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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Claims 8
Claim · model-written summary
Groel sequences of Candidatus Phytoplasma ulmi in elm show a high intraspecific homology of more than 99%.
- Taxon
- elme1
- Interactor
- Candidatus Phytoplasma ulmiCandidatus Phytoplasma ulmie1pathogen
- Outcome
- intraspecific homologye2
- Value
- more than 99%e2
Verbatim
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”
e2“While the groEL sequences revealed a high intraspecific homology of more than 99%”
Claim · model-written summary
The imp gene homology of Candidatus Phytoplasma ulmi in elm dropped to 71% between distantly related sequences.
Verbatim
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”
e3“the homology of the imp gene dropped to 71% between distantly related sequences”
Claim · model-written summary
Twenty-nine groEL genotypes of Candidatus Phytoplasma ulmi were distinguished in elm.
Verbatim
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”
e4“Twenty-nine groEL and 74 imp genotypes were distinguished based on polymorphic sites”
Claim · model-written summary
Seventy-four imp genotypes of Candidatus Phytoplasma ulmi were distinguished in elm.
Verbatim
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”
e4“Twenty-nine groEL and 74 imp genotypes were distinguished based on polymorphic sites”
Claim · model-written summary
Phylogenetic analysis of the groEL gene clustered all Candidatus Phytoplasma ulmi strains apart from related 16SrV-group phytoplasmas.
Verbatim
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”
e5“Phylogenetic analysis of the groEL gene clustered all 'Ca. P. ulmi' strains and separated them from related phytoplasmas of the 16SrV group”
Claim · model-written summary
The imp gene phylogeny separated Candidatus Phytoplasma ulmi genotypes into two clusters.
Verbatim
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”
e6“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)”
Claim · model-written summary
Candidatus Phytoplasma ulmi genotypes from Scots elm trees formed a coherent cluster, while genotypes from European white elms and field elms grouped less strictly.
Verbatim
e7“'Ca. P. ulmi' genotypes from Scots elm trees formed a coherent cluster, while genotypes from European white elms and field elms grouped less strictly”
Claim · model-written summary
The regional distribution pattern of Candidatus Phytoplasma ulmi genotypes in elm was congruent for some groEL and imp genotypes.
Verbatim
e0“The regional distribution pattern was congruent for some of the groEL and imp genotypes, but a strict linkage for all genotypes was not apparent”
e1“A recent survey in Germany revealed the wide presence of 'Candidatus Phytoplasma ulmi' in native elm stands”