| Title |
Host plant iridoid glycosides mediate herbivore interactions with natural enemies
|
|---|---|
| Published in |
Oecologia, July 2018
|
| DOI | 10.1007/s00442-018-4224-1 |
| Pubmed ID | |
| Authors |
Caitlin A. Kelly, M. Deane Bowers |
| Abstract |
Many insect herbivores are dietary specialists capable of sequestering the secondary metabolites produced by their host plants. These defensive compounds have important but complex implications for tritrophic interactions between plants, herbivores, and natural enemies. The sequestration of host plant secondary metabolites defends herbivores from attack by generalist predators, but may also compromise the immune response, making insect herbivores more vulnerable to parasitism. Here, we investigate the role of plant secondary metabolites in mediating interactions between a specialist herbivore and its natural enemies. The host plants are two Penstemon species, Penstemon glaber and Penstemon virgatus, which are chemically defended by iridoid glycosides (IGs). First, we examined how Penstemon iridoid glycoside content influences the sequestration of IGs by a specialist herbivore, Euphydryas anicia. Then, we performed ant bioassays to assess how host plant species influences larval susceptibility to predators and phenoloxidase assays to assess the immunocompetence and potential vulnerability to parasitoids and pathogens. We found that the concentration of IGs sequestered by E. anicia larvae varied with host plant diet. Larvae reared on P. glaber sequestered more IGs than larvae reared on P. virgatus. Yet, ant predators found larvae unpalatable regardless of host plant diet and were also repelled by sugar solutions containing isolated IGs. However, E. anicia larvae reared on P. glaber showed higher levels of phenoloxidase activity than larvae reared on P. virgatus. Our results suggest that the sequestration of some secondary metabolites can effectively protect herbivores from predation, yet may also increase vulnerability to parasitism via decreased immunocompetence. |
X Demographics
The data shown below were collected from the profiles of 4 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 25% |
| Unknown | 3 | 75% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 4 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 30 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 30 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 6 | 20% |
| Researcher | 5 | 17% |
| Student > Master | 5 | 17% |
| Student > Bachelor | 2 | 7% |
| Unspecified | 1 | 3% |
| Other | 1 | 3% |
| Unknown | 10 | 33% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 15 | 50% |
| Environmental Science | 2 | 7% |
| Biochemistry, Genetics and Molecular Biology | 2 | 7% |
| Unspecified | 1 | 3% |
| Social Sciences | 1 | 3% |
| Other | 0 | 0% |
| Unknown | 9 | 30% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 24 September 2019.
All research outputs
#15,927,374
of 25,654,806 outputs
Outputs from Oecologia
#3,257
of 4,537 outputs
Outputs of similar age
#191,288
of 340,197 outputs
Outputs of similar age from Oecologia
#52
of 72 outputs
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