Abstract

Concentrations of carbon dioxide (CO2) are increasing in the atmosphere, affecting soybean (Glycine max L.) phytohormone signaling and herbivore resistance. Whether the impact of elevated CO2 on phytohormones and induced defenses is a generalized response within this species is an open question. We examined jasmonic acid (JA) and salicylic acid (SA) under ambient and elevated CO2 concentrations with and without Japanese beetle (Popilliajaponica Newman) damage and artificial damage across six soybean cultivars (HS93-4118, Pana, IA 3010, Loda, LN97-15076, and Dwight). Elevated CO2 reduced constitutive levels of JA and related transcripts in some but not all soybean cultivars. In contrast to the variation in JA, constitutive levels of salicylic were increased universally among soybean cultivars grown under elevated CO2. Variation in hormonal signaling may underpin observed variation in the response of insect herbivores and pathogens to plants grown under elevated CO2.

Original languageEnglish (US)
Pages (from-to)1435-1442
Number of pages8
JournalEnvironmental entomology
Volume41
Issue number6
DOIs
StatePublished - Dec 1 2012

Fingerprint

salicylic acid
soybean
Glycine max
carbon dioxide
cultivar
jasmonic acid
herbivore
acid
soybeans
damage
plant hormones
cultivars
herbivores
beetle
pathogen
Popillia japonica
insect
atmosphere
insects
pathogens

Keywords

  • global change
  • jasmonic acid
  • plant-insect interactions
  • salicylic acid

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Insect Science

Cite this

Elevated carbon dioxide increases salicylic acid in glycine max. / Casteel, Clare L.; Segal, Lauren M.; Niziolek, Olivia K.; Berenbaum, May R.; Delucia, Evan H.

In: Environmental entomology, Vol. 41, No. 6, 01.12.2012, p. 1435-1442.

Research output: Contribution to journalArticle

Casteel, Clare L. ; Segal, Lauren M. ; Niziolek, Olivia K. ; Berenbaum, May R. ; Delucia, Evan H. / Elevated carbon dioxide increases salicylic acid in glycine max. In: Environmental entomology. 2012 ; Vol. 41, No. 6. pp. 1435-1442.
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