Replication Data for: Phenolic concentrations and carbon/nitrogen ratio in annual shoots of bilberry (Vaccinium myrtillus) after simulated herbivory.

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Schrijvers-Gonlag, Marcel, 2024, "Replication Data for: Phenolic concentrations and carbon/nitrogen ratio in annual shoots of bilberry (Vaccinium myrtillus) after simulated herbivory.", https://doi.org/10.18710/U8S3XX, DataverseNO, V2
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Description
This dataset contains data about annual shoots of bilberry (Vaccinium myrtillus): phenolic, carbon and nitrogen concentrations after simulated herbivory. This data was analysed and the results were published (see Related publication). Here follows the abstract of the publication: Herbivory can be reduced by the production of defense compounds (secondary metabolites), but generally defenses are costly, and growth is prioritized over defense. While defense compounds may deter herbivory, nutrients may promote it. In a field study in boreal forest in Norway, we investigated how simulated herbivory affected concentrations of phenolics (generally a defense) and the carbon/nitrogen (C/N) ratio in annual shoots of bilberry (Vaccinium myrtillus), a deciduous clonal dwarf shrub whose vegetative and generative parts provide forage for many boreal forest animals. We measured concentrations of total tannins, individual phenolics, nitrogen and carbon following several types and intensities of herbivory. We identified 22 phenolics: 15 flavonoids, 1 hydroquinone and 6 phenolic acids. After high levels of herbivory, the total tannin concentration and the concentration of these 22 phenolics together (called total phenolic concentration) were significantly lower in bilberry annual shoots than in the control (natural herbivory at low to intermediate levels). Low-intensive herbivory, including severe defoliation, gave no significantly different total tannin or total phenolic concentration compared with the control. Many individual phenolics followed this pattern, while phenolic acids (deterring insect herbivory) showed little response to the treatments: their concentrations were maintained after both low-intensive and severe herbivory. Contrary to our predictions, we found no significant difference in C/N ratio between treatments. Neither the Carbon:Nutrient Balance hypothesis nor the Optimal Defense hypotheses, theories predicting plant resource allocation to secondary compounds, can be used to predict changes in phenolic concentrations (including total tannin concentration) in bilberry annual shoots after herbivory: in this situation, carbon is primarily used for other functions (e.g., maintenance, growth, reproduction) than defense. (2024-02-10)
Subject Earth and Environmental Sciences
Keyword Plant-animal interactions, Simulated herbivory, Plant defense, Phenolics, HPLC, Carbon/nitrogen ratio, Vaccinium myrtillus, Bilberry annual shoots, Boreal forest, Tannins
Related Publication Schrijvers-Gonlag, Marcel; Skarpe, Christina; Julkunen-Tiitto, Riitta & Poléo, Antonio B. S. (2024). Phenolic concentrations and carbon/nitrogen ratio in annual shoots of bilberry (Vaccinium myrtillus) after simulated herbivory. PLoS ONE 19(3): e0298229. doi: 10.1371/journal.pone.0298229
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00_ClipExpVacmyr_20240305_README.txt
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01_ClipExpVacMyr_20230806_R-script.R
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