Planta

, Volume 210, Issue 6, pp 853–864

The hypersensitive response is associated with host and nonhost resistance to Phytophthora infestans

  • Vivianne G. A. A. Vleeshouwers
  • Willem van Dooijeweert
  • Francine Govers
  • Sophien Kamoun
  • Leontine T. Colon

Abstract.

The interaction between Phytophthora infestans (Mont.) de Bary and Solanum was examined cytologically using a diverse set of wild Solanum species and potato (S. tuberosum L.) cultivars with various levels of resistance to late blight. In wild Solanum species, in potato cultivars carrying known resistance (R) genes and in nonhosts the major defense reaction appeared to be the hypersensitive response (HR). In fully resistant Solanum species and nonhosts, the HR was fast and occurred within 22 h. This resulted in the death of one to three cells. In partially resistant clones, the HR was induced between 16 and 46 h, and resulted in HR lesions consisting of five or more dead cells, from which hyphae were occasionally able to escape to establish a biotrophic interaction. These results demonstrate the quantitative nature of the resistance to P. infestans. The effectiveness of the HR in restricting growth of the pathogen differed considerably between clones and correlated with resistance levels. Other responses associated with the defense reaction were deposition of callose and extracellular globules containing phenolic compounds. These globules were deposited near cells showing the HR, and may function in cell wall strengthening.

Key words: Hypersensitive response – Nonhost resistance – Phenolic compound –Phytophthora– Resistance (R) genes –Solanum (disease resistance) 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Vivianne G. A. A. Vleeshouwers
    • 1
  • Willem van Dooijeweert
    • 1
  • Francine Govers
    • 2
  • Sophien Kamoun
    • 2
  • Leontine T. Colon
    • 1
  1. 1.Plant Research International, Wageningen University and Research Center, P.O. Box 16, 6700 AA Wageningen, The NetherlandsNL
  2. 2.Laboratory of Phytopathology, Wageningen University, Wageningen University and Research Center, Binnenhaven 9, 6709 PD Wageningen, The NetherlandsNL
  3. 3.Graduate School Experimental Plant Sciences, Wageningen, The NetherlandsNL

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