A fungal endophyte alters poplar leaf chemistry, deters insect feeding, and shapes insect community assembly

The endophytic fungi of certain grasses and other herbaceous plants have long been known to provide plants with anti-herbivore defense compounds, but there is little information about whether the endophytes of trees also engage in such mutualisms. We investigated the influence of the endophytic fungus Cladosporium sp. on the chemical defenses of black poplar (Populus nigra) trees and the consequences for feeding preference and fitness of herbivorous insects and insect community assembly. Endophyte colonization increased both constitutive- and induced poplar defenses. Generalist Lymantria dispar larvae preferred and performed better on uninfected over endophyte-infected poplar leaves, most likely due to higher concentrations of salicinoids in endophytic leaves and the endophyte-produced alkaloid stachydrine. Under field conditions, the endophytic fungus also shapes insect community assembly in young black poplar trees. Our results show that endophytic fungi can play a major role both in ..., , , # Data from: A fungal endophyte alters poplar leaf chemistry, deters insect feeding, and shapes insect community assembly

Corresponding author

Sybille B. Unsicker [[e-mail]](mailto:[e-mail])

## General description

This README file describes the data package accompanying the above-mentioned publication.

Files used in the analysis are either

1. .xlsx and .csv files for R.scripts
2. R. scripts
3. Excel file with a summary of raw data and data used for statistics in spss
4. MSMS data as .mzML files
5. Metaboanalyst.zip containing .csv files, R-history and Report.pdf obtained from metaboanalyst
6. IBM SPSS-syntax file

## Code/ software

1. .xlsx and .csv files for R.scripts R 4.3.2
2. R. scripts: Files can be opened using R 4.3.2
3. Excel file with a summary of raw data and data used for statistics in IBM SPSS statistics 25
4. MSMS data as .mzML files: Files can be opened using open software e.g., ProteoWizard or OpenMS.
5. Metaboanalyst.zip containi...