Response of Quercus ilex seedlings to Phytophthora spp. root infection in a soil infestation test

  • Beatriz Mora-SalaEmail author
  • Paloma Abad-Campos
  • Mónica Berbegal


Phytophthora species are the main agents associated with oak (Quercus spp.) decline, together with the changing environmental conditions and the intensive land use. The aim of this study was to evaluate the susceptibility of Quercus ilex to the inoculation with eight Phytophthora species. Seven to eight month old Q. ilex seedlings grown from acorns, obtained from two Spanish origins, were inoculated with P. cinnamomi, P. cryptogea, P. gonapodyides, P. megasperma, P. nicotianae, P. plurivora, P. psychrophila and P. quercina. All Phytophthora inoculated seedlings showed decline and symptoms including small dark necrotic root lesions, root cankers, and loss of fine roots and tap root. The most aggressive species were P. cinnamomi, P. cryptogea, P. gonapodyides, P. plurivora and P. psychrophila followed by P. megasperma., while Phytophthora quercina and P. nicotianae were the less aggressive species. Results obtained confirm that these Phytophthora species could constituted a threat to Q. ilex ecosystems and the implications are further discussed.


Quercus spp Pathogenicity Inoculation Holm oak 



The authors are grateful to A. Solla and his team from the Centro Universitario de Plasencia-Universidad de Extremadura (Spain) for helping in the acorns collection and to the CIEF (Centro para la Investigación y Experimentación Forestal, Generalitat Valenciana, Valencia, Spain) for providing the acorns. This research was supported by funding from the project AGL2011-30438-C02-01 (Ministerio de Economía y Competitividad, Spain).

Compliance with ethical standards

Human and Animal Rights

The authors declare that ethical standards have been followed and that no human participants or animals were involved in this research.


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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 2018

Authors and Affiliations

  • Beatriz Mora-Sala
    • 1
    Email author
  • Paloma Abad-Campos
    • 1
  • Mónica Berbegal
    • 1
  1. 1.Instituto Agroforestal MediterráneoUniversitat Politècnica de ValènciaValenciaSpain

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