The Plant Pathology Journal

The Korean Society of Plant Pathology (한국식물병리학회)
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Comparative Analyses of Four Complete Genomes in Pseudomonas amygdali Revealed Differential Adaptation to Hostile Environments and Secretion Systems

  • Jung, Hyejung (Department of Integrated Biological Science, Pusan National University) ;
  • Kim, Hong-Seop (Korea Seed & Variety Service) ;
  • Han, Gil (Department of Integrated Biological Science, Pusan National University) ;
  • Park, Jungwook (Department of Integrated Biological Science, Pusan National University) ;
  • Seo, Young-Su (Department of Integrated Biological Science, Pusan National University)
  • Received : 2021.11.30
  • Accepted : 2022.03.10
  • Published : 2022.04.01
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Abstract

Pseudomonas amygdali is a hemibiotrophic phytopathogen that causes disease in woody and herbaceous plants. Complete genomes of four P. amygdali pathovars were comparatively analyzed to decipher the impact of genomic diversity on host colonization. The pan-genome indicated that 3,928 core genes are conserved among pathovars, while 504-1,009 are unique to specific pathovars. The unique genome contained many mobile elements and exhibited a functional distribution different from the core genome. Genes involved in O-antigen biosynthesis and antimicrobial peptide resistance were significantly enriched for adaptation to hostile environments. While the type III secretion system was distributed in the core genome, unique genomes revealed a different organization of secretion systems as follows: type I in pv. tabaci, type II in pv. japonicus, type IV in pv. morsprunorum, and type VI in pv. lachrymans. These findings provide genetic insight into the dynamic interactions of the bacteria with plant hosts.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (2019R1A2C2006779) and by a grant from the Nakdonggang National Institute of Biological Resources (NNIBR), funded by the Ministry of Environment(MOE) of the Republic of Korea (NNIBR202202108).

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