genomics through a school-based competition: Pilot evaluation. International Journal of Science and Society, 4(1), 63-68

As part of a university outreach programme, the authors ran an interschool competition encouraging young people (year 10, age 14–15) to explore their ideas about the likely social impacts of whole genome screening. Schools participating in the comp... Read More about Engaging teenagers with genetics and genomics through a school-based competition: Pilot evaluation.

Pseudomonas syringae pv. phaseolicola: From 'has bean' to supermodel (2011)
Journal Article
Jackson, R. W., Lovell, H. C., Arnold, D. L., & Mansfield, J. W. (2011). Pseudomonas syringae pv. phaseolicola: From 'has bean' to supermodel. Molecular Plant Pathology, 12(7), 617-627. https://doi.org/10.1111/j.1364-3703.2010.00697.x

Pseudomonas syringae pv. phaseolicola causes halo blight of the common bean, Phaseolus vulgaris, worldwide and remains difficult to control. Races of the pathogen cause either disease symptoms or a resistant hypersensitive response on a series of dif... Read More about Pseudomonas syringae pv. phaseolicola: From 'has bean' to supermodel.

Bacterial genomes: Evolution of pathogenicity (2011)
Journal Article
Arnold, D. L., & Jackson, R. W. (2011). Bacterial genomes: Evolution of pathogenicity. Current Opinion in Plant Biology, 14(4), 385-391. https://doi.org/10.1016/j.pbi.2011.03.001

Bacterial pathogens continue to pose a major threat to economically important plant resources. Disease outbreaks can occur through rapid evolution of a pathogen to overcome host defences. The advent of genome sequencing, especially next-generation te... Read More about Bacterial genomes: Evolution of pathogenicity.

The stealth episome: Suppression of gene expression on the excised genomic island PPHGI-1 from Pseudomonas syringae pv. phaseolicola (2011)
Journal Article
Lovell, H. C., Godfrey, S. A., Mansfield, J. W., Corry, D., Jackson, R. W., & Arnold, D. L. (2011). The stealth episome: Suppression of gene expression on the excised genomic island PPHGI-1 from Pseudomonas syringae pv. phaseolicola. PLoS Pathogens, 7(3), https://doi.org/10.1371/journal.ppat.1002010

Pseudomonas syringae pv. phaseolicola is the causative agent of halo blight in the common bean, Phaseolus vulgaris. P. syringae pv. phaseolicola race 4 strain 1302A contains the avirulence gene avrPphB (syn. hopAR1), which resides on PPHGI-1, a 106 k... Read More about The stealth episome: Suppression of gene expression on the excised genomic island PPHGI-1 from Pseudomonas syringae pv. phaseolicola.

In planta conditions induce genomic changes in Pseudomonas syringae pv. phaseolicola (2011)
Journal Article
Godfrey, S. A., Lovell, H. C., Jackson, R. W., Mansfield, J. W., Hancock, J. T., Desikan, R., & Arnold, D. L. (2011). In planta conditions induce genomic changes in Pseudomonas syringae pv. phaseolicola. Molecular Plant Pathology, 12(2), 167-176. https://doi.org/10.1111/j.1364-3703.2010.00658.x

The co-evolution of bacterial plant pathogens and their hosts is a complex and dynamic process. Plant resistance can impose stress on invading pathogens that can lead to, and select for, beneficial changes in the bacterial genome. The Pseudomonas syr... Read More about In planta conditions induce genomic changes in Pseudomonas syringae pv. phaseolicola.

Bacterial pathogen evolution: Breaking news (2011)
Journal Article
Jackson, R. W., Johnson, L. J., Clarke, S. R., & Arnold, D. L. (2011). Bacterial pathogen evolution: Breaking news. Trends in Genetics, 27(1), 32-40. https://doi.org/10.1016/j.tig.2010.10.001

The immense social and economic impact of bacterial pathogens, from drug-resistant infections in hospitals to the devastation of agricultural resources, has resulted in major investment to understand the causes and consequences of pathogen evolution.... Read More about Bacterial pathogen evolution: Breaking news.

Confocal imaging of pseudomonas syringae pv. phaseolicola colony development in bean reveals reduced multiplication of strains containing the genomic island PPHGI-1 (2010)
Journal Article
Mansfield, J. W., Godfrey, S., Mansfield, J. W., Corry, D., Lovell, H., Jackson, R., & Arnold, D. L. (2010). Confocal imaging of pseudomonas syringae pv. phaseolicola colony development in bean reveals reduced multiplication of strains containing the genomic island PPHGI-1. Molecular Plant-Microbe Interactions, 23(10), 1294-1302. https://doi.org/10.1094/MPMI-05-10-0114

Pseudomonas syringae pv. phaseolicola is the seed borne causativeagent of halo blight in the common bean Phaseolus vulgaris. Pseudomonas syringae pv. phaseolicola race 4 strain 1302A contains the avirulence gene hopAR1 (located on a 106-kb genomic is... Read More about Confocal imaging of pseudomonas syringae pv. phaseolicola colony development in bean reveals reduced multiplication of strains containing the genomic island PPHGI-1.

Comparative genome analysis provides insights into the evolution and adaptation of Pseudomonas syringae pv. aesculi on Aesculus hippocastanum (2010)
Journal Article
Laue, B. E., Studholme, D. J., Green, S., Dorati, F., Lovell, H., Arnold, D. L., …Kamoun, S. (2010). Comparative genome analysis provides insights into the evolution and adaptation of Pseudomonas syringae pv. aesculi on Aesculus hippocastanum. PLoS ONE, 5(4), e10224. https://doi.org/10.1371/journal.pone.0010224

A recently emerging bleeding canker disease, caused by Pseudomonas syringae pathovar aesculi (Pae), is threatening European horse chestnut in northwest Europe. Very little is known about the origin and biology of this new disease. We used the nucleot... Read More about Comparative genome analysis provides insights into the evolution and adaptation of Pseudomonas syringae pv. aesculi on Aesculus hippocastanum.

Bacterial Evolution by Genomic Island Transfer Occurs via DNA Transformation In Planta (2009)
Journal Article
Godfrey, S. A. C., Lovell, H. C., Mansfield, J. W., Jackson, R. W., Hancock, J. T., & Arnold, D. L. (2009). Bacterial Evolution by Genomic Island Transfer Occurs via DNA Transformation In Planta. Current Biology, 19(18), 1586-1590. https://doi.org/10.1016/j.cub.2009.08.018

Our understanding of the evolution of microbial pathogens has been advanced by the discovery of "islands" of DNA that differ from core genomes and contain determinants of virulence [1, 2]. The acquisition of genomic islands (GIs) by horizontal gene t... Read More about Bacterial Evolution by Genomic Island Transfer Occurs via DNA Transformation In Planta.