Funding for this research was provided by:
National Natural Science Foundation of China (31701471, 31571720)
Text and Data Mining valid from 2019-07-22
Received: 22 December 2018
Accepted: 21 May 2019
First Online: 22 July 2019
Ethics approval and consent to participate
: We have all relevant rights to the materials used in this study. All materials were grown in the field in accordance with local legislation.
: All authors agreed with the publication.
: The authors declare that they have no competing interests.