Funding for this research was provided by:
Fundamental Research Funds of Chinese Academy of Forestry (CAFYBB2017ZY002, CAFYBB2017ZA001-8)
Received: 9 November 2019
Accepted: 24 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: This article does not contain any studies with human participants or animals performed by any of the authors. All the plant materials used in this study were provided by Research Institute of Forestry, Chinese Academy of Forestry. The field experiments were conducted under local legislation and permissions.
: Not applicable.
: The authors declare that they have no competing interests.