Intraspecific differences in plant defense induction by fall armyworm strains

Flor E. Acevedo, Michelle Peiffer, Swayamjit Ray, Robert Meagher, Dawn S. Luthe, Gary Felton

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The underlying adaptive mechanisms by which insect strains are associated with specific plants are largely unknown. In this study, we investigated the role of herbivore-induced defenses in the host plant association of fall armyworm (Spodoptera frugiperda) strains. We tested the expression of herbivore-induced defense-related genes and the activity of plant-defensive proteins in maize and Bermuda grass upon feeding by fall armyworm strains. The rice strain caterpillars induced greater accumulation of proteinase inhibitors in maize than the corn strain caterpillars. In Bermuda grass, feeding by the corn strain suppressed induction of trypsin inhibitor activity whereas the rice strain induced greater activity levels. Differences in elicitation of these plant defenses by the two strains seems to be due to differences in the activity levels of the salivary enzyme phospholipase C. The levels of plant defense responses were negatively correlated with caterpillar growth, indicating a fitness effect. Our results indicate that specific elicitors in the saliva of fall armyworm stains trigger differential levels of plant defense responses that affect caterpillar growth and thus may influence host plant associations in field conditions. The composition and secretion of plant defense elicitors may have a strong influence in the host plant association of insect herbivores.

Original languageEnglish (US)
Pages (from-to)310-321
Number of pages12
JournalNew Phytologist
Volume218
Issue number1
DOIs
StatePublished - Apr 1 2018

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Spodoptera frugiperda
Herbivory
Zea mays
insect larvae
Cynodon
herbivores
corn
host plants
Cynodon dactylon
Insects
plant secretions and exudates
rice
Spodoptera
Plant Proteins
insects
Trypsin Inhibitors
phospholipase C
botanical composition
Type C Phospholipases
trypsin inhibitors

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

Acevedo, F. E., Peiffer, M., Ray, S., Meagher, R., Luthe, D. S., & Felton, G. (2018). Intraspecific differences in plant defense induction by fall armyworm strains. New Phytologist, 218(1), 310-321. https://doi.org/10.1111/nph.14981
Acevedo, Flor E. ; Peiffer, Michelle ; Ray, Swayamjit ; Meagher, Robert ; Luthe, Dawn S. ; Felton, Gary. / Intraspecific differences in plant defense induction by fall armyworm strains. In: New Phytologist. 2018 ; Vol. 218, No. 1. pp. 310-321.
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Acevedo, FE, Peiffer, M, Ray, S, Meagher, R, Luthe, DS & Felton, G 2018, 'Intraspecific differences in plant defense induction by fall armyworm strains', New Phytologist, vol. 218, no. 1, pp. 310-321. https://doi.org/10.1111/nph.14981

Intraspecific differences in plant defense induction by fall armyworm strains. / Acevedo, Flor E.; Peiffer, Michelle; Ray, Swayamjit; Meagher, Robert; Luthe, Dawn S.; Felton, Gary.

In: New Phytologist, Vol. 218, No. 1, 01.04.2018, p. 310-321.

Research output: Contribution to journalArticle

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