1 Faculty of Biology and Preclinical Medicine, University of Regensburg, Universitätsstraße 31, Regensburg, D-93053, Germany.
2 Royal Botanic Gardens, Kew, Wakehurst, Ardingly, Haywards Heath, West Sussex, RH17 6TN, UK.
*  Corresponding author: Roberta L. C. Dayrell (dayrell.rlc@gmail.com)
Open Research Statement:  Datasets are available on Figshare repository https://doi.org/10.6084/m9.figshare.21206507.