Parasitism genes and host range disparities in biotrophic nematodes: the conundrum of polyphagy versus specialisation

Vivian C. Blok*, John T. Jones, Mark S. Phillips, David L. Trudgill

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

48 Citations (Scopus)

Abstract

This essay considers biotrophic cyst and root-knot nematodes in relation to their biology, host-parasite interactions and molecular genetics. These nematodes have to face the biological consequences of the physical constraints imposed by the soil environment in which they live while their hosts inhabit both above and below ground environments. The two groups of nematodes appear to have adopted radically different solutions to these problems with the result that one group is a host specialist and reproduces sexually while the other has an enormous host range and reproduces by mitotic parthenogenesis. We consider what is known about the modes of parasitism used by these nematodes and how it relates to their host range, including the surprising finding that parasitism genes in both nematode groups have been recruited from bacteria. The nuclear and mitochondrial genomes of these two nematode groups are very different and we consider how these findings relate to the biology of the organisms.

Original languageEnglish
Pages (from-to)249-259
Number of pages11
JournalBioEssays
Volume30
Issue number3
DOIs
Publication statusPublished - Mar 2008

Keywords

  • ROOT-KNOT NEMATODES
  • PLANT-RESISTANCE GENES
  • MELOIDOGYNE-INCOGNITA
  • GLOBODERA-PALLIDA
  • CYST NEMATODES
  • ARABIDOPSIS-THALIANA
  • MITOCHONDRIAL GENOME
  • CHORISMATE MUTASE
  • EXPRESSION
  • TOMATO

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