PLoS ONE (2017) 12 (2 - e0171531)

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Jinhui Wang, Minna Haapalainen, Thomas Schott, Sarah M. Thompson, Grant R. Smith, Anne I. Nissinen and Minna Pirhonen (2017)
Genomic sequence of ´ Candidatus Liberibacter solanacearum' haplotype C and its comparison with haplotype A and B genomes
PLoS ONE 12 (2 - e0171531)
Abstract: Haplotypes A and B of ' Candidatus Liberibacter solanacearum' (CLso) are associated with diseases of solanaceous plants, especially Zebra chip disease of potato, and haplotypes C, D and E are associated with symptoms on apiaceous plants. To date, one complete genome of haplotype B and two high quality draft genomes of haplotype A have been obtained for these unculturable bacteria using metagenomics from the psyllid vector Bactericera cockerelli. Here, we present the first genomic sequences obtained for the carrot-associated CLso. These two genomic sequences of haplotype C, FIN114 (1.24 Mbp) and FIN111 (1.20 Mbp), were obtained from carrot psyllids (Trioza apicalis) harboring CLso. Genomic comparisons between the haplotypes A, B and C revealed that the genome organization differs between these haplotypes, due to large inversions and other recombinations. Comparison of protein-coding genes indicated that the core genome of CLso consists of 885 ortholog groups, with the pan-genome consisting of 1327 ortholog groups. Twenty-seven ortholog groups are unique to CLso haplotype C, whilst 11 ortholog groups shared by the haplotypes A and B, are not found in the haplotype C. Some of these ortholog groups that are not part of the core genome may encode functions related to interactions with the different host plant and psyllid species.
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Database assignments for author(s): Minna Pirhonen, Minna Haapalainen, Grant R. Smith, Anne Nissinen

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
transmission/dispersal of plant diseases

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Liberibacter solanacearum Carrot (Daucus carota) Finland