ArticleScientific reports2020
Genetic variation, phylogenetic relationship and spatial distribution of 'Candidatus Phytoplasma ulmi' strains in Germany.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Imp Gene Analysis for Diagnosis and Genotyping of Flavescence Dorée Related Phytoplasmas.Methods in molecular biology (Clifton, N.J.) · 2026Article
- A Witches'-Broom Disease of Cultivated Strawberry Associated with 'Plants (Basel, Switzerland) · 2025Article
- Occurrence, Impact, and Multilocus Sequence Analysis of Alder Yellows Phytoplasma Infecting Common Alder and Italian Alder in Southern Italy.Microorganisms · 2024Article
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Authors and funding
4 authors.
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No grant is acknowledged in the PubMed record.
Abstract
A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands. Accessions were studied for their genetic variability and phylogenetic relationship based on the conserved groEL and the variable imp gene. While the groEL sequences revealed a high intraspecific homology of more than 99%, the homology of the imp gene dropped to 71% between distantly related sequences. Twenty-nine groEL and 74 imp genotypes were distinguished based on polymorphic sites. Phylogenetic analysis of the groEL gene clustered all 'Ca. P. ulmi' strains and separated them from related phytoplasmas of the 16SrV group. The inferred phylogeny of the imp gene resulted in a different tree topology and separated the 'Ca. P. ulmi' genotypes into two clusters, one closely related to the flavescence dorée phytoplasma strain FD-D (16SrV-D), the other affiliated with the flavescence dorée phytoplasma strains FD-C and FD70 and the alder yellows phytoplasma (16SrV-C). In both phylograms, 'Ca. P. ulmi' genotypes from Scots elm trees formed a coherent cluster, while genotypes from European white elms and field elms grouped less strictly. The regional distribution pattern was congruent for some of the groEL and imp genotypes, but a strict linkage for all genotypes was not apparent.
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