Candidate genes expression profiling during wilting in chickpea caused by Fusarium oxysporum f. sp. ciceris race 5

PLoS One. 2019 Oct 23;14(10):e0224212. doi: 10.1371/journal.pone.0224212. eCollection 2019.

Abstract

Chickpea production may be seriously threatened by Fusarium wilt, a disease caused by the soil-borne fungus Fusarium oxysporum f. sp. ciceris. F. oxysporum race 5 is the most important race in the Mediterranean basin. Recently, the region responsible for resistance race 5 has been delimited within a region on chromosome 2 that spans 820 kb. To gain a better understanding of this genomic region, we used a transcriptomic approach based on quantitative real-time PCR to analyze the expression profiles of 22 selected candidate genes. We used a pair of near-isogenic lines (NILs) differing in their sensitivity to Fusarium race 5 (resistant vs susceptible) to monitor the transcriptional changes over a time-course experiment (24, 48, and 72 hours post inoculation, hpi). Qualitative differences occurred during the timing of regulation. A cluster of 12 genes were induced by the resistant NIL at 24 hpi, whereas a second cluster contained 9 genes induced by the susceptible NIL at 48 hpi. Their possible functions in the molecular defence of chickpea is discussed. Our study provides new insight into the molecular defence against Fusarium race 5 and demonstrates that development of NILs is a rich resource to facilitate the detection of candidate genes. The new genes regulated here may be useful against other Fusarium races.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cicer / genetics*
  • Cicer / metabolism
  • Cicer / microbiology*
  • Fusarium / pathogenicity*
  • Gene Expression Profiling*
  • Gene Expression Regulation, Plant
  • Host-Pathogen Interactions*
  • Immunity, Innate
  • Plant Diseases / genetics*
  • Plant Diseases / microbiology
  • Plant Proteins / genetics
  • Plant Proteins / metabolism*
  • Plant Roots / genetics
  • Plant Roots / metabolism
  • Plant Roots / microbiology

Substances

  • Plant Proteins

Grants and funding

This work has been supported by INIA project RTA2017-00041 co-financed by the European Union through the ERDF2014–2020 “Programa Operativo de Crecimiento Inteligente”. PC and JVD are supported by the “Plan Propio de Investigación de la Universidad de Córdoba” and the EU “Programa Operativo de fondos FEDER Andalucía”. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.