Funding for this research was provided by:
National Natural Science Foundation of China (31571625, 31850410472)
Guangzhou Science and Technology Key Program (201707020015)
Guangdong Province Key Research and Development Program (2018B020202012)
Text and Data Mining valid from 2020-02-21
Received: 5 August 2019
Accepted: 14 February 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: Plant samples used in the study were not collected from national park or natural reserve. According to national and local legislation, no specific permission was required for collecting these plants. We confirm that this complies with national guidelines and no formal ethics approval was required in this particular case.
: Not applicable.
: The authors declare that they have no competing interests.