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Article
2025
The 16SrXII-P phytoplasma GOE is separated from other stolbur phytoplasmas by key genomic features
The 16SrXII-P phytoplasma GOE is separated from other stolbur phytoplasmas by key genomic features
Abstract
The syndrome “bassess richesses” is a vector-borne disease of sugar beet in Germany. The gammaproteobacterium ‘ Candidatus Arsenophonus phytopathogenicus’ causes reduced sugar content and biomass, growth abnormalities, and yellowing. Co-infection with the 16SrXII-P stolbur phytoplasmas often leads to more severe symptoms and a risk of complete economic loss. This yellowing agent of the Mollicutes class had not been described before, so its differences from other stolbur phytoplasmas remained unanswered. The genome of strain GOE was sequenced, providing a resource to analyze its characteristics. Phylogenetic position was revised, genome organization was compared, and functional reconstructions of metabolic and virulence factors were performed. Average nucleotide identity analysis indicates that GOE represents a new ‘ Ca. Phytoplasma’ species. Our results show that GOE is also distinct from other stolbur phytoplasmas in terms of smaller genome size and G+C content. Its reductive evolution is reflected in conserved membrane protein repertoire and minimal metabolism. The encoding of a riboflavin kinase indicates a lost pathway of phytoplasmas outside the groups 16SrXII and 16SrXIII. GOE shows a complete tra5 transposon harboring orthologs of SAP11, SAP54, and SAP05 effectors indicating an original phytoplasma pathogenicity island. Our results deepen the understanding of phytoplasma evolution and reaffirm the heterogeneity of stolbur phytoplasmas.
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Pathogens, 14 (2025), 2, 180.
https://doi.org/10.3390/pathogens14020180.
ISSN: 2076-0817
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630 Agriculture
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Sustainable Development Goals
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@article{Toth2025,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/17440},
doi = {10.3390/pathogens14020180},
author = {Toth, Rafael and Huettel, Bruno and Varrelmann, Mark et al.},
title = {The 16SrXII-P Phytoplasma GOE Is Separated from Other Stolbur Phytoplasmas by Key Genomic Features},
journal = {Pathogens},
year = {2025},
volume = {14},
number = {2},
}