Modulation of immune responses of Rhynchophorus ferrugineus (Insecta: Coleoptera) induced bythe entomopathogenic nematode Steinernema carpocapsae (Nematoda: Rhabditida).

Barbara Rosy Ines Manachini, Vincenzo Arizza, Maristella Mastore, Maurizio F. Brivio

Risultato della ricerca: Article

19 Citazioni (Scopus)

Abstract

Aim of this study was to investigate relationships between the red palm weevil (RPW)Rhynchophorus ferrugineus (Olivier) and the entomopathogenic nematode Steinernema carpocapsae(EPN); particularly, the work was focused on the immune response of the insect host in naive larvae andafter infection with the EPN. Two main immunological processes have been addressed: the activity andmodulation of host prophenoloxidase-phenoloxidase (proPO) system, involved in melanization of not-selfand hemocytes recognition processes responsible for not-self encapsulation. Moreover, immune depressiveand immune evasive strategies of the parasite have been investigated. Our results suggest that RPWpossess an efficient immune system, however in the early phase of infection, S. carpocapsae induces astrong inhibition of the host proPO system. In addition, host cell-mediated mechanisms of encapsulation,are completely avoided by the parasite, the elusive strategies of S. carpocapsae seem to be related to thestructure of its body-surface, since induced alterations of the parasite cuticle resulted in the loss of its mimetic properties. S. carpocapsae before the release of its symbiotic bacteria, depress and elude RPWimmune defenses, with the aim to arrange a favorable environment for its bacteria responsible of thesepticemic death of the insect target.
Lingua originaleEnglish
pagine (da-a)748-760
Numero di pagine13
RivistaInsect Science
Volumeon-line
Stato di pubblicazionePublished - 2015

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All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science
  • Biochemistry, Genetics and Molecular Biology(all)
  • Insect Science

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