Funding for this research was provided by:
National Natural Science Foundation of China (31360585)
Received: 17 July 2017
Accepted: 28 December 2017
First Online: 15 January 2018
Ethics approval and consent to participate
: The seeds were kindly provided by the College of Agriculture and Animal Husbandry, ChiFeng, China. The experimental research on plants, including collection of plant material, complied with institutional, national, or international guidelines and complied with the Convention on the Trade in Endangered Species of Wild Fauna and Flora. These two materials have been deposited in a publicly available herbarium. All field experiments were conducted in accordance with Environmental Protection law of the People’s Republic of China and did not involve endangered or protected species.
: Not applicable
: All authors declare that they have no competing interests.
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