Funding for this research was provided by:
Fundamental Research Funds for the Central Universities (2017QNA6013)
111 project of China (B17039)
Received: 11 March 2019
Accepted: 28 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: Tobacco seeds were provided by Dr. Bingguang Xiao from the Yunnan Academy of Tobacco Agricultural Sciences. The tobacco plants were grown in growth chambers at Zhejiang University. During the execution of these experiments, all plant materials collected were destroyed at the conclusion of the work. No field experiments were included in this study. All collection of plant material was done under compliance with any applicable institutional, national, or international guidelines, and as such no specific permissions and/or licenses were required in order to comply with the Convention on the Trade in Endangered Species of Wild Fauna and Flora since these plants fall outside of this jurisdiction.
: Not applicable.
: The authors declare that they have no competing interests.