About the Authors

Andrea Obersteiner

Affiliation Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München—German Research Centre for Environmental Health (GmbH), Neuherberg, Germany

Stefanie Gilles

Affiliations Institute of Environmental Medicine, UNIKA-T, Technische Universität München, Augsburg, Germany, CK Care, Christine-Kühne-Center for Allergy Research and Education, Davos, Switzerland

Ulrike Frank

Affiliation Institute of Biochemical Plant Pathology, Helmholtz Zentrum München–German Research Centre for Environmental Health (GmbH), Neuherberg, Germany

Isabelle Beck

Affiliation Institute of Environmental Medicine, UNIKA-T, Technische Universität München, Augsburg, Germany

Franziska Häring

Affiliation Institute of Environmental Medicine, UNIKA-T, Technische Universität München, Augsburg, Germany

Dietrich Ernst

Affiliation Institute of Biochemical Plant Pathology, Helmholtz Zentrum München–German Research Centre for Environmental Health (GmbH), Neuherberg, Germany

Michael Rothballer

Affiliation Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München—German Research Centre for Environmental Health (GmbH), Neuherberg, Germany

Anton Hartmann

Affiliation Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München—German Research Centre for Environmental Health (GmbH), Neuherberg, Germany

Claudia Traidl-Hoffmann

Affiliations Institute of Environmental Medicine, UNIKA-T, Technische Universität München, Augsburg, Germany, CK Care, Christine-Kühne-Center for Allergy Research and Education, Davos, Switzerland

Michael Schmid

michael.schmid@helmholtz-muenchen.de

Affiliation Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München—German Research Centre for Environmental Health (GmbH), Neuherberg, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AO SG UF CTH DE AH MR MS. Performed the experiments: AO SG UF. Analyzed the data: AO SG UF. Contributed reagents/materials/analysis tools: AO SG UF. Wrote the paper: AO SG UF MR MS. Supervision: MR MS. Calculation of Urbanization Index: FH. Determination of pollen collection day: IB.