Article History
Received: 26 May 2020
Accepted: 30 September 2020
First Online: 7 October 2020
Ethics approval and consent to participate
: The collection of leaf samples was authorized and assisted by the Anxi Extra-arid Desert Nature Reserve. We confirmed that the field sampling did not involve any endangered or protected plant species and declare that the work reported here complies with the current laws of China and the IUCN Policy Statement on Research Involving Species at Risk of Extinction.
: Not applicable.
: The authors declare that they have no competing interests.