Received: 30 July 2019
Accepted: 5 July 2020
First Online: 10 July 2020
Ethics approval and consent to participate
: The mother plants and root zone soils of three <i>Adiantum</i> species in the present study were obtained from public land with the permissions of Guilin government. The pot experiments on such plants, including their field collection, were performed at Guilin Botanical Garden, and they complied with the national guidelines of China and the Convention on the Trade in Endangered Species of Wild Fauna and Flora.
: Not applicable.
: The authors declare that they have no competing interests.