Lack of correlation between constitutive and induced resistance to a herbivore in crucifer plants: real or flawed by experimental methods?

P.J. Zhang, J.P. Shu, Z.Y. Wu, M. Dicke, S.S. Liu

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

The correlation between constitutive and induced resistance to herbivores in plants has long been of interest to evolutionary biologists, and various approaches to determining levels of resistance have been used in this field of research. In this study, we examined the relationship between constitutive and induced resistance to the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), in 11 closely related species of wild crucifers. We assessed the survival, development, and reproduction of the test insects and calculated their intrinsic rate of increase as an indicator of constitutive and induced resistance for the plants. We used larvae of P. xylostella and jasmonic acid as elicitors of the induced response. We failed to find a correlation between constitutive and induced resistance in these crucifer plants when the induction of resistance was initiated by either herbivory or jasmonic acid application. Analysis of the results suggests that the failure to detect a relationship between the two types of resistance could be caused by flaws in measuring constitutive resistance, which was apparently confounded with induced resistance. We discuss the difficulties and pitfalls in measuring constitutive resistance and ways to improve the methodology in investigating the relationships between constitutive and induced resistance in plants
Original languageEnglish
Pages (from-to)58-66
JournalEntomologia Experimentalis et Applicata
Volume131
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • jasmonate-induced responses
  • diamondback moth
  • oviposition preference
  • arabidopsis-thaliana
  • volatile emission
  • indirect defenses
  • methyl jasmonate
  • trade-offs
  • acid
  • lepidoptera

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