Journal article

Jasmonate-induced plant defenses and prey availability impact the preference and performance of an omnivorous stink bug, Podisus maculiventris

  • Thaler, Jennifer S. Department of Entomology, Cornell University, Comstock Hall, Ithaca, USA - Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, USA
  • Olsen, Elena L. Department of Entomology, Cornell University, Comstock Hall, Ithaca, USA - Department of Biology, University of Fribourg, Switzerland
  • Kaplan, Ian Department of Entomology, Purdue University, West Lafayette, USA
    18.01.2015
Published in:
  • Arthropod-Plant Interactions. - 2015, p. 1–8
English Many omnivorous insects are important biological control agents, and their success is influenced by both plant resistance and prey availability. The potential impact of these two factors is complicated by the fact that they may not be independent: Resistant plants also often support fewer herbivorous prey. We studied how lifetime development, growth, fecundity and preference of the omnivorous stink bug, Podisus maculiventris, was affected by jasmonate-induced plant defenses and amount of prey available. P. maculiventris survival was 70 % lower on high-resistance (jasmonate-overexpressing) plants compared to low-resistance (jasmonate-insensitive) plants. However, surviving P. maculiventris grew and achieved equal fecundity on low- and high-resistance plants. When given a choice, P. maculiventris preferred low-resistance plants, but did not differentiate between caterpillar prey reared on high- or low-resistance plants. Low prey availability impacted distinct aspects of P. maculiventris performance: Development time was lengthened, and nymphal and adult mass were reduced, but survival was not impacted. We did not detect any interactive effects between plant resistance and prey availability for any measure of P. maculiventris. Thus, we found remarkably compartmentalized impacts of plant resistance and prey availability for this omnivorous insect.
Faculty
Faculté des sciences et de médecine
Department
Département de Biologie
Language
  • English
Classification
Biological sciences
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/304196
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