Leaf herbivory induces resistance against florivores in Raphanus sativus

Andrew C. McCall, Samantha Case, Kelsy Espy, Grant Adams, Stephen J. Murphy

Research output: Contribution to journalComment/debatepeer-review

8 Scopus citations

Abstract

Florivory can have significant negative effects on plant fitness, driving selection for resistance traits in flowers. In particular, herbivory to leaves may induce resistance in flowers because herbivores on leaves often become florivores on flowers as plant ontogeny proceeds. The literature on inducible resistance in floral tissues is limited, so we used a series of experiments to determine whether prior leaf damage by Spodoptera exigua (Hübner) caterpillars affected florivore preference and performance on wild radish (Raphanus sativus L.). We found that Spodoptera exigua larvae preferred petals from control plants versus petals from plants exposed to prior leaf damage, and that larvae gained more mass on petals from control plants, although this depended on the presence of anthocyanins in the petals. Our results suggest that leaf damage can induce changes in petals that reduce Spodoptera exigua larval fitness.

Original languageEnglish (US)
Pages (from-to)337-343
Number of pages7
JournalBotany
Volume96
Issue number5
DOIs
StatePublished - 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© Published by NRC Research Press.

Keywords

  • Anthocyanins
  • Floral herbivory
  • Florivory
  • Induced resistance
  • Raphanus sativus

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