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<p>Soft Rot Pectobacteriaceae (SRP), especially Dickeya species, are among the most damaging bacterial pathogens of potatoes, causing blackleg and soft rot in temperate and colder environments. Recently, <i>Dickeya solani</i> has become the leading potato pathogen in Europe and Russia, gradually replacing previously common species like Dickeya dadantii. This review combines epidemiological, physiological, transcriptomic, and comparative genomic data to explain <i>D. solani</i> ‘s ecological success and temperature adaptation. A structured review of published studies addresses pathogen emergence, population structure, virulence regulation, temperature-dependent gene expression, and genome structure. Comparative genomics indicates that <i>D. solani</i> and <i>D. dadantii</i> share a highly conserved virulence core, including enzymes that degrade plant cell walls, secretion systems, and motility functions. However, <i>D. solani</i> has a more stable accessory genome, rich in pathways for metabolism, stress response, and secondary metabolites, which enhance its competitiveness. Transcriptomic studies reveal that small sets of temperature-responsive genes, particularly those controlled by global regulators such as PecT, PecS, and KdgR, as well as quorum-sensing systems, significantly affect virulence, motility, and secretion. These regulatory networks allow temperature-controlled virulence, lower inoculum requirements, and persistence in variable seasonal conditions. The review also points to environmental reservoirs, seed trade, and climate variability as key factors in disease cycles. Overall, <i>D. solani</i> ‘s dominance likely stems from its regulatory adaptability and ecological optimization, rather than from the acquisition of new virulence genes. Combining comparative genomics with climate-aware diagnostics and surveillance is crucial for predicting disease outbreaks amid ongoing climate change.</p>

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Comparative genomics studies on Dickeya Solani and D. dadantii and its adaptation to cold tolerance in potato: a review

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月10日

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  • Riad Saidu Koroma,
  • Francess Sia Saquee,
  • Dooshima Rita Dugeri,
  • Elena Pakina,
  • Aleksandr N. Ignatov,
  • Prince Emmanuel Norman

摘要

Soft Rot Pectobacteriaceae (SRP), especially Dickeya species, are among the most damaging bacterial pathogens of potatoes, causing blackleg and soft rot in temperate and colder environments. Recently, Dickeya solani has become the leading potato pathogen in Europe and Russia, gradually replacing previously common species like Dickeya dadantii. This review combines epidemiological, physiological, transcriptomic, and comparative genomic data to explain D. solani ‘s ecological success and temperature adaptation. A structured review of published studies addresses pathogen emergence, population structure, virulence regulation, temperature-dependent gene expression, and genome structure. Comparative genomics indicates that D. solani and D. dadantii share a highly conserved virulence core, including enzymes that degrade plant cell walls, secretion systems, and motility functions. However, D. solani has a more stable accessory genome, rich in pathways for metabolism, stress response, and secondary metabolites, which enhance its competitiveness. Transcriptomic studies reveal that small sets of temperature-responsive genes, particularly those controlled by global regulators such as PecT, PecS, and KdgR, as well as quorum-sensing systems, significantly affect virulence, motility, and secretion. These regulatory networks allow temperature-controlled virulence, lower inoculum requirements, and persistence in variable seasonal conditions. The review also points to environmental reservoirs, seed trade, and climate variability as key factors in disease cycles. Overall, D. solani ‘s dominance likely stems from its regulatory adaptability and ecological optimization, rather than from the acquisition of new virulence genes. Combining comparative genomics with climate-aware diagnostics and surveillance is crucial for predicting disease outbreaks amid ongoing climate change.