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• Studholme, D
• Wasukira, A
• Paszkiewicz, K
• Aritua, V
• Thwaites, R
• Smith, J
• Grant, M
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• Studholme, D
• Wasukira, A
• Paszkiewicz, K
• Aritua, V
• Thwaites, R
• Smith, J
• Grant, M
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• Wasukira, A
• Paszkiewicz, K
• Aritua, V
• Thwaites, R
• Smith, J
• Grant, M

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Genes 2011, 2(4), 1050-1065; doi:10.3390/genes2041050

Communication

Draft Genome Sequences of Xanthomonas sacchari and Two Banana-Associated Xanthomonads Reveal Insights into the Xanthomonas Group 1 Clade

David J. Studholme ^1,* , Arthur Wasukira ^1,2 , Konrad Paszkiewicz ¹ , Valente Aritua ^2,3,† , Richard Thwaites ³ , Julian Smith ³  and Murray Grant ¹

¹ Department of Biosciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter, EX4 4QD, UK ² National Crops Resources Research Institute (NaCRRI), P.O. Box 7084, Kampala, Uganda ³ The Food and Environment Research Agency, Sand Hutton, York, YO41 1LZ, UK ^† Present address: Department of Plant Pathology, Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred 33850, FL, USA.

* Author to whom correspondence should be addressed.

Received: 23 October 2011; in revised form: 4 November 2011 / Accepted: 21 November 2011 / Published: 2 December 2011

(This article belongs to the Special Issue Genes and Genomes of Plant Pathogenic Bacteria)

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Abstract: We present draft genome sequences for three strains of Xanthomonas species, each of which was associated with banana plants (Musa species) but is not closely related to the previously sequenced banana-pathogen Xanthomonas campestris pathovar musacearum. Strain NCPPB4393 had been deposited as Xanthomonas campestris pathovar musacearum but in fact falls within the species Xanthomonas sacchari. Strain NCPPB1132 is more distantly related to Xanthomonas sacchari whilst strain NCPPB 1131 grouped in a distinct species-level clade related to X. sacchari, along with strains from ginger, rice, cotton and sugarcane. These three newly sequenced strains share many genomic features with the previously sequenced Xanthomonas albilineans, for example possessing an unsual metE allele and lacking the Hrp type III secretion system. However, they are distinct from Xanthomonas albilineans in many respects, for example showing little evidence of genome reduction. They also lack the SPI-1 type III secretion system found in Xanthomonas albilineans. Unlike X. albilineans, all three strains possess a gum gene cluster. The data reported here provide the first genome-wide survey of non-Hrp Xanthomonas species other than Xanthomonas albilineans, which is an atypical member of this group. We hope that the availability of complete sequence data for this group of organisms is the first step towards understanding their interactions with plants and identifying potential virulence factors.

Keywords: banana; Xanthomonas; genome

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  A correction was published on 11 January 2012 http://www.mdpi.com/2073-4425/3/1/88/ (PDF, 145 KB)

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