Funding for this research was provided by:
Beijing Natural Science Foundation of China (6162014)
National Natural Science Foundation of China (31870573)
Science and technology project of Beijing Municipal Administration Center of Parks (zx 2018014)
Article History
Received: 7 October 2018
Accepted: 26 February 2019
First Online: 4 April 2019
Ethics approval and consent to participate
: All plant materials (including seeds) used in our study were permited collecting from Beijing Institute of Landscape Architecture. Experimental research on plants (either cultivated or wild), including collection of plant material, have complied with institutional, national, or international guidelines. A statement has been included in the manuscript stating that our field work has been approved in accordance with relevant local legislation and in accordance with relevant guidelines.
: Not applicable.
: The authors declare that they have no competing interests.
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