Host specificity and differential pathogenicity of pectobacterium strains from dicot and monocot hosts

Nirmal Khadka, Janak Raj Joshi, Noam Reznik, Nofar Chriker, Adi Nudel, Einat Zelinger, Zohar Kerem*, Iris Yedidia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Recent phylogenetic studies have transferred certain isolates from monocot plants previously included in the heterogeneous group of Pectobacterium carotovorum (Pc) to a species level termed Pectobacterium aroidearum. The specificity of Pectobacterium associated infections had received less attention, and may be of high scientific and economic importance. Here, we have characterized differential responses of Pectobacterium isolates from potato (WPP14) and calla lily (PC16) on two typical hosts: Brassica oleracea var. capitata (cabbage) a dicot host; and Zantedeschia aethiopica (calla lily) a monocot host. The results revealed clear host specific responses following infection with the two bacterial strains. This was demonstrated by differential production of volatile organic compounds (VOCs) and the expression of plant defense-related genes (pal, PR-1, lox2, ast). A related pattern was observed in bacterial responses to each of the host’s extract, with differential expression of virulence-related determinants and genes associated with quorum-sensing and plant cell wall-degrading enzymes. The differences were associated with each strain’s competence on its respective host.

Original languageAmerican English
Article number1479
Pages (from-to)1-22
Number of pages22
Issue number10
StatePublished - Oct 2020

Bibliographical note

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.


  • Differential virulence
  • Host extracts
  • Host specificity
  • Pectobacterium
  • Plant defense


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