Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR2017MC057)
Key Technology Research and Development Program of Shandong (2018YFD0100303)
the System of Modern Agriculture Industrial Technology (SDAIT-03-03/05)
Innovative Research Group Project of the National Natural Science Foundation of China (Grant No. 31621005)
Received: 20 August 2019
Accepted: 8 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: The collection of plant materials used in our study complied with institutional and national guidelines. Field studies were conducted in accordance with local legislation.
: Not applicable.
: The authors declare that they have no competing interests.