Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics

The American Naturalist
Nora Underwood, Mark Rausher

Abstract

Although it has been suggested that induced and constitutive plant resistance should have different effects on insect herbivore population dynamics, there is little experimental evidence that plant resistance can influence herbivore populations longer than one season. We used a density-manipulation experiment and model fitting to examine the effects of constitutive and induced resistance on herbivore dynamics over both the short and long term. We used likelihood methods to fit population dynamic models to recruitment data for populations of Mexican bean beetles on soybean varieties with no resistance, constitutive resistance, or induced resistance. We compared model configurations that fit parameters for resistance types separately to models that did not account for resistance type. Models representing the hypothesis that the three resistance types differed in their effects on beetle dynamics received the most support. Induced resistance resulted in lower population growth rates and stronger density dependence than no resistance. Constitutive resistance resulted in lower population growth rates and stronger density dependence than induced resistance. Constitutive resistance had a stronger effect on both short-term beetle recrui...Continue Reading

References

Feb 1, 1988·Trends in Ecology & Evolution·J C Schultz

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Citations

May 12, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·C R YesudasD A Lightfoot
May 9, 2009·PloS One·Peter DalinChrister Björkman
Mar 10, 2015·Journal of Theoretical Biology·Ellen van Velzen, Rampal S Etienne
Sep 14, 2011·Annual Review of Entomology·C Michael Smith, Stephen L Clement
Jul 22, 2004·The American Naturalist·Anurag A Agrawal
Jan 26, 2016·The American Naturalist·Christopher R StiehaKatja Poveda
Dec 15, 2015·Journal of Chemical Ecology·Ken Keefover-RingKenneth F Raffa
Aug 24, 2007·Journal of Evolutionary Biology·V CalcagnoD Bourguet
Apr 11, 2019·The Journal of Animal Ecology·Mônica F Kersch-Becker, Jennifer S Thaler
Sep 8, 2017·Proceedings. Biological Sciences·Mônica F Kersch-BeckerJennifer S Thaler

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