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Journal of Chemical Ecology

, Volume 38, Issue 2, pp 204–212 | Cite as

Stability of Plant Defensive Traits Among Populations in Two Eucalyptus Species Under Elevated Carbon Dioxide

  • Adam B. McKiernanEmail author
  • Julianne M. O’Reilly-Wapstra
  • Cassandra Price
  • Noel W. Davies
  • Brad M. Potts
  • Mark J. Hovenden
Article

Abstract

Plant secondary metabolites (PSMs) mediate a wide range of ecological interactions. Investigating the effect of environment on PSM production is important for our understanding of how plants will adapt to large scale environmental change, and the extended effects on communities and ecosystems. We explored the production of PSMs under elevated atmospheric carbon dioxide ([CO2]) in the species rich, ecologically and commercially important genus Eucalyptus. Seedlings from multiple Eucalyptus globulus and E. pauciflora populations were grown in common glasshouse gardens under elevated or ambient [CO2]. Variation in primary and secondary chemistry was determined as a function of genotype and treatment. There were clear population differences in PSM expression in each species. Elevated [CO2] did not affect concentrations of individual PSMs, total phenolics, condensed tannins or the total oil yield, and there was no population by [CO2] treatment interaction for any traits. Multivariate analysis revealed similar results with significant variation in concentrations of E. pauciflora oil components between populations. A [CO2] treatment effect was detected within populations but no interactions were found between elevated [CO2] and population. These eucalypt seedlings appear to be largely unresponsive to elevated [CO2], indicating stronger genetic than environmental (elevated [CO2]) control of expression of PSMs.

Keywords

Elevated CO2 Eucalyptus Genetic variation Plant secondary metabolites PSM Carbon dioxide Terpene Essential oil Phenolic Condensed tannin 

Notes

Acknowledgements

We thank Hugh Fitzgerald for assistance with laboratory work, Ian Cummings and Tracy Winterbottom for glasshouse support, and Greg Jordan, Joe Bailey, René Vaillancourt, Natasha Wiggins, Rebecca Jones and Tanya Bailey for comments on the manuscript. We thank Alieta Eyles for FPC standards. We also thank anonymous reviewers for offering constructive feedback on the manuscript. The work was supported by ARC Discovery grants to BP and JO’R-W (DP0773686), and by ARC Linkage grant LP0991026 (industry partner Greening Australia).

Supplementary material

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Supplemental Table 1 (DOCX 13 kb)
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Supplemental Table 2 (DOCX 16 kb)
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Supplemental Table 3 (DOCX 17 kb)
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Supplemental Table 4 (DOCX 19 kb)

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Adam B. McKiernan
    • 1
    Email author
  • Julianne M. O’Reilly-Wapstra
    • 1
  • Cassandra Price
    • 1
  • Noel W. Davies
    • 2
  • Brad M. Potts
    • 1
  • Mark J. Hovenden
    • 1
  1. 1.School of Plant Science and CRC for ForestryUniversity of TasmaniaHobartAustralia
  2. 2.Central Science LaboratoryUniversity of TasmaniaHobartAustralia

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